Kongsberg Simrad SN90 Reference Manual
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Kongsberg Simrad SN90 Reference Manual

Kongsberg Simrad SN90 Reference Manual

Purse seine and trawling sonar
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Table of Contents

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Reference Manual
Simrad SN90
Purse seine and trawling sonar
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Summary of Contents for Kongsberg Simrad SN90

  • Page 1 Reference Manual Simrad SN90 Purse seine and trawling sonar www.kongsberg.com/sn90...
  • Page 3 Additional end-user documents related to the SN90 system can be found on our website. This includes publications that are translated into other languages. Selected publications are also provided in IETM (Interactive Electronic Technical Manual) formats. • https://www.kongsberg.com/sn90 381294/E April 2023 © Kongsberg Discovery AS...
  • Page 4 Kongsberg Discovery disclaims any responsibility for damage or injury caused by improper installation, use or maintenance of the equipment. Disclaimer Kongsberg Discovery AS endeavours to ensure that all information in this document is correct and fairly stated, but does not accept liability for any errors or omissions. Support information If you require maintenance or repair, contact your local dealer.

  • Page 5: Table Of Contents

    Reference Manual Table of contents ABOUT THIS MANUAL ............13 SIMRAD SN90................ 15 Important..........................16 System description ......................18 System diagram........................21 System units ........................23 Display description....................23 Processor Unit description..................23 Operating Panel description ...................24 Transceiver Unit description ..................25 Hull Unit description ....................25 Transducer description ...................27 Order information ......................29...
  • Page 6 Simrad SN90 Saving the current user settings................79 Defining the ping (transmission) modes..............80 Context-sensitive online help...................81 OPERATING PROCEDURES ............. 82 Getting started........................83 Turning on the SN90 system ..................83 Lowering and hoisting the transducer from the user interface .......84 Turning off the SN90 system..................86 Choosing operating mode and key transmit parameters ..........87...
  • Page 7 Reference Manual Reducing bottom and surface reverberation with the RCG (Reverberation Controlled Gain) function................122 Reducing noise and false echoes with the Ping-Ping Filter .........123 Reducing the strong bottom echo to see fish close to the seabed......124 Adjusting the intensity of the echo presentations..........125 Recording and replaying echo data................127 Defining the file and folder settings for data recording........127 Recording echo data .....................128...
  • Page 8 Simrad SN90 Selecting menu language..................156 Hiding the menu system ..................157 Placing the menu on the left side of the display presentation ......158 Selecting the information to appear on the top bar ..........158 Enabling Coordinated Universal Time (UTC) on the bottom bar ......159 Selecting which tooltips to appear in the user interface ........160...
  • Page 9 Reference Manual Setting up the interface for course gyro input ............202 Configuring the sensor priority................205 Setting up the input from a motion reference unit (MRU)........206 Setting up the SN90 system for synchronized operation ........209 Setting up input from buoys, fish aggregating devices and other external objects ......................
  • Page 10 Simrad SN90 Top bar overview....................297 Logo and product name ..................299 Menu........................300 Screen Recording ....................300 Screen Capture .....................301 Record ........................302 Hull Unit.......................304 Information panes overview .................305 Navigational information ..................307 Messages ......................311 Help ........................311 Operating system functions ..................312 Replay bar description ....................314 Sonar views........................316...
  • Page 11 Reference Manual Operation menu......................384 Display menu .........................387 Setup menu ........................391 Active menu ........................397 Objects menu .........................401 Visual Objects menu ......................405 Cosmetics menu ......................409 Shortcut menus ......................411 FUNCTIONS AND DIALOG BOXES......... 416 Main menu: functions and dialog boxes................417 User Settings dialog box..................417 Range function .....................420 Gain function ......................421 Tilt function ......................423...
  • Page 12 Simrad SN90 Stabilization function ...................455 Screen Captures dialog box ..................456 Beam Visualization dialog box................458 Diagnostics dialog box ..................459 Export dialog box ....................460 Installation dialog box ..................461 About dialog box ....................462 Active menu: functions and dialog boxes..............463 TVG function .......................464 Ping-Ping Filter function ..................466 Pulse Type function ....................468...
  • Page 13 Reference Manual Marker Output page....................518 Relay Output page ....................520 Screen Recording page ..................522 Screen Captures File Location page ..............524 Pages in the Display Options dialog box ...............526 General page......................527 Map Display page....................530 Safety Depth page ....................531 Tooltip page ......................533 Own Ship page .....................534 Vertical View Orientation page ................535 Off Centre page ....................535 Current Flow page ....................537...
  • Page 14 Simrad SN90 Software License page..................603 Transceiver Upgrade page ..................605 Pages in the Echogram dialog box.................606 Lines page......................606 Echogram page .....................609 Horizontal Axis page....................612 Pages in the Information Pane Options dialog box............614 Size Distribution page ..................614 Fish Position page ....................617 Bottom Detection page ..................620 Fish Size Adjustment page ...................622...

  • Page 15: About This Manual

    About this manual About this manual The purpose of this publication is to provide the descriptions, procedures and detailed parameter explanations required to allow for safe and efficient use of the SN90 system. The publication also provides you with a thorough understanding of the parameters and adjustments provided by the SN90 system.
  • Page 16 , SIMRAD ® and the Simrad ® logo are either registered trademarks, or trademarks of Kongsberg Discovery AS in Norway ® and other countries. Windows is a registered trademark of Microsoft Corporation in the United States and other countries. We want your feedback We always want to improve our products.

  • Page 17: Simrad Sn90

    Simrad SN90 Simrad SN90 Topics Important, page 16 System description, page 18 System diagram, page 21 System units, page 23 Order information, page 29 General safety rules, page 30 Network security, page 31 Support information, page 32 381294/E...

  • Page 18: Important

    Simrad SN90 Reference Manual Important The SN90 is an advanced product. It is used with other advanced products. There is important information that you need to know. Before you turn on the SN90 system Before you turn on the SN90 system, make sure that you have sufficient water depth...
  • Page 19 • Do not damage the outer protective skin of the transducer. • Do not step on the transducer cables. • Do not damage the transducer cables. Avoid exposure to sharp objects. Related topics Simrad SN90, page 15 381294/E...

  • Page 20: System Description

    Simrad SN90 Reference Manual System description The SN90 is a directional high frequency fish finding sonar. Due to the high resolution and long range, the SN90 sonar has proven to be a very efficient tool for both trawlers and purse seiners.
  • Page 21 Simrad SN90 In purse seine operations, the large frequency bandwidth makes the SN90 ideal for both mackerel and tuna, and even for herring. Trawlers have for many years relied on high resolution echo sounders - such as the Simrad ES70 - to find and estimate their catch. The disadvantage with echo sounders is the fact that they look straight down.
  • Page 22 The SN90 system is equipped with the celebrated signal processing software developed by Kongsberg Discovery. This includes Hyperbolic FM (HFM) transmissions. This pulse type is also known as "chirp". It ensures a clutter free picture with very high resolution in range.

  • Page 23: System Diagram

    Simrad SN90 System diagram The system diagram identifies the main components of a basic SN90 system. Only the main connections between the units are shown. Detailed interface capabilities and power cables are not shown. Display (The second display is optional.)
  • Page 24 Simrad SN90 Reference Manual A special version of the transducer housing is available for use on a hull unit. Two trawl hydrophones are added for use with a catch monitoring system. Both hydrophones point aft. Related topics Simrad SN90, page 15...

  • Page 25: System Units

    You may find it useful to have more than one display connected to the SN90 system. The number of displays must be chosen to fit the preferences of the crew. Related topics Simrad SN90, page 15 System units, page 23 Processor Unit description A dedicated maritime computer is provided.

  • Page 26: Operating Panel Description

    Simrad SN90 Reference Manual The HT20470 Processor Unit is available in two versions. The DC version operates on +24 VDC while the AC version operates on 100 to 240 VAC. Power supply: • : Mean Well Manufacturer • https://www.meanwell.com Manufacturer’s website: •...

  • Page 27: Transceiver Unit Description

    Simrad SN90 Related topics Simrad SN90, page 15 System units, page 23 Operating panels, page 36 Transceiver Unit description The Transceiver Unit is provided to transmit acoustic energy through water. After each transmission, the transceiver receives the echoes from the seabed and/or the water column.
  • Page 28 Simrad SN90 Reference Manual Caution When the transducer is lowered, the depth of water under the vessel must be monitored closely. If the transducer hits larger objects or bottom, the transducer shaft may be bent, or - in worst case - it can be broken off. A broken transducer shaft will cause water leakage through the top of the shaft.

  • Page 29: Transducer Description

    SN90 system is not used. For more information, refer to the end-user documentation provided by the manufacturer. Related topics Simrad SN90, page 15 System units, page 23 Lowering and hoisting the transducer from the sonar room, page 188 Transducer description The rectangular sonar transducer allows the sonar beam to provide the swath coverage of the water volume with electronic tilt.
  • Page 30 Simrad SN90 Reference Manual Rules for transducer handling A transducer must always be handled as a delicate instrument. Incorrect actions may damage the transducer beyond repair. A physical blow to the transducer face may easily damage one or more elements. Observe these transducer handling rules: •...

  • Page 31: Order Information

    Relevant order information is provided on our website. • https://www.kongsberg.com/sn90 Related topics Simrad SN90, page 15 381294/E...

  • Page 32: General Safety Rules

    Simrad SN90 Reference Manual General safety rules Safety is important. The safety precautions must be followed at all times during installation and maintenance work. WARNING The SN90 system operates on 115 VAC and/or 230 VAC at 50/60 Hz. This voltage is lethal! You must never work alone on high-voltage equipment! The hull unit is powered by a 3-phase high voltage.

  • Page 33: Network Security

    If a SN90 system is connected to a local area network, data security is important. Equipment manufactured by Kongsberg Discovery is often connected to a local area network (LAN). When you connect a computer to a local area network you will always expose the data on that computer.

  • Page 34: Support Information

    For this reason, we cannot accept responsibility for the network security. Kongsberg Discovery will not accept any responsibility for errors or damages caused by unauthorized use of or access to the SN90 system.
  • Page 35 Simrad SN90 • www.kongsberg.com/simrad Website • simrad.france@simrad.com E-mail address • : Kongsberg Underwater Technology LLC (KUTL) / Simrad Fisheries Company name • : 19210 33rd Ave W, Suite A, Lynnwood, WA 98036, USA Address • : +1 425 712 1136 Telephone •...
  • Page 36 Simrad SN90 Reference Manual China • : Kongsberg Maritime China Ltd Company name • : 555 Chuanqiao Road, China (Shanghai) Pilot Free Trade Zone, 201206, China Address • : +86 21 3127 9888 Telephone • : +86 21 3127 9555 Telefax •...

  • Page 37: Getting Started

    Getting started Getting started Topics Operating panels, page 36 Starting normal operation, page 57 Basic operating procedures, page 75 Context-sensitive online help, page 81 381294/E...

  • Page 38: Operating Panels

    Simrad SN90 Reference Manual Operating panels The optional Operating Panel contains all necessary control functions for normal operation of the SN90 system. The Operating Panel offers all necessary control functions for normal operation. The controls provided by the Operating Panel are arranged in logical functional groups.
  • Page 39 Getting started Main Switch Note A hull unit may be provided as an option. It allows you to lower and hoist the transducer. All information and tasks related to the hull unit may be disregarded and omitted if the SN90 system is installed without this unit. Power Press this button to turn the SN90 system on and off.
  • Page 40 Simrad SN90 Reference Manual middle position. If you want to place the transducer in position "Middle 2" you must use the dialog box. To open the Hull Unit Control Hull Unit Control dialog box, select on the top bar. Hull Unit...
  • Page 41 Getting started is intended to be used in a structured sequence that starts when you plan to shoot the purse seine. Mode The four buttons in the field are dedicated for user settings or presentation Mode modes. To choose which function to apply open the page.
  • Page 42 Simrad SN90 Reference Manual Cursor buttons offer menu and cursor control. Cursor Menu This is an "on/off" function. Unless you need to make frequent changes to the operating parameters, you may want to hide the menu from the display presentation. This gives you more space for echo information. When the menu is hidden, it is temporarily shown on the left or right side of the display presentation if you move the cursor to that position.
  • Page 43 Getting started Zoom Place the cursor anywhere in the view, right-click and press . Only one Zoom zoom level is provided. Select one more time to restore the original Zoom view. Off Centre Place the cursor anywhere in the view, right-click and press .
  • Page 44 Simrad SN90 Reference Manual Relevant information about the priority target can be found in the lower left corner of the view. If you think the text is small and hard to read, double-click on the text field. This will increase the text size.

  • Page 45: Operating Panel Description (Mk2)

    Getting started Operating Panel description (Mk2) The SN90 Operating Panel is the most important device for fast and efficient user interface.The Operating Panel offers all necessary control functions for normal operation. The controls provided by the Operating Panel are arranged in logical functional groups. This offers you clear and easy operation with fast access to key functionality.
  • Page 46 Simrad SN90 Reference Manual use your Operating Panel to control more than two sonars, press Sonar Select repeatedly to select. User Settings Presentation Modes On the Mk2 Operating Panel, the four buttons dedicated for user settings or presentation modes are located the top of the panel. To choose which function to apply open the page.
  • Page 47 Getting started Middle Down Use these buttons to lower and hoist the transducer. Note A hull unit may be provided as an option. It allows you to lower and hoist the transducer. All information and tasks related to the hull unit may be disregarded and omitted if the SN90 system is installed without this unit.
  • Page 48 Simrad SN90 Reference Manual function allows you to define the size of your trawl or purse Fishing Gear seine. This function is opened from the menu. Setup Gear Use the function to define your type of fishing gear. Use the...
  • Page 49 Getting started • Press on the Operating Panel. — Gear • Right-click and select on the shortcut Remove Gear Symbol menu to delete the markers from the view. Trawl When the function is activated, the Horizontal view presents a trawl illustration. The size and location of the image reflect the measurements you added in the dialog box.
  • Page 50 Simrad SN90 Reference Manual Related topics Getting started, page 35 Operating panels, page 36 381294/E...

  • Page 51: Operating Panel Description (Mk3)

    Getting started Operating Panel description (Mk3) The SN90 Operating Panel is the most important device for fast and efficient user interface.The Operating Panel offers all necessary control functions for normal operation. The controls provided by the Operating Panel are arranged in logical functional groups. This offers you clear and easy operation with fast access to key functionality.
  • Page 52 Simrad SN90 Reference Manual While the transducer is moving the indicator lamp flashes, and an audible signal is sounded. When the requested position has been reached, the indicator lamp is lit, and the audible signal stops. Rotary switches Turn a rotary switch to apply a predefined function. To choose which function to apply open the page.
  • Page 53 Getting started On the page, de-select if you do User Settings Setup New Manually Initiated Track not want new tracked targets to become priority targets. This page is located in the dialog box. To open the page, select on the menu.
  • Page 54 Simrad SN90 Reference Manual position your vessel in the best possible location before you shoot the purse seine. When you shoot the net: • Press on the Operating Panel. — Gear • Right-click and select on the shortcut menu. Place Gear Symbol...
  • Page 55 Getting started Mouse buttons These buttons correspond to the two most common buttons on a standard computer mouse. When an instruction tells you to "select" or "left-click", press the left button. When an instruction tells you to "right-click", press the right button. Trackball Use the trackball to control the cursor in the user interface.

  • Page 56: Microsoft Xbox Controller Description

    Simrad SN90 Reference Manual Microsoft Xbox Controller description You can use a Microsoft Xbox Controller to make basic adjustments to the sonar operation. To use the Xbox Controller, simply insert the USB receiver into a vacant USB slot on your Processor Unit. The operating system will recognize the device and automatically load the necessary drivers.
  • Page 57 Getting started Note Video data files will normally become very large. If you wish to record large amounts of data, make sure that you have enough space on your hard disk. Unless your Processor Unit is equipped with a very large disk, we recommend that you save the data to an external storage device.
  • Page 58 Simrad SN90 Reference Manual This button is not used. Circle Marker A single circle marker can be placed in the display presentation. The circle is drawn with the same diameter as your purse. By means of the circle you can see the size of the school relative to your purse.

  • Page 59: Starting Normal Operation

    Getting started Starting normal operation Topics Turning on the SN90 system for normal use, page 57 Getting to know the user interface, page 59 Getting to know presentation modes and views, page 61 Selecting Normal mode to start pinging, page 66 Adjusting the radius of the search area, page 67 Adjusting the gain (echo sensitivity), page 68 Changing the vertical angle of the sonar beams, page 70...
  • Page 60 Simrad SN90 Reference Manual On the Operating Panel, press , and keep it depressed for a few seconds. Power The blue indicator light in the button flashes while the Operating Panel establishes contact with the Processor Unit. When the connection has been made, the blue indicator light is lit permanently.

  • Page 61: Getting To Know The User Interface

    Getting started Getting to know the user interface The display presentation provided by the SN90 system consists of specific visual elements that work together. The visual elements provide you with the echo information you need, they help you to control the functionality needed to understand this information, and finally, they allow you to control the operational parameters.
  • Page 62 Simrad SN90 Reference Manual Top bar Sonar views Menu system Secondary menus Bottom bar Procedure Move the cursor to the top bar, and investigate the functions provided. Observe that small tooltips open to identify the various functions you can use.

  • Page 63: Getting To Know Presentation Modes And Views

    Getting started Move the cursor to the menu system on the right side of the presentation. menu is located at the top of the menu structure. It offers the most Main common functions for efficient use of the SN90 system. Below the menu, a Main set of dedicated icons are used to open the secondary menus.
  • Page 64 Simrad SN90 Reference Manual • Horizontal • Vertical • Plane • Inspection With the various beams provided by the SN90 system, it may be difficult to understand the concepts. How do these beams "behave" in the water? By means of a graphic...
  • Page 65 Getting started Using the function, you can change this opening angle to Horizontal Tx Sector 90, 120 degrees. menu controls which "cosmetic" features that used. Cosmetics At the bottom of the display presentation, select a suitable presentation mode, and activate the Vertical view. The Vertical view shows you a "vertical slice"...
  • Page 66 Simrad SN90 Reference Manual , select to open the dialog box. For the selected purse, Gear Fishing Gear Setup set the sink rate. • Horizontal dotted lines show the depth intervals. Use on the Depth Dividers menu to toggle these lines On or Off.
  • Page 67 Getting started • The selected range is divided into identical distances. • The distance and depth of the cursor's location is shown in the lower right corner of the view. • The current settings for range, gain and tilt are show in the lower left corner of the view.

  • Page 68: Selecting Normal Mode To Start Pinging

    Simrad SN90 Reference Manual Selecting Normal mode to start pinging In order to transmit ("ping") you must set the SN90 system to Normal operating mode. This is the default mode when the SN90 system is turned on. Context function controls the operating mode of the SN90 system. Normal mode Operation allows the SN90 system to transmit ("ping") through the water, and to receive the echoes.

  • Page 69: Adjusting The Radius Of The Search Area

    Getting started Related topics Getting started, page 35 Starting normal operation, page 57 Operation function, page 430 Adjusting the radius of the search area Some echoes are close, others are further away. It is often necessary to adjust the radius of the search area.

  • Page 70: Adjusting The Gain (Echo Sensitivity)

    Simrad SN90 Reference Manual Select Range Make the necessary adjustment. The following methods can be used to adjust this setting: Select [+] or [-] to choose the requested setting. Place the cursor on the button. Press and hold the left mouse button. Move the cursor horizontally over the button.
  • Page 71 Getting started The echo strength (A) changes with time. The minimum level of detection (B) is adjusted up or down with the function. Increasing the with a more positive number Gain Gain reduces the minimum level, and this increases the sensitivity. Only echoes over the minimum level are shown in the echogram (C).

  • Page 72: Changing The Vertical Angle Of The Sonar Beams

    Simrad SN90 Reference Manual Make the necessary adjustment. The following methods can be used to adjust this setting: Select [+] or [-] to choose the requested setting. Place the cursor on the button. Press and hold the left mouse button. Move the cursor horizontally over the button.
  • Page 73 Getting started As the distance from the bottom to the fish increases, the fish echoes become clearer. However, this assumes that the fish echoes are considerably stronger than the bottom echoes. • If you use a very small tilt (C) you are not bothered by bottom echoes. However, if the sea surface is gusty you will see echoes from the waves.

  • Page 74: Adjusting The Horizontal Direction Of The Sonar Beam

    Simrad SN90 Reference Manual Open the button and select if you wish to use the chosen setting in all Apply to all the views in the current presentation mode. Related topics Getting started, page 35 Starting normal operation, page 57...
  • Page 75 Getting started Procedure Click in the view you want to activate. The active view is identified with a thicker border. Unless you use the Apply to all function, all changes you make will only be applied to this view. Use the joystick to make the adjustment. Optionally: Turn the relevant rotary switch to make the adjustment.

  • Page 76: Turning Off The Sn90 System

    Simrad SN90 Reference Manual Turning off the SN90 system When you do not use the SN90 system, turn it off. Select on the top bar to turn Power Off off the SN90 system. You can also use the button on the Operating Panel. You Power must never turn off the SN90 system by means of the on/off switch on the Processor Unit.

  • Page 77: Basic Operating Procedures

    Getting started Basic operating procedures Topics Selecting the language displayed in the menus and dialog boxes, page 75 Selecting operating frequency for minimum noise, page 76 Hiding the menu system when you do not need it, page 77 Saving single or sequential screen captures, page 78 Saving the current user settings, page 79 Defining the ping (transmission) modes, page 80 Selecting the language displayed in the menus and dialog...

  • Page 78: Selecting Operating Frequency For Minimum Noise

    Simrad SN90 Reference Manual Selecting operating frequency for minimum noise function is used to control the centre frequency of the acoustic Frequency transmissions (pings). You can select any operational frequency from 70 to 120 kHz. All types of noise matter when you wish to find the best operating frequency.

  • Page 79: Hiding The Menu System When You Do Not Need It

    Getting started Related topics Getting started, page 35 Basic operating procedures, page 75 Frequency function, page 472 Hiding the menu system when you do not need it Unless you need to make frequent changes to the operating parameters, you may want to hide the menu from the display presentation.

  • Page 80: Saving Single Or Sequential Screen Captures

    Simrad SN90 Reference Manual Saving single or sequential screen captures While using the SN90 system you may wish to make a screen capture to save an instantaneous copy of the current presentation. Each screen capture you make is saved in format on the Processor Unit hard disk.

  • Page 81: Saving The Current User Settings

    Getting started Related topics Getting started, page 35 Basic operating procedures, page 75 Saving the current user settings When you have spent some time working with the SN90 system, you are probably using specific settings that you know are efficient for your purpose. It is a good idea to save these settings.

  • Page 82: Defining The Ping (Transmission) Modes

    Simrad SN90 Reference Manual Defining the ping (transmission) modes You can easily control how often the SN90 system shall transmit acoustic energy (a ping) into the water. You can disable the transmission altogether, set it to operate as fast as possible, or select a time interval.

  • Page 83: Context-Sensitive Online Help

    Getting started You can also change the value by selecting - and holding - the middle of the button, and move the cursor sideways. Drag the cursor sideways to increase or decrease the value. Release the mouse button when requested value is shown. to Single Ping.

  • Page 84: Operating Procedures

    Simrad SN90 Reference Manual Operating procedures Topics Getting started, page 83 Choosing operating mode and key transmit parameters, page 87 Controlling the gain and range settings, page 96 Using the markers and tracking features, page 105 Improving the recognition of fish and schools using receiver filters, page 118...

  • Page 85: Getting Started

    Operating procedures Getting started Topics Turning on the SN90 system, page 83 Lowering and hoisting the transducer from the user interface, page 84 Turning off the SN90 system, page 86 Turning on the SN90 system To use the SN90 system, you must first turn it on. To turn on the SN90 system use the button on the Operating Panel.

  • Page 86: Lowering And Hoisting The Transducer From The User Interface

    Simrad SN90 Reference Manual Once the program has started, observe that the display presentation fills the entire screen. The program starts up using the same settings as the last time you used it. If these settings are acceptable, continue operation. If you wish to alter any of the settings, see the relevant procedures.
  • Page 87 Operating procedures Context dialog box allows you to lower Hull Unit Control and hoist the transducer. The dialog box also provides status information about the transducer position. You can monitor the current position of the transducer and make changes to the position defaults. Caution If the transducer hits larger objects or bottom, the transducer shaft may be bent, or - in worst case - it can...

  • Page 88: Turning Off The Sn90 System

    Simrad SN90 Reference Manual Turning off the SN90 system When you do not use the SN90 system, turn it off. Select on the top bar to turn Power Off off the SN90 system. You can also use the button on the Operating Panel. You Power must never turn off the SN90 system by means of the on/off switch on the Processor Unit.

  • Page 89: Choosing Operating Mode And Key Transmit Parameters

    Operating procedures Choosing operating mode and key transmit parameters Topics Selecting Normal mode to start pinging, page 87 Selecting Replay mode, page 88 Selecting Inactive mode, page 89 Setting up the SN90 system for maximum echo refresh rate, page 90 Transmitting single pings, page 91 Transmitting with fixed-time intervals, page 92 Adjusting the output power to match varying conditions, page 92...

  • Page 90: Selecting Replay Mode

    Simrad SN90 Reference Manual to Maximum. Transmission Mode function enables or disables the SN90 transmissions into the Transmission Mode water. If you choose Maximum, the SN90 system will transmit (ping) continuously and as often as possible. This gives you the maximum refresh rate.

  • Page 91: Selecting Inactive Mode

    Operating procedures : The button shows you which file you are replaying. Select the button to Replay File open the dialog box. Replay File : This bar shows you the progress of the replay sequence. If Playback Progress you have chosen to restart the replay file(s) automatically (in a loop), the green indicator starts from left every time the file restarts.

  • Page 92: Setting Up The Sn90 System For Maximum Echo Refresh Rate

    Simrad SN90 Reference Manual Procedure Open the menu. Operation to Inactive. Operation When the SN90 system is disabled with this function, it will stop. The transmission ("pinging") stops.The current echoes are removed from the display presentation. Related topics Operating procedures, page 82...

  • Page 93: Transmitting Single Pings

    Operating procedures Related topics Operating procedures, page 82 Choosing operating mode and key transmit parameters, page 87 Setting up the SN90 system for maximum echo refresh rate, page 90 Transmitting single pings, page 91 Transmitting with fixed-time intervals, page 92 Transmission Mode function, page 431 Transmitting single pings You can set up the SN90 system to transmit a single ping only when you want it.

  • Page 94: Transmitting With Fixed-Time Intervals

    Simrad SN90 Reference Manual Transmitting with fixed-time intervals You can set up the SN90 system to transmit pings with a fixed time interval. Context to control how often the SN90 system shall transmit its energy Transmission Mode into the water. For normal use, choose Maximum. If you choose Maximum, the SN90 system will transmit (ping) continuously and as often as possible.
  • Page 95 Operating procedures conditions may make it appropriate to adjust the output power. Use to reduce Tx Power the transmitted acoustic energy compared to the maximum output. If you work in shallow and/or confined waters you may find it useful to reduce the output power to avoid reverberation.

  • Page 96: Selecting The Best Operating Frequency

    Simrad SN90 Reference Manual Selecting the best operating frequency function is used to control the centre frequency of the acoustic Frequency transmissions (pings). You can select any operational frequency from 70 to 120 kHz. All types of noise matter when you wish to find the best operating frequency.
  • Page 97 Operating procedures Related topics Operating procedures, page 82 Choosing operating mode and key transmit parameters, page 87 Frequency function, page 472 381294/E...

  • Page 98: Controlling The Gain And Range Settings

    Simrad SN90 Reference Manual Controlling the gain and range settings Topics Adjusting the gain (echo sensitivity), page 96 Adjusting the TVG (Time Variable Gain) setting, page 98 Adjusting the sonar range, page 99 Adjusting the intensity of the echo presentations, page 100...
  • Page 99 Operating procedures reduces the minimum level, and this increases the sensitivity. Only echoes over the minimum level are shown in the echogram (C). Do not confuse this setting with the (Time Variable Gain) setting. Gain During normal operating conditions we recommend that you keep the gain between 15 and 30.

  • Page 100: Adjusting The Tvg (Time Variable Gain) Setting

    Simrad SN90 Reference Manual Related topics Getting started, page 35 Starting normal operation, page 57 Gain function, page 421 Operating procedures, page 82 Controlling the gain and range settings, page 96 Adjusting the TVG (Time Variable Gain) setting When an acoustic pulse is sent through the water, it will gradually lose its energy. The greater the distance between the transducer and the target(s), the greater the loss of energy.

  • Page 101: Adjusting The Sonar Range

    Operating procedures Adjusting the sonar range Some echoes are close, others are further away. It is often necessary to adjust the radius of the search area. On the SN90 system, this is referred to as range. Context The range setting defines from how "far" you want to detect echoes. In other words, you specify the horizontal or vertical distance from the vessel to the outer edge of the search area.

  • Page 102: Adjusting The Intensity Of The Echo Presentations

    Simrad SN90 Reference Manual Select [+] or [-] to choose the requested setting. Place the cursor on the button. Press and hold the left mouse button. Move the cursor horizontally over the button. Release the mouse button when requested value is shown.

  • Page 103: Changing The Tilt

    Operating procedures Select the middle of the button to open it. If you have a keyboard connected to the SN90 system, type the requested value. Related topics Operating procedures, page 82 Controlling the gain and range settings, page 96 Improving the recognition of fish and schools using receiver filters, page 118 Display Gain function, page 441 Changing the tilt In order to detect fish or schools in the water column you may need to change the angle...
  • Page 104 Simrad SN90 Reference Manual school will easily be disguised by the bottom echoes. Once again you can activate the RCG function to improve the reading. With the various beams provided by the SN90 system, it may be difficult to understand the concepts.

  • Page 105: Adjusting The Bearing

    Operating procedures Adjusting the bearing The Horizontal view in the SN90 display presentation covers the entire sector of 160 degrees. For the other views you must define the horizontal direction of the beam. Use to adjust the horizontal angle referenced to the vessel heading. You can also Bearing select the bearing line and drag it sideways.
  • Page 106 Simrad SN90 Reference Manual Use the joystick to make the adjustment. Optionally: Turn the relevant rotary switch to make the adjustment. The Mk2 Operating Panel is fitted with three rotary switches. The switches are identified with numbers. Each switch can be assigned a function related to range, gain, bearing or tilt.

  • Page 107: Using The Markers And Tracking Features

    Operating procedures Using the markers and tracking features Topics Starting a position track, page 105 Starting a target track, page 107 Placing a new marker, page 108 Deleting a marker, page 109 Measuring the size of a school relative to the purse seine, page 110 Using visual aids during the purse seine catch phase, page 111 Selecting a geographical area for accurate target tracking, page 113 Defining the physical size of the tracking area, page 114...
  • Page 108 Simrad SN90 Reference Manual By default, a new manually initiated tracked object is automatically given priority status. Relevant information about the priority target can be found in the lower left corner of the view. If you think the text is small and hard to read, double-click on the text field.

  • Page 109: Starting A Target Track

    Operating procedures Starting a target track During normal operation, some echoes are clearly more interesting than others. In many situations specific echoes may be regarded as targets. To set up the SN90 system to provide such information, you can start target tracking. Context A target track permits the SN90 system to automatically control the tilt and bearing based on the movements of the chosen target.

  • Page 110: Placing A New Marker

    Simrad SN90 Reference Manual Procedure Place the cursor over the echo you wish to track. Press on the Operating Panel. (Mk1/Mk2) Target Track Press on the Operating Panel. (Mk3) Place Marker Place the cursor over the echo you wish to track.

  • Page 111: Deleting A Marker

    Operating procedures Procedure Place the cursor over the echo in the display presentation. Press on the Operating Panel. Marker Result Once an echo has been provided with a marker in the display presentation it is regarded as an object. The menu provides a list of all current objects.

  • Page 112: Measuring The Size Of A School Relative To The Purse Seine

    Simrad SN90 Reference Manual Related topics Operating panels, page 36 Objects menu, page 401 Shortcut menus, page 411 Operating procedures, page 82 Using the markers and tracking features, page 105 Using markers in the SN90 user interface, page 346 Measuring the size of a school relative to the purse seine Estimating the size of a school can sometimes be challenging.

  • Page 113: Using Visual Aids During The Purse Seine Catch Phase

    Operating procedures Using visual aids during the purse seine catch phase The gear symbol is provided as a tool to help you plan and shoot the purse seine. The symbol is intended to be used in a structured sequence that starts when you plan to shoot the purse seine.
  • Page 114 Simrad SN90 Reference Manual • Horizontal dotted lines show the depth intervals. • Relevant information about a priority target can be found in the lower left corner of the view. A line of X’es in the vertical views shows the bottom of the purse seine. The depth is defined for the fishing gear you have chosen.

  • Page 115: Selecting A Geographical Area For Accurate Target Tracking

    Operating procedures Selecting a geographical area for accurate target tracking When you have an echo you wish to track, the tracking functionality places a geographical area around the object. An invisible area - the tracking area - is created as an acquisition area. In order for the SN90 system to find and lock on the intended target, it needs to be kept within this tracking area.

  • Page 116: Defining The Physical Size Of The Tracking Area

    Simrad SN90 Reference Manual Related topics Operating procedures, page 82 Using the markers and tracking features, page 105 Using markers in the SN90 user interface, page 346 Defining the physical size of the tracking area, page 114 Tracking Area function, page 448...

  • Page 117: Choosing The Fishing Gear In Use

    Operating procedures Procedure Open the menu. Setup Select on the menu, open the button submenu, and select Tracking Area Setup Tracking Area Setup Make the necessary adjustments. Select to save the selected settings and close the dialog box. Further requirements Use the dialog box to change the size of the predefined area sizes.

  • Page 118: Changing The Fishing Gear Properties To Match Your Own Equipment

    Simrad SN90 Reference Manual Select an option from the list provided. Related topics Operating procedures, page 82 Using the markers and tracking features, page 105 Using markers in the SN90 user interface, page 346 Changing the fishing gear properties to match your own equipment, page 116...
  • Page 119 Operating procedures Related topics Operating procedures, page 82 Using the markers and tracking features, page 105 Using markers in the SN90 user interface, page 346 Choosing the fishing gear in use, page 115 Using visual aids during the purse seine catch phase, page 111 Fishing Gear function, page 450 381294/E...

  • Page 120: Improving The Recognition Of Fish And Schools Using Receiver Filters

    Simrad SN90 Reference Manual Improving the recognition of fish and schools using receiver filters Topics About the receiver filter sequence in the SN90 system, page 118 Reducing noise and reverberation with the AGC (Automatic Gain Control) function, page 119 Reducing propeller noise and interference with the Noise Filter, page 121...

  • Page 121: Reducing Noise And Reverberation With The Agc (Automatic Gain Control) Function

    Operating procedures Note that (Time Varied Gain) and are not filters, but included Gain Display Gain only to illustrate the complete "signal path". Related topics Operating procedures, page 82 Improving the recognition of fish and schools using receiver filters, page 118 Reducing noise and reverberation with the AGC (Automatic Gain Control) function, page 119 Reducing propeller noise and interference with the Noise Filter, page 121...
  • Page 122 Simrad SN90 Reference Manual The most practical way to use the AGC (Automatic Gain Control) is to first switch it off. Adjust the echo presentation using the normal gain functionality until you have the best possible result, then activate the AGC.

  • Page 123: Reducing Propeller Noise And Interference With The Noise Filter

    Operating procedures Reducing propeller noise and interference with the Noise Filter Unless you synchronize the transmissions from your other hydroacoustic systems you may have an issue with interference. Even with synchronization activated the noise from other nearby vessels may cause noise. Context is used to minimize the interference from other acoustics systems (sonars Noise Filter...

  • Page 124: Reducing Bottom And Surface Reverberation With The Rcg (Reverberation Controlled Gain) Function

    Simrad SN90 Reference Manual Reducing bottom and surface reverberation with the RCG (Reverberation Controlled Gain) function When you transmit an acoustic pulse into the water to search for a target, echoes will also be returned from any other objects in the beam. The energy reflected from these "unwanted"...

  • Page 125: Reducing Noise And False Echoes With The Ping-Ping Filter

    Operating procedures • : Use for scattered fish located close to the bottom. This setting uses a slightly different algorithm than the other scattered fish settings. • : Use for scattered fish located close to the bottom. This setting uses a slightly different algorithm than the other scattered fish settings.

  • Page 126: Reducing The Strong Bottom Echo To See Fish Close To The Seabed

    Simrad SN90 Reference Manual • : Select to disable the filter. The historical information from previous transmissions ("pings") is not used to remove noise and unwanted echoes. • : Select Weak to allow the filter to compare the echoes from the latest two pings.

  • Page 127: Adjusting The Intensity Of The Echo Presentations

    Operating procedures Procedure Click in any view to make it active. The active view is identified with a thicker border. Open the menu. Active Select Target Threshold Select a value from the options provided. Select a value to control the "strength" of the filter. A higher Target Threshold numerical value increases the filter efficiency and reduces the bottom echo accordingly.
  • Page 128 Simrad SN90 Reference Manual Adjust the setting to fit your requirements. To change the setting, move the cursor to either side of the button. Select the left side of the button to decrease the value. Select the right side of the button to increase the value.

  • Page 129: Recording And Replaying Echo Data

    Operating procedures Recording and replaying echo data Topics Defining the file and folder settings for data recording, page 127 Recording echo data, page 128 Locating the echo data files to delete, move or copy them, page 129 Selecting Replay mode, page 130 Choosing which echo data file(s) to replay, page 131 Defining the file and folder settings for data recording A useful function of the SN90 system is it ability to record echo data.

  • Page 130: Recording Echo Data

    Simrad SN90 Reference Manual Procedure Open the menu. Operation Select Output Observe that the dialog box opens. This dialog box contains a number of Output pages selected from the menu on the left side. Select to open the page. File Setup Choose the required settings.

  • Page 131: Locating The Echo Data Files To Delete, Move Or Copy Them

    Operating procedures Note The data files will normally become very large. If you wish to record large amounts of data, make sure that you have enough space on your hard disk. The SN90 system is not provided with unlimited disk capacity. We recommend that you save the data files to an external storage device.

  • Page 132: Selecting Replay Mode

    Simrad SN90 Reference Manual Select on the right side of the top bar. Minimize From the Windows ® button, right-click to open File Explorer. Start In the file manager utility, locate the folder you defined in the dialog box. File Setup Use the functionality provided by the operating system to delete the files, or to copy or move them to the storage device.

  • Page 133: Choosing Which Echo Data File(S) To Replay

    Operating procedures to Replay. Operation The replay bar opens automatically. It is positioned directly below the top bar at the top of the display presentation. If you need to select which files to replay, select under the Replay File Operation button.
  • Page 134 Simrad SN90 Reference Manual Procedure Open the menu. Operation Select to see the available choices. Operation Select to open the dialog box. Replay File dialog box allows you to choose which file(s) to be used for Replay File playback. The files listed were generated automatically during recording. Each file is identified with the time and date it was made.

  • Page 135: Recording And Exporting Processed Echo Data

    Operating procedures Recording and exporting processed echo data Topics Defining the processed data recording parameters, page 133 Recording processed data, page 134 Locating the processed data files to delete, move or copy them, page 136 Defining the processed data recording parameters The SN90 system allows you to record processed data.

  • Page 136: Recording Processed Data

    Simrad SN90 Reference Manual Select Output Observe that the dialog box opens. This dialog box contains a number of Output pages selected from the menu on the left side. Select to open the page. Processed Data to File Select an output type from the list.
  • Page 137 Operating procedures Record RAW function allows you to record the unprocessed echo data received by the Record RAW transducer. To play back data, select and then Replay mode. The Replay Operation mode allows you to play back previously recorded data. In Replay mode the SN90 system is not able to transmit ("ping").

  • Page 138: Locating The Processed Data Files To Delete, Move Or Copy Them

    Simrad SN90 Reference Manual Locating the processed data files to delete, move or copy them function provided by the SN90 system allows you to save Record Processed processed data on a selected format. You can save the data to the hard disk, or onto an external storage device.

  • Page 139: Capturing The Display Presentation In Image And Video Files

    Operating procedures Capturing the display presentation in image and video files Topics Capturing the display presentation in an image, page 137 Capturing the display presentation using one image for each ping, page 138 Choosing screen capture mode, page 139 Selecting where to save the screen captures, page 140 Accessing the screen capture images to delete, move or copy them, page 141 Capturing the display presentation in a video file, page 142 Selecting where to save the video files, page 142...

  • Page 140: Capturing The Display Presentation Using One Image For Each Ping

    Simrad SN90 Reference Manual Note Operating Panel (Mk1): Press to make a screen capture. Record Result Each screen capture you make is saved in format on the Processor Unit hard disk. .jpg Alternatively, you can use a USB flash drive or hard drive to save the screen captures.

  • Page 141: Choosing Screen Capture Mode

    Operating procedures Note Operating Panel (Mk1): Press to make a screen capture. Record Select one more time to stop the sequence. Screen Capture Result In Sequence mode a new screen capture is created for every ping. Each screen capture you make is saved in format on the Processor Unit hard disk.

  • Page 142: Selecting Where To Save The Screen Captures

    Simrad SN90 Reference Manual Procedure Open the menu. Setup Select Screen Captures Select screen capture mode. In Single mode one screen capture is taken every time you select Screen Capture on the top bar. In Sequence mode a new screen capture is created for every ping.

  • Page 143: Accessing The Screen Capture Images To Delete, Move Or Copy Them

    Operating procedures Related topics Operating procedures, page 82 Capturing the display presentation in image and video files, page 137 Screen Capture, page 301 Screen Captures dialog box, page 456 Accessing the screen capture images to delete, move or copy them When the screen capture images have been saved, you may wish to delete them, copy them, or move them to a separate storage device.

  • Page 144: Capturing The Display Presentation In A Video File

    Simrad SN90 Reference Manual Capturing the display presentation in a video file function allows you to record and save the echo presentation Screen Recording as a video file. Prerequisites Before you start video recording you must specify where to save the files. Use the Screen page to define where the video files are saved.
  • Page 145 Operating procedures Context Each screen recording you make is saved in format on the Processor Unit hard disk. .mp4 The file name reflects the current date and time. Note Video data files will normally become very large. If you wish to record large amounts of data, make sure that you have enough space on your hard disk.

  • Page 146: Setting Up Presentation Modes And Views

    Simrad SN90 Reference Manual Setting up presentation modes and views Topics Selecting which presentation modes to choose from at the bottom of the display presentation, page 144 Selecting which cursor and marker information to be shown in a view, page 145...

  • Page 147: Selecting Which Cursor And Marker Information To Be Shown In A View

    Operating procedures Select which presentation modes to choose from. Select to save the selected setting and close the dialog box. Related topics Operating procedures, page 82 Setting up presentation modes and views, page 144 Presentation Modes page, page 540 Selecting which cursor and marker information to be shown in a view It is often helpful to see information about the cursor and the active markers in the view.

  • Page 148: Moving A View To Another Display

    Simrad SN90 Reference Manual Related topics Operating procedures, page 82 Setting up presentation modes and views, page 144 Cursor Readout page, page 538 Moving a view to another display Each operating mode is presented with a set of views. These are placed at different positions with different sizes.

  • Page 149: Rearranging The Layout Of The Echo Presentations

    Operating procedures Rearranging the layout of the echo presentations Each operating mode is presented with a set of views. These are placed at different positions with different sizes. With the function you can move and re-size Docking Views the views in the display presentation. Context The physical location and size of each view can be changed individually.

  • Page 150: Restoring The Locations And Sizes Of The Views

    Simrad SN90 Reference Manual Restoring the locations and sizes of the views If you have used to rearrange the position and size of your views, you Docking Views must use to restore all the views to their default positions. User Settings...

  • Page 151: Defining The Visual Information In The Sonar Views

    Operating procedures Defining the visual information in the sonar views Topics Placing data from a sea current sensor in the sonar view, page 149 Adding markers for external objects to the echo presentation, page 150 Creating a visual presentation of your vessel’s previous movements, page 151 Placing data from a sea current sensor in the sonar view A current sensor can be connected to the SN90 system.

  • Page 152: Adding Markers For External Objects To The Echo Presentation

    Simrad SN90 Reference Manual Choose the required setting. • : Use this setting to present the direction in which the ocean current is flowing. • : Use this setting to present the direction from which the ocean current is From coming.

  • Page 153: Creating A Visual Presentation Of Your Vessel's Previous Movements

    Operating procedures Creating a visual presentation of your vessel’s previous movements In order to maintain a visual presentation of your vessel’s previous movements, you can draw these with a line. This line is drawn after the vessel symbol in the sonar views, and visualizes your past movements.

  • Page 154: Using Maps

    Simrad SN90 Reference Manual Using maps Topics Enabling and disabling the map presentation, page 152 Selecting which map elements to include in the display presentation, page 153 Setting up the presentation of the depth lines in the map, page 154...

  • Page 155: Selecting Which Map Elements To Include In The Display Presentation

    Map Display Select which map elements you want to include. Note These map settings are only valid for WMS (Web Map Service) maps from a KONGSBERG navigation system. Select to save the selected settings and close the dialog box. Related topics...

  • Page 156: Setting Up The Presentation Of The Depth Lines In The Map

    Simrad SN90 Reference Manual Setting up the presentation of the depth lines in the map Once a map service has been chosen, use to choose which map elements to Map Display include in the map presentation. The page allows you to change the safety Safety Depth depth settings, and thus the presentation of the various water depths.
  • Page 157 Map Setup Choose map provider, then insert relevant information to make the connection. Only WMS (World Map Service) maps from a KONGSBERG navigation system are supported. Type the correct URL to make contact with the map server.

  • Page 158: Defining Settings Related To User Preferences And Individual Customizing

    Simrad SN90 Reference Manual Defining settings related to user preferences and individual customizing Topics Selecting menu language, page 156 Hiding the menu system, page 157 Placing the menu on the left side of the display presentation, page 158 Selecting the information to appear on the top bar, page 158...

  • Page 159: Hiding The Menu System

    Operating procedures Select the middle of the button to open the list of available options. Language Select the language you wish to use. Result All the texts in the user interface are changed to the selected language. The context sensitive on-line help may also be available in your language. To change the language in the on-line help, you may need to restart the SN90 system.

  • Page 160: Placing The Menu On The Left Side Of The Display Presentation

    Simrad SN90 Reference Manual Related topics Operating procedures, page 82 Defining settings related to user preferences and individual customizing, page 156 Menu, page 300 Placing the menu on the left side of the display presentation The menu system is by default located on the right side of the display presentation. You can move the menu system to the left side of the presentation.The...

  • Page 161: Enabling Coordinated Universal Time (Utc) On The Bottom Bar

    Operating procedures Select Display Options Observe that the dialog box opens. Display Options Select to open the page. General In the list, select the information you want to see on the top bar. Top Bar Select to save the selected settings and close the dialog box. Related topics Operating procedures, page 82 Defining settings related to user preferences and individual customizing, page 156...

  • Page 162: Selecting Which Tooltips To Appear In The User Interface

    Simrad SN90 Reference Manual Related topics Operating procedures, page 82 Defining settings related to user preferences and individual customizing, page 156 General page, page 527 Selecting which tooltips to appear in the user interface When you move the cursor over the echoes in the display presentation, small "tooltips"...

  • Page 163: Adjusting The Backlight Intensity On The Operating Panel

    Operating procedures Adjusting the backlight intensity on the Operating Panel The buttons on the Operating Panel have a built-in backlight to improve visibility on a dark bridge. Context to control the intensity of the lights. Panel Backlight Procedure Open the menu.

  • Page 164: Increasing The Visibility Of The Information Panes

    Simrad SN90 Reference Manual Select a setting that fits your requirements. Screen Brightness To change the setting, move the cursor to either side of the button. Select the left side of the button to decrease the value. Select the right side of the button to increase the value.

  • Page 165: Changing The Colour Palette ("Skin") Used In The Display Presentations

    Operating procedures Related topics Operating procedures, page 82 Defining settings related to user preferences and individual customizing, page 156 Transparency function, page 440 Changing the colour palette ("skin") used in the display presentations Depending on the ambient light, it is possible to change the colours the SN90 system uses in its display presentation.

  • Page 166: Selecting Measurement Units

    Simrad SN90 Reference Manual strength. This implies that the next colour is selected every time the echo strength is doubled. If you choose to use many colours, the resolution of the display presentation is greatly improved. It is then easier to distinguish the difference between the various echoes of different size and/or target strength.

  • Page 167: Configuring The Environmental Parameters

    Operating procedures On the menu, select Setup Installation Observe that the dialog box opens. This dialog box contains a number Installation of pages selected from the menu on the left side. On the left side of the dialog box, select Installation Units Adjust the settings to fit your requirements.

  • Page 168: Setting Up The Alarm Limits For System Protection

    Simrad SN90 Reference Manual Related topics Operating procedures, page 82 Defining settings related to user preferences and individual customizing, page 156 Environment dialog box, page 452 Water Column page, page 541 Setting up the alarm limits for system protection Safe operation of the SN90 system is made possible using multiple sensors that monitor the operation and the performance.
  • Page 169 Operating procedures can specify a vertical position for when the transmissions start. When the transducer is retracted, transmissions will stop when the transducer reaches the same position. This functionality is only available if a hull unit has been activated in the user interface. Tx Inhibit Power The high voltage supplied to the transceiver boards is monitored.

  • Page 170: Defining The Middle Position Of The Transducer

    Simrad SN90 Reference Manual Screen Recording We recommend that you do not make any changes to these settings. Recording We recommend that you do not make any changes to these settings. At the bottom of the page, select to save your settings.
  • Page 171 Operating procedures Select the middle position carefully. The position is normally selected to place the transducer just under the keel, but low enough to prevent echoes from the trunk. Once the position is selected, make sure that the system protection functionality does not inhibit transmission.

  • Page 172: Saving, Retrieving And Handling User Settings

    Simrad SN90 Reference Manual Saving, retrieving and handling user settings Topics Saving the current user settings, page 170 Choosing previously saved user settings, page 171 Renaming existing user settings, page 172 Deleting user settings that are no longer used, page 173...

  • Page 173: Choosing Previously Saved User Settings

    Operating procedures Select to close the dialog box. Related topics Saving, retrieving and handling user settings, page 170 Choosing previously saved user settings User settings that either you or any of your colleagues have saved can easily be retrieved and put to use. This shortens down the time it takes to get started with the SN90 system. Context dialog box is used to store your favourite settings.

  • Page 174: Renaming Existing User Settings

    Simrad SN90 Reference Manual Renaming existing user settings An existing user setting can easily be renamed. Context dialog box is used to store your favourite settings. These settings can be User Settings related to different operations, environmental conditions or basic personal preferences.

  • Page 175: Deleting User Settings That Are No Longer Used

    Operating procedures Deleting user settings that are no longer used When you save the user settings, the files you have created are shown on the Saved list. The list may be too long. User settings that you do not need can be deleted. Settings Context dialog box is used to store your favourite settings.

  • Page 176: Choosing Factory Default Settings

    Simrad SN90 Reference Manual Choosing factory default settings Sometimes it may be useful to reset the SN90 system to work with a set of known user settings. A set of "factory settings" is provided for this purpose. The factory settings may be put to use if you are uncertain of which values to use.

  • Page 177: Defining The User-Selected Features On The Operating Panel

    Operating procedures Defining the user-selected features on the Operating Panel Topics Selecting which Operating Panel to use, page 175 Assigning user settings or presentation modes to the Operating Panel, page 176 Assigning functions to the rotary switches on the Operating Panel, page 178 Assigning functions to F1, F2 and F3 on the Operating Panel (Mk2), page 180 Selecting which Operating Panel to use The Operating Panel offers all necessary control functions for normal operation.

  • Page 178: Assigning User Settings Or Presentation Modes To The Operating Panel

    Simrad SN90 Reference Manual Procedure Open the menu. Setup On the menu, select Setup Installation Observe that the dialog box opens. This dialog box contains a number Installation of pages selected from the menu on the left side. On the left side of the...
  • Page 179 Operating procedures • On the Mk2 Operating Panel, the four buttons dedicated for user settings or presentation modes are located the top of the panel. • On the Mk3 Operating Panel, the requested user setting or presentation mode is chosen with a single button. Press the button repeatedly to cycle through the settings or modes.

  • Page 180: Assigning Functions To The Rotary Switches On The Operating Panel

    Simrad SN90 Reference Manual Assigning functions to the rotary switches on the Operating Panel The Mk2 Operating Panel is fitted with three rotary switches. The Mk3 Operating Panel is fitted with two rotary switches. The switches are identified with numbers. Each switch can be assigned a function related to range, gain, bearing or tilt.
  • Page 181 Operating procedures Select Operating Panel Mk2. Under , assign one function to each rotary switch on Rotary Switch Options the Operating Panel. Select Operating Panel Mk3. Under , assign one function to each rotary switch Rotary Switch Options Rotate on the Operating Panel. The assigned function is activated when you turn the rotary switch.

  • Page 182: Assigning Functions To F1, F2 And F3 On The Operating Panel (Mk2)

    Simrad SN90 Reference Manual in the view using two angular symbols. The sector and step settings are made using the function on the menu. Bearing Main Screen Recording This is an "on/off" function. The function allows you Screen Recording to record and save the echo presentation as a video file. Each screen...
  • Page 183 Operating procedures page is used to select which Operating Panel physical hardware panel you use, and to assign functionality to the programmable buttons. This page is located in the dialog box. The Installation Installation dialog box is located on the menu.
  • Page 184 Simrad SN90 Reference Manual symbols. The sector and step settings are made using the function on the Bearing menu. Main Screen Recording This is an "on/off" function. The function allows you to record Screen Recording and save the echo presentation as a video file. Each screen recording you make is saved in format on the Processor Unit hard disk.

  • Page 185: Exporting Sensor Data, Marker Positions And Technical Information

    Operating procedures Exporting sensor data, marker positions and technical information Topics Exporting target markers, page 183 Exporting sensor data to a peripheral system, page 184 Exporting technical information, page 186 Exporting target markers Under normal use, the SN90 system presents several different echoes simultaneously. Some of these are clearly more interesting than others.

  • Page 186: Exporting Sensor Data To A Peripheral System

    Simrad SN90 Reference Manual Select which marker type to export. Select to save the output format. Select to save your choices. Apply If you want to check the communication parameters, select Inspect Port Note You cannot make any changes here. To change the communication parameters, use page.
  • Page 187 Operating procedures sensor information. When activated, the selected sensor information is sent out on the chosen communication port (serial or LAN). The following sensor data can be exported: • Navigation • Motion sensor Procedure Open the menu. Setup Select Output Observe that the dialog box opens.

  • Page 188: Exporting Technical Information

    Simrad SN90 Reference Manual Exporting technical information Exporting technical information from the SN90 system to a hard disk or USB flash drive is often useful. Both during normal use, and perhaps preferably during software and hardware troubleshooting, it can be helpful to share information.

  • Page 189: Maintenance Procedures

    Maintenance procedures Maintenance procedures Topics Lowering and hoisting the transducer from the sonar room, page 188 Setting up the interfaces to peripheral devices, page 195 Inserting the installation parameters, page 214 Installing and maintaining software, page 230 Testing the noise conditions and the sonar functionality, page 252 Preventive maintenance, page 269 381294/E...

  • Page 190: Lowering And Hoisting The Transducer From The Sonar Room

    Simrad SN90 Reference Manual Lowering and hoisting the transducer from the sonar room Note A hull unit may be provided as an option. It allows you to lower and hoist the transducer. All information and tasks related to the hull unit may be disregarded and omitted if the SN90 system is installed without this unit.

  • Page 191: Lowering And Hoisting The Transducer Using The Hoist/Lower Switch

    Maintenance procedures Lowering and hoisting the transducer using the Hoist/Lower Switch The Operating Panel controls the lowering and hoisting of the transducer. Dedicated buttons are provided for the physical transducer locations. You can also do this from the Motor Control Unit. Local control is useful for maintenance purposes. Prerequisites You need a suitable screwdriver or a large coin to open the...
  • Page 192 Simrad SN90 Reference Manual Set the switch to position LOWER. Lowering is automatically stopped when the is activated. Lower Limit Switch If necessary, the transducer can be stopped in any position by setting the to STOP. Hoist/Lower Switch Set the switch to position STOP.

  • Page 193: Lowering And Hoisting The Transducer Using The Hand Crank

    Maintenance procedures Lowering and hoisting the transducer using the hand crank The Operating Panel controls the lowering and hoisting of the transducer. In case of a power failure the transducer can be hoisted or lowered manually by means of a hand crank.
  • Page 194 Simrad SN90 Reference Manual Use a spanner to open the door on the Motor Control Unit. WARNING High voltages are used. This equipment must be serviced only by qualified personnel familiar with high-voltage equipment and the potential hazards involved. Failure to observe this precaution could result in bodily injury.

  • Page 195: Emergency Lowering And Hoisting Using The Two Contactors

    Maintenance procedures Emergency lowering and hoisting using the two contactors In case of emergency it is possible to bypass the control logic in the Motor Control Unit. You can control the hoisting motor directly using the two designated contactors. Prerequisites You need a suitable screwdriver or a large coin to open the Motor Control Unit cabinet.
  • Page 196 Simrad SN90 Reference Manual Open the cabinet door. WARNING High voltages are used. This equipment must be serviced only by qualified personnel familiar with high-voltage equipment and the potential hazards involved. Failure to observe this precaution could result in bodily injury. You may be exposed to electric shock.

  • Page 197: Setting Up The Interfaces To Peripheral Devices

    Maintenance procedures Setting up the interfaces to peripheral devices Topics Installing navigation sensors and other sensors, page 195 Setting up the serial and Ethernet (LAN) port parameters, page 197 Setting up the input from a navigation system (GPS), page 198 Setting up the interface for speed log input, page 200 Setting up the interface for course gyro input, page 202 Configuring the sensor priority, page 205...
  • Page 198 Simrad SN90 Reference Manual Note Just making changes and selecting at the bottom of the page will not install anything. Select what to install, define the relevant parameters, and then select Procedure Open the menu. Setup On the menu, select...

  • Page 199: Setting Up The Serial And Ethernet (Lan) Port Parameters

    Maintenance procedures Setting up the serial and Ethernet (LAN) port parameters For any sensor interface to work, the communication parameters must be set up correctly. The SN90 software automatically scans the Processor Unit to locate and identify the available communication ports. Once the software has established a list of valid interfaces, you can set up and control the communication parameters.

  • Page 200: Setting Up The Input From A Navigation System (Gps)

    Simrad SN90 Reference Manual Set up the relevant serial or Ethernet (LAN) communication parameters. The communication parameters defined for NMEA 0183 are: • : 4800 bit/s Baud rate • Data bits • : Even Parity • Stop bits Some instruments may provide other parameters and/or options. You must always check the relevant technical documentation supplied by the manufacturer.
  • Page 201 Maintenance procedures Context page allows your SN90 system to communicate with external Sensor Installation sensors and systems. You must specify which communication port to use (LAN (Local Area Network) or serial port). You can type a custom name to identify the sensor import. In the list of valid datagram formats, select the format(s) to be accepted by the SN90 system.

  • Page 202: Setting Up The Interface For Speed Log Input

    Simrad SN90 Reference Manual 10 Select which datagram(s) you want to import from the sensor. 11 If relevant, specify a dedicated talker ID. 12 Provide the accurate physical location of the sensor (or its antenna) with reference to the vessel’s coordinate system.
  • Page 203 Maintenance procedures • You have a vacant interface port on your Processor Unit. • You are familiar with NMEA and other relevant datagram formats. • You know how to set up the parameters for serial and local area network (LAN) communication.

  • Page 204: Setting Up The Interface For Course Gyro Input

    Simrad SN90 Reference Manual Select which port you want to import the sensor information on. If you want to check the communication parameters, select Inspect Port Note You cannot make any changes here. To change the communication parameters, use the page.
  • Page 205 Maintenance procedures • You are familiar with NMEA and other relevant datagram formats. • You know how to set up the parameters for serial and local area network (LAN) communication. • The interface port is set up with the correct communication parameters. •...
  • Page 206 Simrad SN90 Reference Manual If you want to check the communication parameters, select Inspect Port Note You cannot make any changes here. To change the communication parameters, use the page. I/O Setup If you want to check that the peripheral system is transmitting data to the SN90...

  • Page 207: Configuring The Sensor Priority

    Maintenance procedures Related topics Sensor Installation page, page 564 Configuring the sensor priority With multiple sensors connected to the SN90 system, many of them will provide the same datagrams. We cannot expect that these datagrams provide the same information. page allows you to define a datagram priority, so that the Sensor Configuration information from the "most reliable"...

  • Page 208: Setting Up The Input From A Motion Reference Unit (Mru)

    Simrad SN90 Reference Manual Procedure Open the menu. Setup On the menu, select Setup Installation Observe that the dialog box opens. This dialog box contains a number Installation of pages selected from the menu on the left side. On the left side of the...
  • Page 209 Maintenance procedures • You are familiar with NMEA and other relevant datagram formats. • You know how to set up the parameters for serial and local area network (LAN) communication. • The interface port is set up with the correct communication parameters. •...
  • Page 210 Simrad SN90 Reference Manual Note If you want to use a serial line to interface the motion sensor, and no COM ports are available, you must first release a port on the page. If you choose a serial I/O Setup...

  • Page 211: Setting Up The Sn90 System For Synchronized Operation

    Maintenance procedures Related topics Motion Reference Unit page, page 571 Setting up the SN90 system for synchronized operation If you want to use the SN90 system as a master or slave in a synchronized system, you must set it up for such operation. To do this, you must select which communication port to use for the synchronization interface, and you must select the requested synchronization mode.
  • Page 212 Simrad SN90 Reference Manual On the menu, select Setup Installation Observe that the dialog box opens. This dialog box contains a number Installation of pages selected from the menu on the left side. On the left side of the dialog box, select...

  • Page 213: Setting Up Input From Buoys, Fish Aggregating Devices And Other External Objects

    Maintenance procedures Note This delay will only work when the synchronization is set up using a serial port. • Slave In Slave mode, the SN90 system waits for the delay time after the external trigger signal has arrived before transmitting the ping. This is often referred to as a post-trigger.
  • Page 214 Simrad SN90 Reference Manual system. For each relevant sensor you must insert the offset values that define the its physical location relative to the vessel’s coordinate system. Note Just making changes and selecting at the bottom of the page will not install anything.
  • Page 215 Maintenance procedures 14 Continue your work in the dialog box, or select to close it. Installation Further requirements On the left side of the dialog box, select . Define the Installation Sensor Configuration priority of the datagrams, and set up relevant configuration parameters. Related topics Sensor Installation page, page 564 381294/E...

  • Page 216: Inserting The Installation Parameters

    Simrad SN90 Reference Manual Inserting the installation parameters Topics Correct installation parameters are crucial for sonar operation, page 214 Inserting the ship origin and dimensions, page 215 Inserting the installation parameters for the transducer, page 218 Inserting the installation parameters for the motion reference unit (MRU), page 222...

  • Page 217: Inserting The Ship Origin And Dimensions

    Maintenance procedures Use the page to define the physical location of the transducer in the Transducer vessel coordinate system, as well as the installation angles (rotation). Do this as accurately as possible. Motion sensor The physical rotation of the motion reference unit (MRU) relative to the transducer is required to allow the SN90 system to adjust for roll and pitch as accurately as possible.
  • Page 218 Simrad SN90 Reference Manual • : Half the ship's length X position • : Half the ship's width Y position • : On the waterline Z position If you want to change the location of the Ship Origin, you can do this by providing offset values in the X, Y and/or Z directions.
  • Page 219 Maintenance procedures Result A common reference point for the sensors and transducer has now been established. Further requirements You must proceed by defining the locations of the navigation system antenna, the motion reference sensor, and the transducer. These locations are all referenced to the same reference point.

  • Page 220: Inserting The Installation Parameters For The Transducer

    Simrad SN90 Reference Manual Inserting the installation parameters for the transducer The physical location and the installation angles of the transducer are critical for the echo data accuracy. Incorrect angles will greatly reduce the data accuracy. A hull unit may be provided as an option. It allows you to lower and hoist the transducer. When the installation trunk is mounted, it may not be positioned with the mounting holes perfectly aligned to the centre line of the vessel.
  • Page 221 Maintenance procedures Note It is very important that the transducer installation angles are measured and recorded accurately during the installation. Incorrect angles will greatly reduce the data accuracy. In order to visualize the process of finding the installation angles, observe these three examples.
  • Page 222 Simrad SN90 Reference Manual Used for purse seine with the gear on the port side, the transducer must be pointed approximately -90 degrees towards port (or 270 degrees towards starboard which puts you in the same direction) with the indicator arrow pointing up. To set the angles correctly, observe this exercise.
  • Page 223 Maintenance procedures Illustration: Rotation around the x-axis: In the positive horizontal direction (forward), a positive rotation is clockwise. Rotation around the y-axis: In the positive horizontal direction (starboard), a positive rotation is clockwise. Rotation around the z-axis: In the positive vertical direction (down), a positive rotation is clockwise.

  • Page 224: Inserting The Installation Parameters For The Motion Reference Unit (Mru)

    Simrad SN90 Reference Manual : Specify an angle (in degrees) to compensate for any Rotation Around X deviation from the X axis (fore-and-aft direction) in the vessel coordinate system. If the transducer is properly installed without unintentional skew, this angle can be set to 0 degrees.
  • Page 225 Correct values for motion sensor rotation are critical for the sonar performance. The motion sensor offset values (its physical location relative to the vessels' coordinate system) are not important for sonar operation. The Kongsberg Seapath ® - and other GPS systems - allow you to define the MRU location in the positioning system.
  • Page 226 Simrad SN90 Reference Manual Rotation around the x-axis: In the positive horizontal direction (forward), a positive rotation is clockwise. Rotation around the y-axis: In the positive horizontal direction (starboard), a positive rotation is clockwise. Rotation around the z-axis: In the positive vertical direction (down), a positive rotation is clockwise.

  • Page 227: Adjusting The Built-In Motion Sensor Offset

    Maintenance procedures Related topics MRU (Motion Reference Unit) page, page 579 Adjusting the built-in motion sensor offset The information from a motion reference unit (MRU) (normally heave, roll and pitch information) is imported into the SN90 system to increase the accuracy of the echo data.
  • Page 228 Simrad SN90 Reference Manual • If the 0° reference mark for the built-in motion sensor points to the starboard (right) side of the vessel’s centre line (as shown in the illustration), insert the offset as a number between 0 and +180 degrees.

  • Page 229: Adjusting The Stabilization Offsets For The External Motion Sensor

    Maintenance procedures Continue your work in the dialog box, or select to close it. Installation Related topics MRU (Motion Reference Unit) page, page 579 Adjusting the stabilization offsets for the external motion sensor If your SN90 system is installed with a hull unit, it is also provided with a built-in motion sensor to provide electronic stabilization of the sonar beams.
  • Page 230 Simrad SN90 Reference Manual Note Do not confuse stabilization offset with installation offset. The installation offset values describe the physical location and orientation of an item, and how this location is related to the vessel's coordinate system. The stabilization offset values describe any misalignments related to the measurements a sensor make.
  • Page 231 Maintenance procedures Open the function. Stabilization Adjust the settings. Roll Offset Pitch Offset Select [—] on the left side to decrease the value, or select [+] on the right side to increase. 381294/E...

  • Page 232: Installing And Maintaining Software

    Simrad SN90 Reference Manual Installing and maintaining software Topics Installing a new version of the operating software, page 230 Removing the operating software, page 231 Updating the online help system, page 233 Adding online help in a new language, page 234...

  • Page 233: Removing The Operating Software

    Maintenance procedures Download the new software version. Unpack the ZIP file to access the executable application file. Copy the application file to a USB flash drive. Turn on the Processor Unit. Make the following preparations. If applicable: Connect the keyboard and the mouse to USB sockets on the Processor Unit.
  • Page 234 Simrad SN90 Reference Manual Note The software release note may contain additional details related to the software removal. Context Removal of the software is done using functionality provided by the operating system. Procedure Turn on the Processor Unit. Select to turn off the system.

  • Page 235: Updating The Online Help System

    Procedure Obtain the new help file. Download the help file from our website to a local computer. • https://www.kongsberg.com/sn90 Unpack the ZIP file, and place all the files in a folder named HTML Copy the folder to a USB flash drive.

  • Page 236: Adding Online Help In A New Language

    Simrad SN90 Reference Manual In the dialog box, select to close the SN90 Power Off Exit to Operating System program. From the Windows ® button, right-click to open File Explorer. Start Navigate to the folder with the on-line help files.
  • Page 237 Procedure Obtain the new help file. Download the help file from our website to a local computer. • https://www.kongsberg.com/sn90 Unpack the ZIP file, and place all the files in a folder named HTML Copy the folder to a USB flash drive.

  • Page 238: Obtaining And Installing A Software License For Additional Functionality

    Simrad SN90 Reference Manual Obtaining and installing a software license for additional functionality The SN90 system does not need any software licenses to operate. However, specific software license codes "unlocks" additional functionality. Context The software license is a 32 character hexadecimal string based on the hardware identifier ( ).

  • Page 239: Setting Up The Operating Panel (Mk2)

    Maintenance procedures Send the information to one of our dealers or distributors. You can also use the request form on our website, or contact our support department directly. You can use the following e-mail address: • purchase.order@simrad.com Once the software license string(s) have been returned to you (most likely by e-mail), you can install the licenses into the software.
  • Page 240 Simrad SN90 Reference Manual • SN90 (Purse seine installations) 157.237.60.20 AC:1F:6B:1D:42:E6 • SN90 (Trawl installations) 157.237.60.11 1F:33:9C:23:A3:65 To set up the Ethernet communication, you must define the IP address for the panel, and identify the Processor Unit in the panel software. These settings allow you to use more than one Operating Panel on the Processor Unit.
  • Page 241 Maintenance procedures On the list of connections, select , and then Internet Protocol 4 (TCP/IPv4) Properties Observe the IP address for the Ethernet adapter. Write down the information. Close all the dialog boxes. Obtain the MAC address. In the bottom left corner of your desktop, select the looking glass to start a search.

  • Page 242: Using More Than One Operating Panel To Control The Sonar (Mk2)

    Simrad SN90 Reference Manual Select on the top menu to open the page. SOP Configuration Observe the default values. If you wish to keep these default values, do nothing. The default values are well suited if you have one single panel communicating with one single Processor Unit.
  • Page 243 Maintenance procedures • Ethernet switch Make sure that your selected Ethernet switch has a large bandwidth capacity. Minimum 1 Gb (1000BASE-T) is required. • Ethernet cables It is very important that high-quality Ethernet cables are used. You must use Cat 5e STP (Shielded Twisted Pair) quality or better. Neither tools nor instruments are required.
  • Page 244 Simrad SN90 Reference Manual Connect the power cable from the Ethernet switch to the AC power outlet. Do not connect the Operating Panel to the Ethernet switch. Ethernet cables An Ethernet switch connected to ETH1 on the rear side of the Processor Unit can also be used to interface other peripheral systems such as echo sounders and positioning systems.
  • Page 245 Maintenance procedures Note Each Operating Panel must have a different IP Address. None of the panels must use the default IP Address. Select Apply IP Configuration When the new IP Address has been set in the Operating Panel, you will loose contact with the configuration page.

  • Page 246: Using A Single Operating Panel To Control More Than One Sonar (Mk2)

    Simrad SN90 Reference Manual Type or copy the IP address into the relevant box. Obtain the MAC address. Type or copy the MAC address into the relevant box. Select ADD Sonar PC Observe that your Processor Unit is added to the list.
  • Page 247 Maintenance procedures • SN90 (Purse seine installations) 157.237.60.20 AC:1F:6B:1D:42:E6 • SN90 (Trawl installations) 157.237.60.11 1F:33:9C:23:A3:65 The IP and MAC addresses for your Processor Unit are contained in a text file named . The file contains the product name, IP address and MAC address IPandMACaddress.txt in the following format (example): SN90...
  • Page 248 Simrad SN90 Reference Manual Ethernet cables An Ethernet switch connected to ETH1 on the rear side of the Processor Unit can also be used to interface other peripheral systems such as echo sounders and positioning systems. You can also connect the Olex system to the SN90 system using this Ethernet switch.
  • Page 249 Maintenance procedures Observe that the dialog box opens. Windows Settings Select Network & Internet Select Change adapter options Select the relevant network adapter, then right-click and select Properties the short-cut menu. On the list of connections, select , and then Internet Protocol 4 (TCP/IPv4) Properties Observe the IP address for the Ethernet adapter.

  • Page 250: Updating The Operating Panel Support Applications (Mk2)

    Simrad SN90 Reference Manual Press on the Operating Panel. Sonar Select Make sure that you can control the cursor, and that you can make selections in the menu system. Press and/or turn selected buttons, and make sure that the corresponding function is activated in the user interface.
  • Page 251 Maintenance procedures Unpack the ZIP file to access the executable application file. Copy the application file to a USB flash drive. Make the following preparations. If applicable: Connect the keyboard and the mouse to USB sockets on the Processor Unit. Insert the USB flash drive.

  • Page 252: Updating The Firmware On The Operating Panel (Mk2)

    Simrad SN90 Reference Manual Updating the firmware on the Operating Panel (Mk2) Whenever required the firmware in the Operating Panel can be updated to include new functionality or to correct software errors. Prerequisites The Operating Panel is installed as specified in the Installation manual. The Processor Unit is turned on.
  • Page 253 Maintenance procedures In the browser address field, type: http://157.237.60.20:5000 Note If you have previously changed the IP Address on the Operating Panel, you must use this address to open the configuration page. If you use the Processor Unit: Select to turn off the system. Power off In the dialog box, select...

  • Page 254: Testing The Noise Conditions And The Sonar Functionality

    Simrad SN90 Reference Manual Testing the noise conditions and the sonar functionality Topics Checking the status of the transceiver boards, page 252 Checking the transducer by means of the Diagnostics functionality, page 254 Measuring the noise in passive mode, page 258...
  • Page 255 Maintenance procedures • : This is an alarm. A closer investigation is required. • : A device monitored by the diagnostic system is disabled. Blue • : No information is available. Grey dialog box and functionality is only provided for performance Diagnostics monitoring.

  • Page 256: Checking The Transducer By Means Of The Diagnostics Functionality

    Simrad SN90 Reference Manual Select to open the page. Transceiver page provides a graphic presentation of the transceiver boards. The Transceiver visual presentation reflects the physical location of the boards in the Transceiver Unit. Only static information is provided. The...
  • Page 257 Maintenance procedures • If applicable: The transducer is retracted to its upper position. • The vessel is berthed or at sea. We recommend that the test is done with the vessel at sea. Caution You must never set the SN90 system to ping unless the transducer is submerged in water.
  • Page 258 Simrad SN90 Reference Manual Select the default settings. On the menu, select Main User Settings Observe the list. Factory Settings Select the setting you want to use. Select Activate Selected Setting Select to apply your changes and close the dialog box.
  • Page 259 Maintenance procedures important factor in the cost/benefit assessment is whether you need to replace the transducer, or just a single transceiver board. If more than 3% of your transducer elements have failed, we recommend that you contact your dealer for advice. Note For further investigations of this issue, use the functionality offered by the Element...

  • Page 260: Measuring The Noise In Passive Mode

    Simrad SN90 Reference Manual Measuring the noise in passive mode Low noise is a key factor for high quality and reliable measurements. The performance of the SN90 system will always be limited by different noise sources. A high noise level will mask the echoes and make them difficult to read and interpret.
  • Page 261 Maintenance procedures For example, if is set to 75 degrees, set to (90-75) 15 degrees. Rotation around Y Tilt • To choose the correct bearing, observe the value. Check the Rotation around Z installation parameters. Set to the same value as Bearing Rotation around Z For example, if the transducer is mounted on the starboard side of the vessel with...

  • Page 262: Making A Noise/Speed Curve To Determine Vessel Noise

    Simrad SN90 Reference Manual to Off. Noise Filter Set the to Off. Bottom Filter Threshold On the menu: Select to open the dialog box. Setup Diagnostics Select to open the page. Noise Select Start Noise Measurements Observe the noise curve.
  • Page 263 Maintenance procedures • There must be no other vessels in the vicinity. • As much machinery as possible must be turned off. It is particularly important to turn off electrical motors, as well as cooling systems and hydraulic pumps that may cause electric noise.
  • Page 264 Simrad SN90 Reference Manual Illustration: Read the noise value from the noise circle. Use the mean value of the readouts at 0 degrees (straight up). Procedure If applicable: Make sure that you have sufficient water depth below the keel before you lower the transducer.
  • Page 265 Maintenance procedures Read the noise value from the noise circle. Record the values in the result table. Repeat for every 2 kHz up to and including the highest test frequency: 120 kHz Increase the operating frequency with 2 KHz. Read the noise value from the noise circle. Record the values in the result table.

  • Page 266: Measuring Flow Noise

    Simrad SN90 Reference Manual Speed/Frequency/Noise Speed Frequency Noise level Sea state: Water depth: Use this table to record the values. Print it out and make multiple copies. Alternatively, you can type the values straight into a spreadsheet. Related topics Noise page, page 552...
  • Page 267 Maintenance procedures • There must be no other vessels in the vicinity. • The vessel must lie still in the water. • As much machinery as possible must be turned off. It is particularly important to turn off electrical motors, as well as cooling systems and hydraulic pumps that may cause electric noise.
  • Page 268 Simrad SN90 Reference Manual Illustration: Read the noise value from the noise circle. Use the mean value of the readouts at 0 degrees (straight up). Procedure If applicable: Make sure that you have sufficient water depth below the keel before you lower the transducer.
  • Page 269 Maintenance procedures Ask the bridge to abruptly turn off all engine power and - if possible - change the pitch of the propellers to zero. Read the noise value from the noise circle. For every knot the speed is reduced, read the noise. (If you find it more convenient, type the data directly into the spreadsheet.) Fill in the result table.
  • Page 270 Simrad SN90 Reference Manual Speed/Frequency/Noise Speed Frequency Noise level Sea state: Water depth: Use this table to record the values. Print it out and make multiple copies. Alternatively, you can type the values straight into a spreadsheet. Related topics Noise page, page 552...

  • Page 271: Preventive Maintenance

    Maintenance procedures Preventive maintenance Topics Preventive maintenance schedule, page 270 Requirements for personnel and tools, page 272 Approved anti-fouling paints, page 272 Preventive maintenance procedures, page 273 Accessing the inside of the installation trunk, page 288 381294/E...

  • Page 272: Preventive Maintenance Schedule

    Simrad SN90 Reference Manual Preventive maintenance schedule In order to secure a long and trouble-free operation of the SN90 system, certain specific preventive maintenance tasks must be done. The tasks are organized in a preventive maintenance schedule. Note Even though a preventive maintenance schedule is provided, the SN90 system must be inspected regularly.
  • Page 273 Maintenance procedures Inspect and clean the Transceiver Unit. Inspect the Hull Unit. (if applicable) A hull unit may be provided as an option. It allows you to lower and hoist the transducer. All information and tasks related to the hull unit may be disregarded and omitted if the SN90 system is installed without this unit.

  • Page 274: Requirements For Personnel And Tools

    Simrad SN90 Reference Manual Requirements for personnel and tools All tasks can be done by the crew. There is no need for neither technical education nor specific maintenance training. Unless specified in a procedure you will not need any special tools or equipment.

  • Page 275: Preventive Maintenance Procedures

    Maintenance procedures Preventive maintenance procedures Topics Checking the environmental conditions in the sonar room, page 273 Inspecting and cleaning the display, page 274 Inspecting and cleaning the Processor Unit, page 274 Inspecting and cleaning the Operating Panel, page 275 Inspecting and cleaning the Transceiver Unit, page 275 Visual inspection of the hull unit, page 276 Visual inspection of the installation trunk, page 277 Inspecting and cleaning the transducer face, page 278...

  • Page 276: Inspecting And Cleaning The Display

    Simrad SN90 Reference Manual Inspecting and cleaning the display To ensure long and trouble-free operation of the display, it must be inspected and cleaned at regular intervals. Prerequisites No special tools are required for this task. You will however need a commercially available mild detergent and a lint free cloth.

  • Page 277: Inspecting And Cleaning The Operating Panel

    Maintenance procedures Remove dust and salt water residue with a soft cloth moistened in fresh water. Use a mild detergent. Note Do not use strong solvents. Inspecting and cleaning the Operating Panel To ensure long and trouble-free operation of the Operating Panel it must be inspected and cleaned at regular intervals.

  • Page 278: Visual Inspection Of The Hull Unit

    Simrad SN90 Reference Manual Make sure that the unit is not exposed to excessive dust and vibrations. Check for physical damage to the cabinet and/or the cables. Remove dust and salt water residue with a soft cloth moistened in fresh water.

  • Page 279: Visual Inspection Of The Installation Trunk

    Maintenance procedures [Bridge]: Lower the transducer to its bottom position. Make sure that the transducer can be lowered and hoisted without complications or obstacles. Make sure that the transducer cables can move freely when the transducer is lowered and hoisted. [Bridge]: Hoist the transducer to its upper position.

  • Page 280: Inspecting And Cleaning The Transducer Face

    Simrad SN90 Reference Manual Cover the opening in the installation trunk with a solid wooden or steel plate to protect the transducer. Do a close visual inspection of the blister and the hull plating close to the installation trunk. Remove marine growth.
  • Page 281 Maintenance procedures • One person must stay in the sonar room to operate the hull unit. • One person must stay in the dry dock, under the hull, to make sure that the transducer is not lowered too far down. Proper oral communication must exist between the sonar room and the dry dock personnel.
  • Page 282 Simrad SN90 Reference Manual Use a spanner to open the door on the Motor Control Unit. WARNING High voltages are used. This equipment must be serviced only by qualified personnel familiar with high-voltage equipment and the potential hazards involved. Failure to observe this precaution could result in bodily injury.

  • Page 283: Painting The Transducer Face

    Maintenance procedures Loosen the brake release screw to engage the motor brake. Check with the hand crank to ensure that the motor brake is engaged. Remove the hand crank from the stub shaft, and mount it in its storage position in the Motor Control Unit.
  • Page 284 The use of anti-fouling paint will reduce the acoustical performance of the transducer. The properties of the transducer face combined with the thickness of the anti-fouling paint can also affect the overall performance. Kongsberg Discovery cannot be held responsible for any negative consequences of the anti-fouling paint.
  • Page 285 Maintenance procedures Remove the hand crank from its storage position. Remove the plastic plug on the top cover of the hull unit. Mount the hand crank onto the stub shaft through the hole in the top cover. Locate the brake release screw on the motor. Use an 4 mm Allen key to rotate the screw clockwise until the motor brake is released.

  • Page 286: Inspecting And Replacing Sacrificial Anodes

    If the sacrificial anodes need to be replaced, you will need the necessary spare items as well as mounting materials. Contact your local dealer or distributor, or the Kongsberg Discovery support organization, for spare parts. • : 629-204660 Kongsberg Discovery part number •...

  • Page 287: Lubricating The Hoisting Spindle

    Manufacturer’s website • : 654‑078793 Kongsberg Discovery part number Context The hull unit was lubricated as a part of the production process. It was thus provided fully lubricated when delivered to the vessel. During normal conditions, the lubricant applied will last for a long period of time. Additional lubrication of the hull unit must only take place when required.

  • Page 288: Lubricating The Transducer Shaft Sleeve

    Simrad SN90 Reference Manual Procedure Inspect the ball bearings on the top and the bottom of the hoisting spindle. Inspect the hoisting spindle. Consider whether it is necessary to lubricate the hoisting spindle. Apply a thin layer of lubricant if required.
  • Page 289 Maintenance procedures A hull unit may be provided as an option. It allows you to lower and hoist the transducer. All information and tasks related to the hull unit may be disregarded and omitted if the SN90 system is installed without this unit. Procedure Inspect the hull unit for water intrusion.

  • Page 290: Accessing The Inside Of The Installation Trunk

    Simrad SN90 Reference Manual Accessing the inside of the installation trunk Topics Accessing the installation trunk by lowering the transducer, page 288 Accessing the installation trunk by lifting the hull unit, page 290 Accessing the installation trunk by lowering the transducer To do a visual inspection of the inside surface of the installation trunk you need access.
  • Page 291 Maintenance procedures that neither this coating nor the internal parts of the transducer are damaged during the handling, installation or cleaning. Any holes and/or scratches in the transducer surface will allow water to penetrate the transducer. If a leak occurs, the transducer must be replaced.
  • Page 292 Simrad SN90 Reference Manual Locate the hand crank inside the Motor Control Unit. Remove the hand crank from its storage position. Remove the plastic plug on the top cover of the hull unit. Mount the hand crank onto the stub shaft through the hole in the top cover.
  • Page 293 Maintenance procedures Note A hull unit may be provided as an option. It allows you to lower and hoist the transducer. All information and tasks related to the hull unit and installation trunk may be disregarded and omitted if the SN90 system is installed without a hull unit. Context The upper parts of the hull unit include the mechanical gantry, the hoist motor, the hoisting spindle and the Motor Control Unit.
  • Page 294 Simrad SN90 Reference Manual Fasten the lifting tackle to the two lifting eye bolts on either side of the top of the gantry. Note Make sure that you use the correct lifting eyes! There are two lifting eyes on each side of the hull unit.
  • Page 295 Maintenance procedures Note If you suspect that the gasket is damaged, replace it. If the gasket has been contaminated with dirt, grease or lubricants, it must be replaced. Lower the hull unit carefully onto the installation trunk. Important The transducer is covered with a thick red or black protective coating made of a special plastic type.

  • Page 296: User Interface

    Simrad SN90 Reference Manual User interface Topics User interface familiarization, page 295 Top bar, page 297 Replay bar description, page 314 Sonar views, page 316 Using markers in the SN90 user interface, page 346 Using target and position tracking, page 358...

  • Page 297: User Interface Familiarization

    User interface User interface familiarization By default, the display presentation covers the entire screen. The display presentation provided by the SN90 system consists of specific visual elements that work together. The visual elements provide you with the echo information you need, they help you to control the functionality needed to understand this information, and finally, they allow you to control the operational parameters.
  • Page 298 Simrad SN90 Reference Manual Information panes The SN90 system offers several information panes to provide additional and detailed data from the presentations. The information panes are opened and closed from the top bar. You can change the appearance of the information panes to suit your preferences.

  • Page 299: Top Bar

    User interface Top bar Topics Top bar overview, page 297 Logo and product name, page 299 Menu, page 300 Screen Recording, page 300 Screen Capture, page 301 Record, page 302 Hull Unit, page 304 Information panes overview, page 305 Navigational information, page 307 Messages, page 311 Help, page 311 Operating system functions, page 312...
  • Page 300 Simrad SN90 Reference Manual Screen Recording function allows you to record and save the echo presentation Screen Recording as a video file. Select on the top bar to start and stop the recording. Screen Recording Screen Capture Select to make a copy of the entire display presentation.

  • Page 301: Logo And Product Name

    User interface Sensor read–outs These fields are separate read-outs. They present information related to the navigation of the vessel and operation of the SN90 system. Messages By flashing, shows you that the SN90 system has issued a message. The Messages colour of the triangle reflects the severity of the most serious message.

  • Page 302: Menu

    Simrad SN90 Reference Manual Menu is located on the left side of the top bar. This is an "on/off" function. Menu Description Unless you need to make frequent changes to the operating parameters, you may want to hide the menu from the display presentation. This gives you more space for echo information.

  • Page 303: Screen Capture

    User interface Note Video data files will normally become very large. If you wish to record large amounts of data, make sure that you have enough space on your hard disk. Unless your Processor Unit is equipped with a very large disk, we recommend that you save the data to an external storage device.

  • Page 304: Record

    Simrad SN90 Reference Manual Select to make a copy of the entire display presentation. Each screen Screen Capture capture you make is saved in format on the Processor Unit hard disk. .jpg Related functionality Screen Captures dialog box You can choose either a single screen capture or a sequence with multiple screen captures.
  • Page 305 User interface Related functionality Replay bar During replay, the dedicated replay bar is shown immediately under the top bar. The replay bar allows you to retrieve saved files, and to control the playback. Record RAW function button allows you to start and stop recording, split the current Record RAW recording file (if it gets too large), and set up the file output parameters.

  • Page 306: Hull Unit

    Simrad SN90 Reference Manual Hull Unit is located on the left side of the top bar. Select it to open the Hull Unit Hull Unit Control dialog box. Note A hull unit may be provided as an option. It allows you to lower and hoist the transducer.

  • Page 307: Information Panes Overview

    User interface Information panes overview The SN90 system offers several information panes to provide additional and detailed data from the presentations. The information panes are opened and closed from the top bar. The information panes are only available when an Inspection view is "active". Before you open an information pane, you must first click in an Inspection view to make it "active".
  • Page 308 Simrad SN90 Reference Manual shown as a dotted rectangle in the view. You can change the size of the zoomed area, and you can move the rectangle anywhere inside the active view. Related topics User interface, page 294 Top bar, page 297...

  • Page 309: Navigational Information

    User interface Navigational information The navigational information is located in the middle of the top bar. To choose which information to be displayed on the top bar, use the functions in the Top Bar Display dialog box. The dialog box is located on the menu.
  • Page 310 Simrad SN90 Reference Manual Description If a positioning sensor (GPS) is connected to the SN90 system, the top bar can show you the vessel's geographical position in longitude and latitude. Note The information shown on the top bar must not be used for vessel navigation.
  • Page 311 User interface priority, so that the information from the "most reliable" sensor is used by the SN90 system. You can also define manual values in case a sensor is unserviceable, or not installed. Related topics User interface, page 294 Top bar, page 297 General page, page 527 Speed read-out When enabled, the vessel’s current speed is shown on the top bar.
  • Page 312 Simrad SN90 Reference Manual Bottom Depth read-out If enabled, the current water depth under the vessel is shown on the top bar. Prerequisites To see this information on the top bar, you must enable it by using the functions Top Bar in the dialog box.

  • Page 313: Messages

    User interface Description If a suitable motion reference unit (MRU) sensor is connected to the SN90 system, the top bar can show you the vessel's current movements. The roll and pitch information is always shown in degrees. Related topics User interface, page 294 Top bar, page 297 General page, page 527 Messages...

  • Page 314: Operating System Functions

    Simrad SN90 Reference Manual Description Select this button to open the context sensitive on-line help. The help system opens on its start page. To navigate in the help file, use the menu system on the left side and the interactive links within the publication.
  • Page 315 User interface hull unit may be provided as an option. It allows you to lower and hoist the transducer.) Exit to Operating System closes the SN90 program. Exit to Operation System Related topics User interface, page 294 Top bar, page 297 Power Off dialog box, page 508 381294/E...

  • Page 316: Replay Bar Description

    Simrad SN90 Reference Manual Replay bar description During replay, the dedicated replay bar is shown immediately under the top bar. The replay bar allows you to retrieve saved files, and to control the playback. How to open is set to Replay.
  • Page 317 User interface the recording parameters have been defined, you can start recording by clicking the red circle on the button, and stop it by clicking the left rectangle. Record RAW located on the menu. Operation 381294/E...

  • Page 318: Sonar Views

    Simrad SN90 Reference Manual Sonar views Topics Presentation modes, page 317 Horizontal view, page 318 Vertical view, page 327 Inspection view, page 334 Plane view, page 338 381294/E...

  • Page 319: Presentation Modes

    User interface Presentation modes All echoes offered by the SN90 system are shown in rectangular views. Combinations of these views are organized in presentation modes. Each presentation mode offered by the SN90 system provides a selection of views in a predefined pattern. You must first find the presentation mode that meets your operational requirements, then you can change the size of the individual views.

  • Page 320: Horizontal View

    Simrad SN90 Reference Manual Horizontal view The Horizontal view in the SN90 display presentation covers the entire sector of 160 degrees. The current bearing is shown with a solid line pointing out from the vessel position. To activate the Horizontal view, select a suitable presentation mode on the bottom bar, then click inside the view.
  • Page 321 User interface To fully understand how the beams behave in this view, use the dialog Beam Visualization box. This dialog box is opened from the menu. Setup menu controls which "cosmetic" features that used. Cosmetics menu controls which graphical elements that are shown in the Visual Objects different views.
  • Page 322 Simrad SN90 Reference Manual Bearing The current bearing is shown with a solid line pointing out from the vessel position. You can change the angle by means of the function on the menu. You can also Bearing Main select the bearing line and drag it sideways.
  • Page 323 User interface Compass cards Activate to place evenly spaced compass markers on the outer range Compass Cards ring in horizontal views. The compass markers rotate based in the inputs from a navigation sensor. An update takes place when the vessel heading changes more than 1 degree. Related topics User interface, page 294 Sonar views, page 316...
  • Page 324 Simrad SN90 Reference Manual Cursor The position (bearing and distance) and depth of the cursor's location is shown in the lower right corner of the view. The depth is calculated from the current tilt and the distance from the vessel.
  • Page 325 User interface Certain presentation modes place the Inspection and Horizontal views together. When three Inspection views are open, the Horizontal view presents three different bearing lines. Three dotted bearing lines identify the bearing and the selected range of the inspection beams. To change the bearing of an Inspection view: •...
  • Page 326 Simrad SN90 Reference Manual Markers One or more markers can be placed in the view to identify specific echoes. Markers are shown as small triangles. Once an echo has been provided with a marker in the display presentation it is regarded as an object.
  • Page 327 User interface Related topics User interface, page 294 Sonar views, page 316 Horizontal view, page 318 Range / Range Rings / Variable Range Ring The distance from the vessel symbol in the centre of the circle to the outer ring corresponds to the currently selected range.
  • Page 328 Simrad SN90 Reference Manual Tilt The current settings for range, gain and tilt are shown in the upper left corner of the view. Click on the text to make it larger. Click one more time to restore the original font size.

  • Page 329: Vertical View

    User interface Vertical view The Vertical view is oriented perpendicularly to the horizontal plane. The Vertical view shows you a "vertical slice" of the echo data. The direction of the vertical slice is indicated and controlled by the bearing line in the Horizontal view. The area covered by the vertical beam is shown as a triangle in the Horizontal view.
  • Page 330 Simrad SN90 Reference Manual To fully understand how the beams behave in this view, use the dialog Beam Visualization box. This dialog box is opened from the menu. Setup menu controls which "cosmetic" features that used. Cosmetics menu controls which graphical elements that are shown in the Visual Objects different views.
  • Page 331 User interface If you use a presentation mode with two vertical views you can set the function Bearing to two different values. Both bearing lines are shown in the Horizontal view. The bearing for the Vertical view is shown with a solid line. The bearing for the Vertical 2 view is shown with a dotted line.
  • Page 332 Simrad SN90 Reference Manual Related topics User interface, page 294 Sonar views, page 316 Vertical view, page 327 Horizontal TX Sector / Vertical TX Sector function controls the "width" of the transmission. The Horizontal Tx Sector Vertical function is used to change the vertical opening angle in horizontal and vertical Tx Sector swaths.
  • Page 333 User interface Coverage plot In the Vertical view, use to visualize the area covered by the horizontal Coverage Plot beam. Two border lines are added to the Vertical view presentation to indicate the size of the area. Use the function in the Horizontal view to control the vertical search Vertical Tx Sector sector's opening angle.
  • Page 334 Simrad SN90 Reference Manual Markers One or more markers can be placed in the view to identify specific echoes. Markers are shown as small triangles. Once an echo has been provided with a marker in the display presentation it is regarded as an object.
  • Page 335 User interface Purse depth A line of X’es in the vertical views shows the bottom of the purse seine. on the menu to toggle this line On or Off. Purse Depth Cosmetics Related topics User interface, page 294 Sonar views, page 316 Vertical view, page 327 Vertical Reference During operations in a vertical view you may wish to focus on the echoes in the upper or...

  • Page 336: Inspection View

    Simrad SN90 Reference Manual Inspection view The SN90 system offers several inspection beams. Each inspection beam is presented using an Inspection view. The opening angle of the inspection beams depend on the operating frequency. If you use several Inspection views, you can train and tilt the beams individually, and independent of the beams displayed in the other views.
  • Page 337 User interface adjustable direction. In the SN90 system we use the phrase echogram to describe the information provided by the view. Before you can change the settings related to a view, the view must be active. To activate a view, click in it. The active view is identified with a thicker border. To fully understand how the beams behave in this view, use the dialog Beam Visualization...
  • Page 338 Simrad SN90 Reference Manual Tilt The echo data is taken from the current bearing and tilt. The current tilt is shown with a solid line in the Vertical view. You can change the tilt angle by means of the function on the menu.
  • Page 339 User interface Tooltips When you move the cursor over the echo data in the Echogram and Inspection views, small "tooltips" are shown to provide additional information. Several tooltips can be shown in the sonar presentation. When a tooltip is enabled, the cursor location is detected and a small information box is shown.

  • Page 340: Plane View

    Simrad SN90 Reference Manual Plane view The Plane view presents the echo data in a horizontal sector ("fan"). The sector direction can be changed in both vertical and horizontal directions. • • The current tilt is shown with dotted lines in the view. Two types of dotted lines are used to distinguish between port and starboard side of the sector.
  • Page 341 User interface To fully understand how the beams behave in this view, use the dialog Beam Visualization box. This dialog box is opened from the menu. Setup menu controls which "cosmetic" features that used. Cosmetics menu controls which graphical elements that are shown in the Visual Objects different views.
  • Page 342 Simrad SN90 Reference Manual Cursor The position (bearing and distance) and depth of the cursor's location is shown in the lower right corner of the view. The depth is calculated from the current tilt and the distance from the vessel.
  • Page 343 User interface Related topics User interface, page 294 Sonar views, page 316 Plane view, page 338 Inspection views The SN90 system offers five inspection beams. Each inspection beam is presented using an Inspection view. If you use several Inspection views, you can train and tilt the beams individually, and independent of the beams displayed in the other views.
  • Page 344 Simrad SN90 Reference Manual Inspection views: Bearing Plane view: Bearing Range rings The position (bearing and distance) and depth of the cursor's location is shown in the lower right corner of the view. The current settings for range, gain and tilt are show in the lower left corner of the view.
  • Page 345 User interface Related topics User interface, page 294 Sonar views, page 316 Plane view, page 338 Markers / Manual Track / Priority Marker One or more markers can be placed in the view to identify specific echoes. Markers are shown as small triangles. Once an echo has been provided with a marker in the display presentation it is regarded as an object.
  • Page 346 Simrad SN90 Reference Manual You can start manual tracking by placing multiple markers on a target echo that moves in the view. You can see the latest marker's course and speed in the view's lower right corner. The values are calculated based on the last two markers you created and the time between them.
  • Page 347 User interface When you change the tilt a dotted line presents the requested tilt while the solid line presents the actual tilt. You can change the tilt angle by means of the function on the Tilt menu. You can also click on the tilt line in a Vertical view and drag it up and down. Main Related topics User interface, page 294...

  • Page 348: Using Markers In The Sn90 User Interface

    Simrad SN90 Reference Manual Using markers in the SN90 user interface Under normal use, the SN90 system presents several different echoes simultaneously. Some of these are clearly more interesting than others. It can be a challenging task to tell these echoes apart. It can also be hard to keep track of the different echoes as both echoes and your own vessel move.

  • Page 349: Place Marker

    User interface Place Marker function allows you to create a marker at the current position of the Place Marker cursor. Each marker is shown as a small triangle with or without a short identifying label. You can also place a marker by pressing the button on the Operating Panel.
  • Page 350 Simrad SN90 Reference Manual You can delete a single marker, or multiple markers simultaneously, by selecting Delete in the menu. If you use on the shortcut menu you can only remove Objects Delete Marker one marker at a time. Place the cursor on the marker you wish to delete.
  • Page 351 User interface There are two ways to give a marker priority status. Place the cursor on the marker you wish to give priority status. Right-click to open the shortcut menu. Select Set Priority Marker Open the menu. Objects In the object list, select the object line to activate the control buttons for that particular object.

  • Page 352: Target Markers

    Simrad SN90 Reference Manual Manual tracking You can start manual tracking by placing multiple markers on a target echo that moves in the view. You can see the latest marker's course and speed in the view's lower right corner. The values are calculated based on the last two markers you created and the time between them.
  • Page 353 User interface Note If you change the tilt or bearing settings manually the priority status is lost. The SN90 system will still attempt to track the target, but the tilt and bearing settings are not adjusted. The priority is identified with a "P". The bearing and tilt settings are automatically adjusted to follow the movements of the tracked target.

  • Page 354: Circle Marker

    Simrad SN90 Reference Manual Objects menu menu provides a list of all current objects. This includes all types of objects Objects including those classified as targets. menu provides additional functionality. Objects • Select the check box on the left side of the object to mark it for deletion, or to save it.

  • Page 355: Own Ship Marker

    User interface Note The marker is stationary. Deleting a marker To delete the circle marker, press on the Operating Panel, or right-click to Circle Marker select on the shortcut menu. Remove Circle Marker Related topics Using markers in the SN90 user interface, page 346 Own Ship Marker Select to add a square symbol to the vessel’s current position in...

  • Page 356: Gear Symbol

    Simrad SN90 Reference Manual Open the menu. Objects In the list of objects, check the box for the object you wish to delete. Select Delete Objects menu menu provides a list of all current objects. This includes all types of objects Objects including those classified as targets.
  • Page 357 User interface Purse seine The gear symbol is provided as a tool to help you plan and shoot the purse seine. The symbol is intended to be used in a structured sequence that starts when you plan to shoot the purse seine. For use with a purse seine, the intended process follows: To start the process: •...

  • Page 358: Rulers

    Simrad SN90 Reference Manual Catch view Use the information in the Catch view to monitor the progress of the purse seine operation. The view does not offer any echo data. • The progress bar at the top of the Catch view shows you the amount of net that has been spent.
  • Page 359 User interface Select on the shortcut menu to delete one or all rulers Delete Ruler Delete All Rulers from the view. Objects menu menu does not provide any information about rulers. Objects Related topics Using markers in the SN90 user interface, page 346 381294/E...

  • Page 360: Using Target And Position Tracking

    Simrad SN90 Reference Manual Using target and position tracking The phrase target is used to identify an echo in the display presentation that you wish to act upon.The echo may be from a material item, a shallow, reef or rock, or from fish, fish schools or mammals.In most cases, the target will move and continuously change...
  • Page 361 User interface Place the cursor over the echo you wish to track. Right-click to open the shortcut menu. Select Initiate Track The tracked target is regarded as an object, and it is identified with a circle and two lines. The two lines reflect the size of the current tracking area. By default, a new manually initiated tracked object is automatically given priority status.
  • Page 362 Simrad SN90 Reference Manual Under certain circumstances the target tracking may not follow the intended echo. This may for example happen if the tracking area is too large. You can start manual tracking by placing multiple markers on a target echo that moves in the view. The physical location of the individual markers and the specific information provided for the latest marker show you the historical path of the chosen target.

  • Page 363: About Position Tracking

    User interface Visual Objects menu menu controls which graphical elements that are shown in the Visual Objects different views. These graphic elements include markers, vectors and targets that are tracked. The majority of the functions are "on/off" buttons to enable or disable these graphic elements in the various views.
  • Page 364 Simrad SN90 Reference Manual Place the cursor on the echo from a potentially dangerous shallow or reef. Right-click to open the shortcut menu. Select Place Marker Open the menu. Objects In the object list, select the object line to activate the control buttons for that particular object.
  • Page 365 User interface Right-click to open the shortcut menu. Select Delete Marker Open the menu. Objects In the list of objects, check the box for the object you wish to delete. Check to select all the markers in the list. Select All Select Delete Objects menu...

  • Page 366: Information Panes

    Simrad SN90 Reference Manual Information panes Topics Biomass information pane description, page 365 Depth information pane description, page 367 Size Distribution information pane description, page 369 Fish Position information pane description, page 372 Zoom information pane, page 374 381294/E...

  • Page 367: Biomass Information Pane Description

    User interface Biomass information pane description The Biomass information pane displays an index of the biomass in the in the current Inspection view. The biomass index is the value, or Nautical area scattering coefficient (NASC), measured with unit m /nmi How to open Before you open an information pane, you must first click in an Inspection view to make it "active".
  • Page 368 Simrad SN90 Reference Manual Note If you have other echo sounders or sonars running asynchronous with the SN90 system, these other systems may cause interference. The SN90 system may detect and measure the transmit pulses from other hydroacoustic systems, and these pulses have an effect on the biomass calculations.

  • Page 369: Depth Information Pane Description

    User interface Depth information pane description The Depth information pane provides the water depth in the current Inspection view. If you have several Inspection views open, you can place one pane in each view. How to open Before you open an information pane, you must first click in an Inspection view to make it "active".
  • Page 370 Simrad SN90 Reference Manual Details Close Select this button to close the information pane. The pane closes immediately. If you wish to reopen it, simply click the button on the top bar one more time. Reset Size You may have manually changed the physical size of the information pane. To...

  • Page 371: Size Distribution Information Pane Description

    User interface Size Distribution information pane description The Size Distribution information pane presents a histogram with the echoes from single fish. The calculations are based on the fact that different fish species have different echo strength. The histogram presents the actual size of the fish by weight, length or echo strength (shown in dB).
  • Page 372 Simrad SN90 Reference Manual logarithm of the reflected intensity (I ) at one metre from the fish, divided by the intensity which strikes the fish, i.e. the incident intensity (I ), i.e. 10 log I Use the page to define the properties for the histogram shown in the Size Distribution Size Distribution information pane.
  • Page 373 User interface Select this button to close the information pane. The pane closes immediately. If you wish to reopen it, simply click the button on the top bar one more time. Reset Size You may have manually changed the physical size of the information pane. To reset the information pane to its default size, select the button in its top Reset size...

  • Page 374: Fish Position Information Pane Description

    Simrad SN90 Reference Manual Fish Position information pane description The Fish Position information pane shows the position of the detected single fish echoes. The three circles in the information pane identify the operational frequencies. The echoes are seen from above. The colours indicate the echo strength.
  • Page 375 User interface You can easily change the physical size and shape of each information pane. Click in its lower right corner, and drag to a new size. To reset the information pane to its default size, select the button in its top Reset size right corner.

  • Page 376: Zoom Information Pane

    Simrad SN90 Reference Manual Zoom information pane The Zoom information pane allows you to magnify a chosen area of the current Inspection view. How to open Before you open an information pane, you must first click in an Inspection view to make it "active".

  • Page 377: Bottom Bar

    User interface Details Area Pinned to Vessel to control the behaviour of the zoom function. When Area Pinned To Vessel the rectangular zoomed area is established, it can either follow the echoes while it moves towards the left, or it can stay put. •...
  • Page 378 Simrad SN90 Reference Manual Description Presentation Modes Each presentation mode offered by the SN90 system provides a selection of views in a predefined pattern. By default, the views are arranged automatically in the presentation. Click on the view border, hold the button depressed, then drag the border to create a smaller or larger rectangle.
  • Page 379 User interface Note To enable UTC time, your SN90 system must be set up to accept the NMEA ZDA datagram. The NMEA ZDA datagram contains the universal time code (UTC), day, month, year and local time zone. This page is located in the dialog box.

  • Page 380: Menu System

    Simrad SN90 Reference Manual Menu system Topics About the menus and menu buttons, page 379 Using the “smart” menu buttons, page 380 Main menu, page 382 Operation menu, page 384 Display menu, page 387 Setup menu, page 391 Active menu, page 397...

  • Page 381: About The Menus And Menu Buttons

    Menu system About the menus and menu buttons To select operating parameters on the SN90 system, use the menu system. The menus are organized in a tree structure with a main menu, a set of secondary menus, and several menu buttons. The menus are organized in a tree structure with a main menu and a secondary menu.

  • Page 382: Using The "Smart" Menu Buttons

    Simrad SN90 Reference Manual Using the “smart” menu buttons Each menu provided by the SN90 system contains several menu buttons. Each button shows the purpose of the button. Some of them also display the current setting. Depending on the properties of each individual button, several methods can be used to change settings.
  • Page 383 Menu system Choosing a setting with the keyboard Place the cursor on the button. Select the button to open the text field. Type a numerical value. If the value exceeds the permitted range, the frame turns red. Type a new value within the accepted range.

  • Page 384: Main Menu

    Simrad SN90 Reference Manual Main menu menu is located at the top of the menu structure. It offers the most common Main functions for efficient use of the SN90 system. Unless you hide the entire menu system, menu is visible at all times, even if you close the secondary menus.
  • Page 385 Menu system operational environment, such as water temperature, salinity, interference and layers in the water column. Gain The purpose of the function is to adjust the echo level in the display Gain presentations. By adjusting the gain you can control how much amplification the SN90 system applies to the received echoes.

  • Page 386: Operation Menu

    Simrad SN90 Reference Manual Operation menu menu allows you to control the operating mode, the recording Operation functionality, and how the SN90 system transmits audio pulses ("ping") into the water. How to open Select the icon. Operation The icon is located under the menu.
  • Page 387 Menu system Tx Power to increase or decrease the output power. The output power is Tx Power selected from predefined steps. Record RAW allows you to record the unprocessed echo data received by the Record RAW transducer. You can save the data to the hard disk, or onto an external storage device.
  • Page 388 Simrad SN90 Reference Manual Relay Output The SN90 system allows you to export the same sensor data that was originally imported. This can "reuse" the same information on other systems. page is used to set up and control this export functionality.

  • Page 389: Display Menu

    Menu system Display menu menu provides basic functions related to the screen behaviour and Display presentation of the echo data. Use the menu to control the visual aspects of the Display system, and to show or hide various elements in the presentation. How to open Select the icon.
  • Page 390 Simrad SN90 Reference Manual Cosmetics Use the functions on the menu to turn "cosmetic" elements in the sonar Cosmetics presentation on or off. The majority of the functions are on/off buttons to enable or disable "cosmetic" elements in the sonar views. This function is not available in all the views.
  • Page 391 Menu system Map Display Once a map service has been chosen, use to choose which map Map Display elements to include in the map presentation. The map is only shown in Horizontal views when is set to True. Range Projection Safety Depth page allows you to change the safety depth settings, and Safety Depth...
  • Page 392 Simrad SN90 Reference Manual corner of the view. The depth is calculated from the current tilt and the distance from the vessel. Presentation Modes All echoes offered by the SN90 system are shown in rectangular views. Combinations of these views are organized in presentation modes. Each presentation mode offered by the SN90 system provides a selection of views in a predefined pattern.

  • Page 393: Setup Menu

    Menu system Setup menu menu provides basic functions related to the installation parameters and the Setup communication with peripheral systems. How to open Select the icon. Setup The icon is located under the menu. Select the Main icon one more time to close the menu. Description Only brief descriptions are provided.
  • Page 394 Simrad SN90 Reference Manual Functions and dialog boxes Tracking Area Use the function to define the size of the area that you want to Tracking Area detect moving objects in. An invisible area - the tracking area - is created as an acquisition area.
  • Page 395 Menu system Beam Visualization With the various beams provided by the SN90 system, it may be difficult to understand the concepts. How do these beams "behave" in the water? The beam visualization feature simulates how the acoustic beams cover the seabed and the water column.
  • Page 396 Simrad SN90 Reference Manual Installation Before you use the SN90 system you must set it up to communicate with the relevant peripherals. This includes the transducer. Use the dialog box Installation to set up all interfaces with external devices, and to set up basic parameters related to installation and operation.
  • Page 397 Menu system Synchronization The purpose of the parameters is to set up the SN90 Synchronization system to operate alone, or as a master or slave in a synchronized system. Synchronization is required in order to avoid interference if the SN90 system is used simultaneously with other hydroacoustic instruments within the same frequency range.
  • Page 398 Simrad SN90 Reference Manual previously saved user settings. These settings can be related to different operations, environmental conditions or basic personal preferences. By default, information about the current range, bearing and tilt will not be saved. On the page, tick the box to include range, bearing User Settings Setup and tilt information the next time you save the user settings.

  • Page 399: Active Menu

    Menu system Active menu menu offers parameters related to current views and data presentations Active provided by the SN90 system. How to open Select the icon. Active The icon is located under the menu. Select the Main icon one more time to close the menu. Description Only brief descriptions are provided.
  • Page 400 Simrad SN90 Reference Manual loss of energy. (Time Variable Gain) compensates for the loss of acoustic energy due to geometric spreading and absorption. Ping-Ping Filter analyses the historical information from previous consecutive Ping-Ping Filter pings in order to remove unwanted noise and interference from the echo presentation.
  • Page 401 Menu system the visibility of schools. It may however also remove scattered fish from the presentation. Target Threshold The SN90 system provides a bottom filter to reduce the sometimes powerful echo from the seabed. This filter is useful if you try to find fish close to the bottom.A higher numerical value increases the filter efficiency and reduces the bottom echo accordingly.
  • Page 402 Simrad SN90 Reference Manual Horizontal Axis The echo presentations in the Inspection views resemble the echograms you see on an echo sounder. The echoes travel from right towards left across the echogram presentation. Use the to choose the horizontal Horizontal Axis scale of the echogram.

  • Page 403: Objects Menu

    Menu system Objects menu menu is - in spite of its name and location - not a menu at all. This "menu" Objects opens a small view to monitor and control the objects you have defined in the sonar views. Each object is identified with a visual marker. How to open Select the icon.
  • Page 404 Simrad SN90 Reference Manual Objects list Once an echo has been provided with a marker in the display presentation it is regarded as an object. The table at the top of the menu shows you all the Objects objects that are currently identified with markers. Each marked object is listed with the following information: •...
  • Page 405 Menu system • : Select to retrieve the previously saved objects. The From File From File Import dialog box offers a list to choose from. Marker Control buttons In the object list, select the object line to activate the control buttons for that particular object.
  • Page 406 Simrad SN90 Reference Manual Comment A text field at the bottom of the menu allows you to type comments. You Objects can only do this if you have computer keyboard connected to your Processor Unit. Insert Relative Position Select to insert object information into the comment field.

  • Page 407: Visual Objects Menu

    Menu system Visual Objects menu menu controls which graphical elements that are shown in the Visual Objects different views. These graphic elements include markers, vectors and targets that are tracked. The majority of the functions are "on/off" buttons to enable or disable these graphic elements in the various views.
  • Page 408 Simrad SN90 Reference Manual Use this function to find the object sizes that fit your preferences. This may for example depend on your physical distance from the screen. The choice you make is saved with the user settings. Bottom Profile For each ping transmitted for a vertical view, the SN90 system offers bottom detection functionality.
  • Page 409 Menu system Track History When you start a target track, a dedicated marker is used to identify the object you are tracking. Each marker is shown as a small circle with or without a short identifying text. In most cases, the target will move and continuously change its position relative to your own vessel.
  • Page 410 Simrad SN90 Reference Manual page allows you how to present the direction of the sea current. Current Flow This page is located in the dialog box. Display Options For this functionality to work, a current sensor must be connected to the SN90 system.

  • Page 411: Cosmetics Menu

    Menu system Cosmetics menu Use the functions on the menu to turn "cosmetic" elements in the sonar Cosmetics presentation on or off. How to open Select to open the menu. Cosmetics is located on the menu. The function Cosmetics Display is not available for the Inspection views.
  • Page 412 Simrad SN90 Reference Manual The map is only shown in Horizontal views when is set to True. Range Projection This function is opened from the menu. Active Depth Dividers Depth dividers are horizontal dotted lines used to indicate depth. You can only add these lines to vertical views.

  • Page 413: Shortcut Menus

    Menu system Shortcut menus Shortcut menus provide additional functionality for operation. How to open Right-click in the view to open the shortcut menu. Description To make a choice, right-click in the view and select the relevant option on the shortcut menu. Note The functionality provided by the shortcut menus differ from one view to another depending on the...
  • Page 414 Simrad SN90 Reference Manual On the page, de-select if you do User Settings Setup New Manually Initiated Track not want new tracked targets to become priority targets. This page is located in the dialog box. To open the page, select on the menu.
  • Page 415 Menu system Place Circle Marker Press on the Operating Panel, or select to add a Circle Marker Place Circle Marker circular marker to the SN90 presentation. A circular symbol appears at the cursor position. The circle is drawn with the same diameter as your purse. By means of the circle you can see the size of the school relative to your purse.
  • Page 416 Simrad SN90 Reference Manual • Press on the Operating Panel. — Gear • Right-click and select on the shortcut menu to delete Remove Gear Symbol the markers from the view. Show Trawl Symbol Remove Trawl Symbol option appears on the short-cut menu when you have...
  • Page 417 Menu system Set New Ship Centre Place the cursor anywhere in the view, right-click and select Set New Ship Centre The function moves the vessel symbol to the selected position. Zoom Zoom Reset Place the cursor anywhere in the view, right-click and select .

  • Page 418: Functions And Dialog Boxes

    Simrad SN90 Reference Manual Functions and dialog boxes Topics Main menu: functions and dialog boxes, page 417 Operation menu: functions and dialog boxes, page 429 Display menu: functions and dialog boxes, page 438 Setup menu: functions and dialog boxes, page 448...

  • Page 419: Main Menu: Functions And Dialog Boxes

    Functions and dialog boxes Main menu: functions and dialog boxes menu is located at the top of the menu structure. It offers the most common Main functions for efficient use of the SN90 system. Unless you hide the entire menu system, menu is visible at all times, even if you close the secondary menus.
  • Page 420 Simrad SN90 Reference Manual Description dialog box User Settings is used to store your favourite settings. These settings can be related to different operations, environmental conditions or basic personal preferences. You can use different settings to create as many user profiles as you like, and give them any name.
  • Page 421 Functions and dialog boxes Saved Settings "Saved settings" are those created and saved by you and other users. Each setting is identified by its name, as well as the time and date it was created. These settings may be deleted or renamed. You can save an unlimited number of profile settings, only limited by the size of the hard disk.

  • Page 422: Range Function

    Simrad SN90 Reference Manual If you do not have a computer keyboard connected to your SN90 system, select button to open an on-screen keyboard. Keyboard Related functionality User Settings Setup page On the page, tick the box to include range, bearing and tilt User Settings Setup information the next time you save the user settings.By default, information about...

  • Page 423: Gain Function

    Functions and dialog boxes Note Even though you can choose a large range value, that does not mean that you can detect your targets on the same range. The range value only defines the range that is shown in the views. Actual target detection will always depend on the operational environment, such as water temperature, salinity, interference and layers in the water column.
  • Page 424 Simrad SN90 Reference Manual presentations will also show this noise. Too much gain may therefore "distort" the presentation. The setting is by default only applied to the active view. It is identified with a thick border. You may wish to adjust the gain on all the views of the same type. To do this, click the...

  • Page 425: Tilt Function

    Functions and dialog boxes Tilt function function allows you to control the vertical angle of the sonar beams. Tilt Specifications: Tilt • : –80 to +80 degrees Horizontal views • : -40 to +40 degrees Vertical views • –80 to +80 degrees Inspection view: How to open This function is opened from the...
  • Page 426 Simrad SN90 Reference Manual With the various beams provided by the SN90 system, it may be difficult to understand the concepts. How do these beams "behave" in the water? By means of a graphic presentation, the dialog box attempts to give you a better Beam Visualization understanding of how the acoustic beams are transmitted into the water.
  • Page 427 Functions and dialog boxes Select either side of the button to choose a value. Select the middle of the button to open it. If you have a keyboard connected to the SN90 system, type the requested value. Sector Select to set the size (in degrees) of the vertical tilt sector in Auto Tilt mode. Sector Select either side of the button to choose a value.

  • Page 428: Bearing Function

    Simrad SN90 Reference Manual Bearing function The Horizontal view in the SN90 display presentation covers the entire sector of 160 degrees. For the other views you must define the horizontal direction of the beam. Use to adjust the horizontal angle referenced to the vessel heading. You can also Bearing select the bearing line and drag it sideways.
  • Page 429 Functions and dialog boxes • In a Horizontal view, select the bearing line and drag it sideways. • Use the Operating Panel. • Select either side of the button to choose a value. • Select the middle of the button to open it. If you have a keyboard connected to the SN90 system, type the requested value.
  • Page 430 Simrad SN90 Reference Manual Inspection views. When the beams are linked they all move simultanously. The distance between each beam is fixed, and defined by the value you have chosen Beam Spacing You can link the inspection beams for both vertical and horisontal movements.

  • Page 431: Operation Menu: Functions And Dialog Boxes

    Functions and dialog boxes Operation menu: functions and dialog boxes menu allows you to control the operating mode, the recording Operation functionality, and how the SN90 system transmits audio pulses ("ping") into the water. How to open Select the icon. Operation The icon is located under the menu.

  • Page 432: Operation Function

    Simrad SN90 Reference Manual Operation function function controls the operating mode of the SN90 system. You can set it Operation to Normal, Replay or Inactive. How to open This function is opened from the menu. Operation Description The SN90 system offers several operating modes.

  • Page 433: Transmission Mode Function

    Functions and dialog boxes Replay File dialog box allows you to choose the echo data file(s) you wish Replay File to play back. Related topics Choosing operating mode and key transmit parameters, page 87 Functions and dialog boxes, page 416 Operation menu: functions and dialog boxes, page 429 Transmission Mode function allows you to control how often the SN90 system shall transmit...

  • Page 434: Tx Power Function

    Simrad SN90 Reference Manual Ping Interval function permits you to choose the time (in milliseconds) Ping Interval between each transmission ("ping"). To change the setting, move the cursor to either side of the button. Select the left side of the button to decrease the value. Select the right side of the button to increase the value.

  • Page 435: Record Raw Function

    Functions and dialog boxes If you work in shallow and/or confined waters you may find it useful to reduce the output power to avoid reverberation. Some of our users claim that reducing the output may be useful if you are looking for scattered fish.
  • Page 436 Simrad SN90 Reference Manual Note The data files will normally become very large. If you wish to record large amounts of data, make sure that you have enough space on your hard disk. The SN90 system is not provided with unlimited disk capacity. We recommend that you save the data files to an external storage device.

  • Page 437: Record Processed Function

    Functions and dialog boxes the files, the maximum file size, and a prefix for the file names. This page is located in the dialog box. This dialog box is opened from the menu. Output Operation Replay File dialog box dialog box allows you to choose which file(s) to be used for Replay File playback.
  • Page 438 Simrad SN90 Reference Manual dialog box on the menu allows you to set up the recording Output Operation parameters. Select Processed Data to File The data files will normally become very large. If you wish to record large amounts of data, make sure that you have enough space on your hard disk.

  • Page 439: Output Dialog Box

    Functions and dialog boxes Output dialog box A key function of the SN90 system is its ability to export data. The purpose of the Output dialog box is to collect all functionality related to data output in one easily accessible location.

  • Page 440: Display Menu: Functions And Dialog Boxes

    Simrad SN90 Reference Manual Display menu: functions and dialog boxes menu provides basic functions related to the screen behaviour and Display presentation of the echo data. Use the menu to control the visual aspects of the Display system, and to show or hide various elements in the presentation.

  • Page 441: Visual Objects Function

    Functions and dialog boxes Visual Objects function is an "on/off" button used to open the menu. Visual Objects Visual Objects How to open is located on the menu. Visual Objects Display Description menu controls which graphical elements that are shown in the Visual Objects different views.

  • Page 442: Transparency Function

    Simrad SN90 Reference Manual Note Before you can change the settings related to a view, you must click inside the view to activate it. The changes you make are by default only valid for the active view. Related topics Cosmetics menu, page 409...

  • Page 443: Display Gain Function

    Functions and dialog boxes Display Gain function Use the function to increase or decrease the strength of the echo Display Gain presentation. How to open This function is opened from the menu. Display Description Use this setting together with to adjust the sensitivity of the SN90 system. Gain Display controls the "amount"...

  • Page 444: Panel Backlight Function

    Simrad SN90 Reference Manual Bottom Filter Noise Filter (1) Gain & TVG (Time Variable Gain) Noise Filter (2) AGC (Automatic Gain Control) RCG (Reverberation Controlled Gain) Display Gain Ping-Ping Filter Note that (Time Varied Gain) and are not filters, but included...

  • Page 445: Colour Threshold Function

    Functions and dialog boxes value. Select the middle of the button to open it.If you have a keyboard connected to the SN90 system, type the requested value. Note function does not work for the Mk3 Operating Panel. Use the Panel Backlight dedicated button on the Operating Panel.

  • Page 446: Screen Brightness Function

    Simrad SN90 Reference Manual Screen Brightness function The intensity of the light given off by the display presentation can be adjusted. You can use this function to increase or decrease the light from the screen to match the ambient light.

  • Page 447: Colour Setup Dialog Box

    Functions and dialog boxes Description This dialog box contains a number of pages selected from the menu on the left side. The choices you make in the dialog box have no effect on the overall Display Options performance of the SN90 system. Note The information shown on the top bar must not be used for vessel navigation.

  • Page 448: Docking Views Function

    Simrad SN90 Reference Manual Which settings to use is mainly a personal preference based on ambient light conditions, the nature of the echoes and your own experience. The choices you make have no effect on the overall performance of the SN90 system.
  • Page 449 Functions and dialog boxes How to open This function is opened from the menu. Display Description Once the function is activated, the various views are placed in named Docking Views windows, and docking positions for these windows are shown. The docking positions show you where to drag and drop the selected view.

  • Page 450: Setup Menu: Functions And Dialog Boxes

    Simrad SN90 Reference Manual Setup menu: functions and dialog boxes menu provides basic functions related to the installation parameters and the Setup communication with peripheral systems. How to open Select the icon. Setup The icon is located under the menu. Select the Main icon one more time to close the menu.
  • Page 451 Functions and dialog boxes Illustration: Each option controls the distance Tracking Area from the inner to the outer radius of the area. The width of the area is fixed, and stretches across a predefined number of beams. This means that the actual width depends on the distance from your vessel to the area.

  • Page 452: Fishing Gear Function

    Simrad SN90 Reference Manual Fishing Gear function By defining the type of fishing gear you are using, the SN90 system may provide more accurate visual presentations. How to open Open this function from the menu. Setup Description function allows you to define the size of your trawl or purse seine.
  • Page 453 Functions and dialog boxes relative location to the bow. This allows you to position your vessel in the best possible location before you shoot the purse seine. When you shoot the net: • Press on the Operating Panel. — Gear •...

  • Page 454: Fish Select Dialog Box

    Simrad SN90 Reference Manual Fish Select dialog box The Size Distribution information pane presents a histogram with the echoes from single fish. The calculations are based on the fact that different fish species have different echo strength. The echo strength also depends on the operating frequency you use. For various reasons, the fish sizes presented in the Size Distribution information pane may be inaccurate.

  • Page 455: Language Function

    Functions and dialog boxes Description You must correctly set the sound speed through the water to obtain accurate depth readings and fish echoes. Several parameters are required to calculate the correct sound speed value. If these parameters are unknown, use the default value of 1494 m/s. This is a typical mean value for sound speed in salt water.

  • Page 456: Dead Reckoning Function

    Simrad SN90 Reference Manual Dead Reckoning function function is used to improve the position of the track line relative to Dead Reckoning the actual position of the drifting fishing gear. For this function to operate, the SN90 system requires input from a speed log.

  • Page 457: Stabilization Function

    Functions and dialog boxes Related topics Functions and dialog boxes, page 416 Setup menu: functions and dialog boxes, page 448 Stabilization function If your SN90 system is installed with a hull unit, it is also provided with a built-in motion sensor to provide electronic stabilization of the sonar beams.

  • Page 458: Screen Captures Dialog Box

    Simrad SN90 Reference Manual Related functionality Motion Reference Unit Use the page to define the data format and the Motion Reference Unit communication port used to import motion information from an external sensor. Related topics Functions and dialog boxes, page 416...
  • Page 459 Functions and dialog boxes Related functionality Operating Panel (Mk1) Press to make a screen capture. Record Operating Panel (Mk2) Press to make a copy of the current display presentation. Screen Capture Operating Panel (Mk3) Press to make a copy of the current display presentation. Screen Capture Top bar Select...

  • Page 460: Beam Visualization Dialog Box

    Simrad SN90 Reference Manual Beam Visualization dialog box With the various beams provided by the SN90 system, it may be difficult to understand the concepts. How do these beams "behave" in the water? By means of a graphic presentation, the...

  • Page 461: Diagnostics Dialog Box

    Functions and dialog boxes presentation, the dialog box attempts to give you a better Beam Visualization understanding of how the acoustic beams are transmitted into the water. This example shows you how the beams behave in the Trawl Vertical presentation mode. Inspection views Plane view This is the active view.

  • Page 462: Export Dialog Box

    Simrad SN90 Reference Manual Note dialog box and functionality is only provided for performance Diagnostics monitoring. The functionality offered by the dialog box is not required for normal use of the SN90 system. The dialog box does not permit you to change any operational settings.

  • Page 463: Installation Dialog Box

    Functions and dialog boxes Export to Select to locate the desired folder. Browse You can also type the folder name. If you do not have a computer keyboard connected to your SN90 system, select the button to open an on-screen Keyboard keyboard.

  • Page 464: About Dialog Box

    Simrad SN90 Reference Manual Related topics Functions and dialog boxes, page 416 Setup menu: functions and dialog boxes, page 448 Sensor Installation page, page 564 Sensor Configuration page, page 569 Motion Reference Unit page, page 571 Synchronization page, page 581...

  • Page 465: Active Menu: Functions And Dialog Boxes

    Functions and dialog boxes Active menu: functions and dialog boxes menu offers parameters related to current views and data presentations Active provided by the SN90 system. How to open Select the icon. Active The icon is located under the menu. Select the Main icon one more time to close the menu.

  • Page 466: Tvg Function

    Simrad SN90 Reference Manual Horizontal Scroll function, page 487 Vertical Reference function, page 488 Echogram dialog box, page 488 Information Pane Options dialog box, page 489 TVG function (Time Variable Gain) compensates for the loss of acoustic energy due to geometric spreading and absorption.
  • Page 467 Functions and dialog boxes The SN90 system allows you to choose your own compensation. You can choose any value from 0 Log R to 40 Log R. If you choose 0 Log R the TVG compensation is disabled. Some experimentation may be required to find the compensations that fit your purposes for individual catch and environmental conditions.

  • Page 468: Ping-Ping Filter Function

    Simrad SN90 Reference Manual When a school of fish covers the whole acoustic beam cross section, the received echo will increase with range simply because the acoustic beam cross section increases with range. The received echo increases according to r , where r is now the radius of the acoustic beam.
  • Page 469 Functions and dialog boxes • : Choose Medium to compare the echoes from the latest four pings. For the Medium current echo to be shown, it must be present in all of these pings. • : Select Strong to allow the filter to compare the echoes from the latest eight Strong pings.

  • Page 470: Pulse Type Function

    Simrad SN90 Reference Manual Pulse Type function function allows you to select the "shape" of the transmitted pulses Pulse Type ("pings"). Different shapes have different qualities. Which pulse type to use depends on the current environmental conditions, your range to the target(s) and the type and speed of the target(s) you are observing.
  • Page 471 Functions and dialog boxes • Frequency modulated transmissions may provide a more stable echo presentation. You may see an increase in target detection because noise and reverberation are reduced. • With CW transmissions, increasing the duration of the transmitted pulse increases its energy and improves target detection capability.
  • Page 472 Simrad SN90 Reference Manual HFM (Hyperbolic Frequency Modulation) In HFM transmissions the frequency changes during the duration of the pulse. The change is hyperbolic. At the beginning of the pulse the frequency increases slowly, while gradually increasing faster and faster towards the end of the pulse. Use the function to define the centre frequency used by the transmitted pulse.

  • Page 473: Bandwidth Function

    Functions and dialog boxes Bandwidth function The bandwidth used by the frequency modulated transmissions is controlled by function. Each frequency modulated transmission ("ping") from Bandwidth the SN90 system consists of a frequency sweep around the centre frequency. The difference between the lowest and the highest frequency in each transmission is referred to as bandwidth.

  • Page 474: Frequency Function

    Simrad SN90 Reference Manual You can adjust the bandwidth to very low values. These values will reduce the resolution in the beam direction, but also increase the range. Some users find it useful to use a smaller bandwith to reduce noise.They will typically use it to remove propeller noise from other vessels in the vicinty.
  • Page 475 Functions and dialog boxes These values are only valid for SN90 systems using the LPT32 transceiver board. For systems using the TRB32 transceiver board, the values are: • Start frequency: 75 kHz • End frequency: 95 kHz • Frequency steps: 1 kHz To find out which transceiver boards your transceiver is fitted with, see the Transceiver page in the...

  • Page 476: Horizontal Tx Sector Function

    Simrad SN90 Reference Manual referred to as bandwidth. The chosen bandwidth will spread equally to both sides of the centre frequency. The bandwidth function does not apply to CW (Continuous Wave) transmissions. Open this function from the menu. Active Pulse Type function The "shape"...
  • Page 477 Functions and dialog boxes If the value in a horizontal swath is smaller than its maximum Horizontal TX Sector value, the centre of the sector is defined by the function. In the Horizontal view Bearing the transmit sector is shown as a triangle originating from the vessel symbol. SLL is short for sidelobe levels.
  • Page 478 Simrad SN90 Reference Manual This is the horizontal TX sector in a horizontal swath. This is the vertical TX sector in a horizontal swath. This is the vertical TX sector in a vertical swath. This is the horizontal TX sector in a vertical swath.

  • Page 479: Vertical Tx Sector Function

    Functions and dialog boxes Vertical TX Sector function function is used to change the vertical opening angle in horizontal Vertical Tx Sector and vertical swaths. Specifications Maximum Other options Horizontal swath Wide Narrow, Normal, Auto Vertical swath 120 degrees 60, 80 degrees Plane swath Wide Narrow, Normal, Auto...

  • Page 480: Range Projection Function

    Simrad SN90 Reference Manual This is the horizontal TX sector in a horizontal swath. This is the vertical TX sector in a horizontal swath. This is the vertical TX sector in a vertical swath. This is the horizontal TX sector in a vertical swath.

  • Page 481: Agc (Automatic Gain Control) Function

    Functions and dialog boxes Target Select Slant range to measure the distance to the target diagonally along the tilt angle. Select True range to measure the distance horizontally. This is the distance you must sail to position yourself on top of the target.
  • Page 482 Simrad SN90 Reference Manual You can choose from four different AGC settings. The settings define the difference between the maximum and minimum echo level for the automatic gain control to take effect. The chosen AGC (Automatic Gain Control) setting is only be applied to the currently active view.
  • Page 483 Functions and dialog boxes Bottom Filter Noise Filter (1) Gain & TVG (Time Variable Gain) Noise Filter (2) AGC (Automatic Gain Control) RCG (Reverberation Controlled Gain) Display Gain Ping-Ping Filter Note that (Time Varied Gain) and are not filters, but included Gain Display Gain only to illustrate the complete "signal path".

  • Page 484: Rcg (Reverberation Controlled Gain) Function

    Simrad SN90 Reference Manual RCG (Reverberation Controlled Gain) function (Reverberation Controlled Gain) function removes unwanted reverberation from the bottom and or from the sea surface. It may however also remove scattered fish from the presentation. How to open You open this function from the menu.
  • Page 485 Functions and dialog boxes Bottom Filter Noise Filter (1) Gain & TVG (Time Variable Gain) Noise Filter (2) AGC (Automatic Gain Control) RCG (Reverberation Controlled Gain) Display Gain Ping-Ping Filter Note that (Time Varied Gain) and are not filters, but included Gain Display Gain only to illustrate the complete "signal path".

  • Page 486: Target Threshold Function

    Simrad SN90 Reference Manual Scattered Use for scattered fish. This setting uses a slightly different algorithm than the other scattered fish settings. Use for scattered fish. This setting uses an algorithm dedicated for higher bandwidth. Use for schools. This setting uses an algorithm dedicated for higher bandwidth.

  • Page 487: Noise Filter Function

    Functions and dialog boxes Noise Filter function removes unwanted acoustic noise from the display presentation. It Noise Filter reduces the interference from other acoustic systems (sonars and echo sounders), as well as the noise from the propellers. How to open You open this function from the menu.
  • Page 488 Simrad SN90 Reference Manual Bottom Filter Noise Filter (1) Gain & TVG (Time Variable Gain) Noise Filter (2) AGC (Automatic Gain Control) RCG (Reverberation Controlled Gain) Display Gain Ping-Ping Filter Note that (Time Varied Gain) and are not filters, but included...

  • Page 489: Horizontal Scroll Function

    Functions and dialog boxes Horizontal Scroll function function controls how fast the echoes shall travel across the Horizontal Scroll Inspection view. Prerequisites The function is only available when an Inspection view is active. How to open You open this function from the menu.

  • Page 490: Vertical Reference Function

    Simrad SN90 Reference Manual Vertical Reference function During operations in a vertical view you may wish to focus on the echoes in the upper or lower part of the view.Use to hide a part of the view. The function is Vertical Reference only available in the Vertical and Plane views.

  • Page 491: Information Pane Options Dialog Box

    Functions and dialog boxes view can be regarded as an "echo sounder" with an adjustable direction. In the SN90 system we use the phrase echogram to describe the information provided by the views. Note The dialog box is only available when an Inspection view is active. To activate a view, click in it.
  • Page 492 Simrad SN90 Reference Manual Related topics Functions and dialog boxes, page 416 Active menu: functions and dialog boxes, page 463 Size Distribution page, page 614 Fish Position page, page 617 Bottom Detection page, page 620 Fish Size Adjustment page, page 622...

  • Page 493: Secondary Functions And Dialog Boxes

    Functions and dialog boxes Secondary functions and dialog boxes Topics Replay File dialog box, page 492 Recording dialog box, page 494 LAN Port Setup dialog box, page 495 Serial Port Setup dialog box, page 497 Add Serial Port dialog box, page 499 Port Monitor dialog box, page 500 Messages dialog box, page 502 Tracking Area Setup dialog box, page 505...

  • Page 494: Replay File Dialog Box

    Simrad SN90 Reference Manual Replay File dialog box dialog box allows you to choose which file(s) to be used for playback. Replay File The files listed were generated automatically during recording. Each file is identified with the time and date it was made.
  • Page 495 Functions and dialog boxes Details Files This list displays the files that are currently available for playback. Select to include additional file(s) in the list. A standard Files operating system dialog box opens to let you choose files. Remove Select a file in list, then select .

  • Page 496: Recording Dialog Box

    Simrad SN90 Reference Manual Related topics Recording and replaying echo data, page 127 Record RAW function, page 433 Functions and dialog boxes, page 416 Secondary functions and dialog boxes, page 491 Recording dialog box allows you to record the unprocessed echo data received by the transducer.

  • Page 497: Lan Port Setup Dialog Box

    Functions and dialog boxes Save Select to keep the recording. Save Delete Select to cancel the recording and delete the raw data file. Delete Advanced Select to add information. You can insert information about catch and Advanced bycatch, and provide details about species, weight and size. Comment You can also add comments.
  • Page 498 Simrad SN90 Reference Manual page is located in the dialog boxes. The I/O Setup Installation Output Installation dialog box is located on the menu. The dialog box is located on the Setup Output menu. Operation Description Ethernet (Local Area Network...

  • Page 499: Serial Port Setup Dialog Box

    Functions and dialog boxes Remote IP Address is the Internet Protocol (IP) address for a peripheral Remote IP Address device. This peripheral device is for example a sensor on the network, or another navigation or hydroacoustic system. If the data communication between your Processor Unit and the peripheral device is set up to only import data from the device, the remote IP address is not required.
  • Page 500 Simrad SN90 Reference Manual Description A serial port is a serial communication interface that is still very common between maritime systems. It is very important that any serial line between the SN90 system and any external system is setup correctly with identical parameters at each end.

  • Page 501: Add Serial Port Dialog Box

    The first time the Processor Unit is turned on after a SN90 system software installation, it will automatically do a search to find available serial ports. Since the Processor Unit was provided by Kongsberg Discovery as a part of the delivery, you can only use the ports that were fitted by the manufacturer.

  • Page 502: Port Monitor Dialog Box

    Simrad SN90 Reference Manual If you have added new hardware, you must also allow the SN90 system to use the new port(s).. Select under the list of serial ports on the page. First select the I/O Setup port in the list, then select...
  • Page 503 Functions and dialog boxes Description dialog box Port Monitor provides one text box for incoming messages ( Rx Data and one for outgoing messages ). Use these boxes Tx Data and your knowledge of the data communication to investigate the datagrams. Note dialog box is Port Monitor...

  • Page 504: Messages Dialog Box

    Simrad SN90 Reference Manual If you wish to change your attention to a different serial or LAN port, you can choose the communication port here instead of returning to I/O Setup Related topics Setting up the interfaces to peripheral devices, page 195...
  • Page 505 Functions and dialog boxes Message types Errors These errors are serious. Operation of the SN90 system cannot continue. You must turn off the SN90 system and attempt a restart. System alarms System alarm messages are related to the operation of the SN90 system or significant software components.
  • Page 506 Simrad SN90 Reference Manual Delete Delete All Select to remove the currently selected message, or to remove all Delete Delete All messages of the current type. Acknowledge Acknowledge All Select to accept the currently selected message, or Acknowledge Acknowledge All accept all new messages of the current type.

  • Page 507: Tracking Area Setup Dialog Box

    Functions and dialog boxes Tracking Area Setup dialog box Use the function to define the size of the area that you want to detect Tracking Area moving objects in. An invisible area - the tracking area - is created as an acquisition area. In order for the SN90 system to find and lock on the intended target, it needs to be kept within this tracking area.

  • Page 508: Hull Unit Control Dialog Box

    Simrad SN90 Reference Manual Note To track a target efficiently, the area should be as small as possible. For example, use a small area if you track single fish or small schools. However, if the target is large, or moves very fast, a larger area may be beneficial.

  • Page 509: New Marker Dialog Box

    Functions and dialog boxes Retracting the transducer to a middle position may be useful if you use the SN90 system simultaneously with other sonars. A higher position will permit you to increase the vessel speed. If you operate in very shallow waters, you may also reduce the risk of hitting bottom.

  • Page 510: Power Off Dialog Box

    Simrad SN90 Reference Manual When the new marker is created, it is automatically assigned a unique identifier (UID) by the SN90 system. Related topics Functions and dialog boxes, page 416 Secondary functions and dialog boxes, page 491 Power Off dialog box The operating system functions are located on the right side of the top bar.

  • Page 511: Pages In The Output Dialog Box

    Functions and dialog boxes Pages in the Output dialog box A key function of the SN90 system is its ability to export data. The purpose of the dialog box is to collect all functionality related to data output in one easily Output accessible location.
  • Page 512 Simrad SN90 Reference Manual Description settings control how and where the recorded files are saved on the hard File Setup disk, or on an external storage device. By adding a prefix to the file names you can identify the files you have recorded during a specific survey. You can also define a maximum size of the files.

  • Page 513: I/O Setup Page

    Functions and dialog boxes SN90 system is not provided with unlimited disk capacity. We recommend that you either save the data files to an external storage device, or use a network disk. Current File Size The current file size is displayed during data recording. Related functionality Record indicator on the top bar shows you when recording has been...
  • Page 514 Simrad SN90 Reference Manual Description The SN90 software automatically scans the Processor Unit to locate and identify the available communication ports. Once the software has established a list of valid interfaces, you can set up and control the communication parameters.
  • Page 515 Functions and dialog boxes Resource The Processor Unit can have several serial ports. This is the identification of the communication port. The serial ports are normally named COM1, COM2 and so on. Baud Rate This is the current baud rate specified for the serial line. The communication parameters defined for NMEA 0183 are: •...
  • Page 516 Simrad SN90 Reference Manual is the default setting. If you want to use point-to-point communication in a closed network, set the remote IP address manually. Remote Port is important if you want to export information from the Remote Port Processor Unit to a peripheral device on the local area network (LAN). The application on the peripheral device will "listen"...

  • Page 517: Processed Data To File Page

    Functions and dialog boxes device. Select one of the listed ports and then under the table to set up the port Setup parameters. A dedicated dialog box opens for you to change or accept the settings. The communication parameters defined for NMEA 0183 are: •...
  • Page 518 Simrad SN90 Reference Manual Description Select the output type from the list, and then where to save the files. Select save your choices. Note The data files will normally become very large. If you wish to record large amounts of data, make sure that you have enough space on your hard disk.
  • Page 519 Functions and dialog boxes Output Select the file format you want to export. Current Output Folder This text box shows you the file path that is currently used to store the data files. Select to choose a different output folder to store the files. This function Browse uses a standard operating system dialog box.

  • Page 520: Marker Output Page

    Simrad SN90 Reference Manual Save Select to keep the changes you have made. Save Related topics Recording and exporting processed echo data, page 133 Functions and dialog boxes, page 416 Operation menu: functions and dialog boxes, page 429 Output dialog box, page 437...
  • Page 521 Select which datagram format(s) to export. MDS (Measured Data Shoal) Simrad MDS is a proprietary datagram format created by Kongsberg Discovery. It contains the location, bearing and depth of a tracked target. All information is presented relative to your own vessel. All data are related to the tracked target.

  • Page 522: Relay Output Page

    Simrad SN90 Reference Manual Select to allow export of the chosen data format. Once an output type has been defined, it is listed in the box on the left side of the page. To start Installed Outputs data recording, open the button, and select On.
  • Page 523 Functions and dialog boxes Description The information imported to the SN90 system from various sensors can also be useful for other systems on board your vessel. The SN90 system allows you to "re-export" this sensor information. When activated, the selected sensor information is sent out on the chosen communication port (serial or LAN).
  • Page 524 Simrad SN90 Reference Manual You cannot define the communication port parameters here. If you need to adjust these, you must select after you have defined the data output parameters. I/O Setup page is located in the dialog boxes. I/O Setup...
  • Page 525 Functions and dialog boxes Description Each screen recording you make is saved in format on the Processor .mp4 Unit hard disk. The file name reflects the current date and time. Select on the top bar to start and stop the recording. Screen Recording Note Video data files will normally become very large.

  • Page 526: Screen Captures File Location Page

    Simrad SN90 Reference Manual This page is located in the dialog box. To open the page, select Installation on the menu. Installation Setup Related topics Capturing the display presentation in a video file, page 142 Selecting where to save the video files, page 142...
  • Page 527 Functions and dialog boxes Press to make a screen capture. Record Operating Panel (Mk2) Press to make a copy of the current display presentation. Screen Capture Operating Panel (Mk3) Press to make a copy of the current display presentation. Screen Capture Top bar Select to make a copy of the entire display presentation.

  • Page 528: Pages In The Display Options Dialog Box

    Simrad SN90 Reference Manual Pages in the Display Options dialog box dialog box is used to specify basic settings for the sonar presentation. Display Options How to open This dialog box is opened from the menu. Display Description This dialog box contains a number of pages selected from the menu on the left side.

  • Page 529: General Page

    Functions and dialog boxes General page page in the dialog box controls the location of the menu. General Display Options You can select which navigational information to be shown on the top bar. You can also choose to see Coordinated Universal Time (UTC) at the bottom of the presentation. How to open This page is located in the dialog box.
  • Page 530 Simrad SN90 Reference Manual Heading Select this check box to see the vessel's current heading on the top bar. The heading information must be provided by an external positioning system, or by a heading sensor or gyro compass connected to the SN90 system.
  • Page 531 Functions and dialog boxes For most purposes, UTC is used interchangeably with GMT, but GMT is no longer precisely defined by the scientific community. [...] The current version of UTC is defined by International Telecommunications Union Recommendation (ITU-R TF.460-6), Standard-frequency and time-signal emissions and is based on International Atomic Time (TAI) with leap seconds added at irregular intervals to compensate for the slowing of Earth's rotation.

  • Page 532: Map Display Page

    Simrad SN90 Reference Manual Map Display page Once a map service has been chosen, use to choose which map elements to Map Display include in the map presentation. How to open This page is located in the dialog box. The...

  • Page 533: Safety Depth Page

    Functions and dialog boxes Range Projection function The distance to a target located anywhere in the water column can be measured in two ways. This can either be the horizontal distance to the target (True), or along the tilt angle (Slant). The function defines how this distance is Range Projection measured.
  • Page 534 Map Display elements to include in the map presentation. These map settings are only valid for WMS (Web Map Service) maps from a KONGSBERG navigation system. Map function This is an "on/off" switch. Use to enable or disable the geographical map layer.

  • Page 535: Tooltip Page

    Functions and dialog boxes the tilt angle (Slant). The function defines how this distance is Range Projection measured. This function is opened from the menu. Active Related topics Using maps, page 152 Functions and dialog boxes, page 416 Display menu: functions and dialog boxes, page 438 Display Options dialog box, page 444 Cosmetics menu, page 409 Map Display page, page 530...

  • Page 536: Own Ship Page

    Simrad SN90 Reference Manual Own Ship page In order to maintain a visual presentation of your vessel’s previous movements, you can draw these with a line. This line is drawn after the vessel symbol in the sonar views, and visualizes your past movements. We refer to this line as the History Line.

  • Page 537: Vertical View Orientation Page

    Functions and dialog boxes Vertical View Orientation page page allows you to decide whether the vertical views Vertical View Orientation should be presented from right to left, or from left to right. How to open This page is located in the dialog box.
  • Page 538 Simrad SN90 Reference Manual Description Set New Ship Centre function on the shortcut menu moves the ship symbol away from the centre of the view. Place the cursor anywhere in the view, right-click and select . The function moves the vessel Set New Ship Centre symbol to the selected position.

  • Page 539: Current Flow Page

    Functions and dialog boxes function to move the ship symbol away from the centre of the view. This function is available on the shortcut menu in relevant views. Related topics Functions and dialog boxes, page 416 Display menu: functions and dialog boxes, page 438 Display Options dialog box, page 444 Current Flow page A current sensor can be connected to the SN90 system.

  • Page 540: Cursor Readout Page

    Simrad SN90 Reference Manual function shows you the speed and direction of the water current Current Vector under your vessel. One or more arrow are drawn to or from the vessel symbol to indicate the properties of the sea currents. The direction of the arrows indicate the direction of the water currents.
  • Page 541 Functions and dialog boxes Note The views are "linked" together. If you, for example, enable Depth in one Horizontal view, it appears automatically in all other Horizontal views in the different presentation modes. The following information can be provided: Current A current sensor can be connected to the SN90 system.

  • Page 542: Presentation Modes Page

    Simrad SN90 Reference Manual Presentation Modes page All echoes offered by the SN90 system are shown in rectangular views. Combinations of these views are organized in presentation modes. Each presentation mode offered by the SN90 system provides a selection of views in a predefined pattern. To open a presentation mode use the relevant tab on the bottom bar.

  • Page 543: Pages In The Environment Dialog Box

    Functions and dialog boxes Pages in the Environment dialog box Environmental parameters such as salinity, sound speed and water temperature all play an important part to present accurate echo data. Use the parameters to Environment define these values. Depending on the current sea and weather conditions, you may need to change these values frequently.
  • Page 544 Simrad SN90 Reference Manual Description You must correctly set the sound speed through the water to obtain accurate depth readings and fish echoes. Several parameters are required to calculate the correct sound speed value. If these parameters are unknown, use the default value of 1494 m/s.
  • Page 545 Functions and dialog boxes Manual Select to provide a sound speed value manually. A value provided Manual manually can be relevant if neither a sound speed sensor nor a CTD (Conductivity Temperature Depth) sensor is available. Absorption The absorption curve is calculated and drawn using the parameters provided. Related topics Defining settings related to user preferences and individual customizing, page 156 Functions and dialog boxes, page 416...

  • Page 546: Pages In The Diagnostics Dialog Box

    Simrad SN90 Reference Manual Pages in the Diagnostics dialog box The SN90 system is a computerized sonar. There are hardly any analogue circuitry, and the possibility of traditional troubleshooting is limited. In order to rectify this, a built-in software application is available to offer test and maintenance functionality.

  • Page 547: Processor Page

    Functions and dialog boxes B-Scan page, page 556 Matrix page, page 559 Processor page page offers an overview of the parameters related to software version, Processor operation and network. How to open This page is located in the dialog box. Diagnostics Open the dialog box from the...
  • Page 548 Simrad SN90 Reference Manual Ping Count : The value is simply a consecutive count of transmissions Ping Count ("pings") since the SN90 system was turned on and activated. Ping Interval The ping interval (1/ping repetition frequency (PRF)) is the ping rate measured in time between each acoustic transmission.

  • Page 549: Sensors Page

    Functions and dialog boxes Sensors page page presents a table with all the sensors currently connected to the SN90 Sensors system. For each sensor, the status is provided. How to open This page is located in the dialog box. Diagnostics Open the dialog box from the menu.

  • Page 550: Transceiver Page

    Simrad SN90 Reference Manual Transceiver page page offers key information about each transceiver board in the Transceiver Transceiver Unit. The purpose of the transceiver boards is to first create and transmit the acoustic pulses. After the transmission the transceiver boards receive the echoes from the seabed and/or the water column.

  • Page 551: Transducer Page

    Functions and dialog boxes Disabling a transceiver circuit board can be useful for a number of reasons. • A circuit board is missing. The SN90 system starts up even if transceiver boards are malfunctioning. The system will then need more time to finish the start-up sequence, and a short message will be provided.
  • Page 552 Simrad SN90 Reference Manual Open the dialog box from the menu. Diagnostics Setup Description page presents all the elements that are used in the transducer. The Transducer presentation attempts to organize the elements in the same manner as in the physical transducer.
  • Page 553 Functions and dialog boxes Reception Test Select to start an automatic test of the individual transducer Reception Test elements. For the test to start, the SN90 system must be "pinging". The reception test validates each single element in the transducer, and returns the status using a simple colour code.

  • Page 554: Noise Page

    Simrad SN90 Reference Manual Noise page The operational performance of the SN90 system depends on the noise conditions. It is essential that the noise signature is as low as possible. Use the page to test the Noise current noise conditions.
  • Page 555 Functions and dialog boxes Note With the vessel in port, the environmental conditions are not satisfactory. In the shallow waters of the port, noise from other vessels, dockyard workers or machinery will cause unreliable test results. If you do this tests in a busy harbour, or with noise sources present, the sensitive receivers will detect all the noise in the nearby waters.

  • Page 556: Hull Unit Page

    Simrad SN90 Reference Manual The converters transform the analogue echoes to digital format. Signal processing circuitry can create digital noise. Noise Test Select . This starts the noise test. The test is run Start Noise Measurements continuously on each of the following pings until you stop it.

  • Page 557: Element Bite Dialog Box

    Functions and dialog boxes appropriate commands on the SN90 system, the Motor Control Unit will start and stop the motor. It will also make sure that the motor rotates the correct way. A hull unit may be provided as an option. It allows you to lower and hoist the transducer. The readouts will say "Not available"...

  • Page 558: B-Scan Page

    Simrad SN90 Reference Manual Description dialog box offers these pages: Element BITE • B-Scan page allows you to monitor the data received from each of the elements B-Scan in the transducer. The start sample and the number of samples to be displayed are selectable.
  • Page 559 Functions and dialog boxes To detect unserviceable transducer elements and/or transceiver boards, you must compare the rectangles. When operating the SN90 system in port, the colours will be less homogeneous due to the environmental noise and the shallow depth. During normal operation at sea the colours will be homogeneous.
  • Page 560 Simrad SN90 Reference Manual Start Sample Start Sample select which sample to start the test with. Each vertical line shows the signal measured from a single transducer element. Sample 0 (zero) is measured when the ping starts, while (for example) sample 1000 is located several meters out.

  • Page 561: Matrix Page

    Functions and dialog boxes Logarithmic or linear scale can be chosen for the presentation. Logarithmic scale is normally used since this scale offers the best overview of the complete dynamic range. A linear scale will enhance the differences closer to the maximum value. Use the setting to select the number of colours in the presentation.
  • Page 562 Simrad SN90 Reference Manual This illustration shows a typical matrix presentation. This is a generic illustration. Any similarities with specific products are accidental. Description When you move the cursor over the matrix presentation of the transceiver channels, each element in the transducer can be clearly identified as a rectangle.
  • Page 563 Functions and dialog boxes • Select when you have received the data and wish to freeze the None/freeze presentation for a closer study of the results. • Select to start the test. Element amplitude • Select to start the test and observe the element phases. Element phase Start Averaging The test process...
  • Page 564 Simrad SN90 Reference Manual Generator In order to run this test, a built-in signal generator is used. You must specify the amplitude and frequency to be used by this generator. The signal generator creates a test signal inserted in parallel with the signal measured on the transducer.

  • Page 565: Pages In The Installation Dialog Box

    Functions and dialog boxes Pages in the Installation dialog box Before you use the SN90 system you must set it up to communicate with the relevant peripherals. Use the dialog box to set up all interfaces with external devices, Installation and to set up basic parameters related to installation and operation.

  • Page 566: Sensor Installation Page

    Simrad SN90 Reference Manual Transceiver Upgrade page, page 605 Sensor Installation page For the SN90 system to use and offer correct navigational information, one or more external sensors must be connected. Typical sensors are those providing navigational information (heading, speed or geographical position). Use the...
  • Page 567 Functions and dialog boxes Note Just making changes and selecting at the bottom of the page will not install anything. Select what to install, define the relevant parameters, and then select A summary of all the sensors that are connected to the SN90 system is provided in the dialog box.
  • Page 568 Simrad SN90 Reference Manual • Data bits • : Even Parity • Stop bits Some instruments may provide other parameters and/or options. You must always check the relevant technical documentation supplied by the manufacturer. Note You are not permitted to make any changes. To change the communication parameters, use the page.
  • Page 569 Functions and dialog boxes This means that blank characters are inserted into the datagram. You may also specify two characters that identifies the SN90 system as the "sender". In most cases, you will only need to define a Talker ID if your receiving system needs it for a specific purpose.
  • Page 570 Simrad SN90 Reference Manual • Rotation Around Z(Yaw) In the user interface you will only need to specify the installation angles when the parameters are shown. Rotation Around X Specify an angle (in degrees) to compensate for any deviation from the X axis (fore-and-aft direction) in the vessel coordinate system.

  • Page 571: Sensor Configuration Page

    The majority of the datagrams used by the SN90 system are defined by the National Marine Electronics Association (NMEA). Other proprietary datagrams are defined by third-party organizations or by Kongsberg Discovery. Any information in a datagram, for example, the vessel speed, may be provided in different datagrams from several sensors.
  • Page 572 Simrad SN90 Reference Manual The SN90 system can communicate with several different sensor types. Use the Sensor page to define which external sensors your SN90 system will import Installation information from. You must also specify which datagram formats to use. The...

  • Page 573: Motion Reference Unit Page

    Functions and dialog boxes Source list presents all the datagrams that you have selected to provide input Source data. Use the two large arrows to move the selected datagram up or down the priority list. Configuration For most sensors, you can specify a manual value. Use this functionality if a sensor is unserviceable or not installed.
  • Page 574 • Kongsberg EM Attitude 1000 The EM Attitude 1000 is a proprietary datagram format created by Kongsberg Discovery for use with digital motion sensors. It holds roll, pitch, heave and heading information. In many new designs, this datagram format has been replaced with EM Attitude 3000 format.
  • Page 575 Functions and dialog boxes The Kongsberg EM Attitude 3000 is a proprietary datagram format created by Kongsberg Discovery for use with digital motion sensors. It holds roll, pitch, heave and heading information. Baud Rate Use this setting to specify the baud rate ("speed") for the serial communication.

  • Page 576: Installation Parameters Page

    Simrad SN90 Reference Manual Installation Parameters page pages allow you to define the relationship between the Installation Parameters physical locations of the various sensors and the transducer. All relevant system units and sensors must be defined with their physical offset values in relation to the defined Ship Origin in the vessel’s coordinate system.
  • Page 577 Functions and dialog boxes Ship page Use the page to define a specific reference point (Ship Origin or origo) for the Ship various sensors connected to the SN90 system. The origin is the common reference point where all three axis in the vessel coordinate system meet. All physical locations of the vessel’s sensors (radar and positioning system antennas, echo sounder and sonar transducers, motion reference units, etc.) are referenced to the origin.
  • Page 578 Simrad SN90 Reference Manual Z Offset Select the offset value on the Z axis (vertical) from the default Ship Origin. This is the origin that was defined by the vessel designer and/or the shipyard when the vessel was built. Adjust with a positive value for Z if the new preferred origin is located under the default Ship Origin.
  • Page 579 Functions and dialog boxes Details X Offset Select the offset value on the X axis (fore-and-aft direction) from the Ship Origin. Adjust with a positive value for X if the transducer is located ahead of the ship origin. Y Offset Select the offset value on the Y axis (athwartship) from the Ship Origin.
  • Page 580 Simrad SN90 Reference Manual Example: If a 30-degree Y angle is requested, the must be set to Rotation Around Y 60 degrees (that is the angle from the default position). Since the transducer is pointing straight forward, the value is Rotation Around Z 0 (zero).
  • Page 581 Functions and dialog boxes From this raised position, turn the transducer towards port. The indicator arrow is still pointing up. This is a Rotation Around Z. Proceed until the requested angle has been reached. Example: If a -100-degree Z angle is requested, the must be set Rotation Around Z to -100 degrees (that is the angle from the forward position).
  • Page 582 Simrad SN90 Reference Manual The required accuracy of the offset and rotation angles depends on the accuracy requirements for the echo data. Note Correct values for motion sensor rotation are critical for the sonar performance. The motion sensor offset values (its physical location relative to the vessels' coordinate system) are not important for sonar operation.

  • Page 583: Synchronization Page

    Functions and dialog boxes Z Offset Select the offset value on the Z axis (vertical) from the Ship Origin. Adjust with a positive value for Z if the sensor is located under the ship origin. Rotation Around X Specify an angle (in degrees) to compensate for any deviation from the X axis (fore-and-aft direction) in the vessel coordinate system.
  • Page 584 Simrad SN90 Reference Manual The SN90 system offers functionality for remote transmit synchronization. It can be set up to operate in either Master or Slave mode. In physics, interference is the phenomenon in which two waves superpose each other to form a resultant wave of greater or lower amplitude. Interference usually...
  • Page 585 Functions and dialog boxes Slave The Slave mode is used if the SN90 system shall transmit only when permitted by a peripheral system. When the Slave mode is selected, the SN90 system will not transmit ("ping") unless an external trigger appears on the chosen synchronization port.

  • Page 586: Units Page

    Simrad SN90 Reference Manual Related topics Setting up the interfaces to peripheral devices, page 195 Functions and dialog boxes, page 416 Setup menu: functions and dialog boxes, page 448 Installation dialog box, page 461 Units page The user interface presents many measurements. These measurements are for example related to depth, range and distance.
  • Page 587 Functions and dialog boxes Details Length Choose the unit of measurement for all the readouts related to range and distances in the SN90 system user interface. This may for example be the cursor location. Depth Choose the unit of measurement for all the presentations of depth.

  • Page 588: Operating Panel Page

    Simrad SN90 Reference Manual Operating Panel page The Operating Panel offers all necessary control functions for normal operation. It further allows you to assign certain functions to dedicated buttons and switches. The page is used to select which physical hardware panel you use, and to Operating Panel assign functionality to the programmable buttons.
  • Page 589 Functions and dialog boxes Operating Panel Mk1 The Mk1 Operating Panel is connected to the Processor Unit with three cables. The dual interface cable provides power and serial communication. The USB interface cable is used to read the trackball movements. A small commercial power supply is used to provide power to the Operating Panel.
  • Page 590 Simrad SN90 Reference Manual Note It is very important that the chosen communication port is not put to other use in page in the dialog box. If you have two operating panels I/O Setup Installation in use, neither communication ports must be used for any other purposes.
  • Page 591 Functions and dialog boxes Before you can assign custom user settings to the operating panel, a selection of settings must be available from the dialog box. The User Settings User Settings dialog box is located on the menu. Main Any user setting selected on the Operating Panel is identified in the upper left corner of the Horizontal view.
  • Page 592 Simrad SN90 Reference Manual Button Options The Mk2 Operating Panel is fitted with three function buttons. The buttons are identified as . Each button can be assigned a dedicated function. The three function buttons are grouped with the button. Screen Capture...
  • Page 593 Functions and dialog boxes Screen Recording This is an "on/off" function. The function allows you to Screen Recording record and save the echo presentation as a video file. Each screen recording you make is saved in format on the Processor Unit hard disk. The file .mp4 name reflects the current date and time.
  • Page 594 Simrad SN90 Reference Manual Operating Panel Mk3 The Mk3 Operating Panel is connected to the Processor Unit with a USB cable. A dedicated power supply unit is not required. Details User Settings Presentation Modes On the Mk3 Operating Panel, the requested user setting or presentation mode is chosen with a single button.
  • Page 595 Functions and dialog boxes Rotary Switch Functions Rotate The Mk3 Operating Panel is fitted with two rotary switches. The switches are identified with numbers. Each switch can be assigned a function related to range, gain, bearing or tilt. Under , assign one function to each rotary switch on Rotary Switch Options Rotate...
  • Page 596 Simrad SN90 Reference Manual Zoom Place the cursor anywhere in the view, right-click and select . Only one Zoom zoom level is provided. Select one more time to restore the original Zoom view. Menu Off This is an "on/off" function. Unless you need to make frequent changes to the operating parameters, you may want to hide the menu from the display presentation.

  • Page 597: Echogram Settings Page

    Functions and dialog boxes Computer audio enabled for transducer movements The Operating Panel is not fitted with a loudspeaker. Select this function to allow the Processor Unit to provide audio notifications when you lower or hoist the transducer. Related topics Defining the user-selected features on the Operating Panel, page 175 Echogram Settings page The SN90 system offers several inspection beams.

  • Page 598: Hull Unit Configuration Page

    Simrad SN90 Reference Manual Related topics Functions and dialog boxes, page 416 Setup menu: functions and dialog boxes, page 448 Installation dialog box, page 461 Hull Unit Configuration page A hull unit may be provided as an option. It allows you to lower and hoist the transducer.

  • Page 599: System Protection Page

    Functions and dialog boxes Related topics Functions and dialog boxes, page 416 Setup menu: functions and dialog boxes, page 448 Installation dialog box, page 461 System Protection page Safe operation of the SN90 system is made possible using multiple sensors that monitor the operation and the performance.
  • Page 600 Simrad SN90 Reference Manual is retracted, transmissions will stop when the transducer reaches the same position. This functionality is only available if a hull unit has been activated in the user interface. Tx Inhibit Power The high voltage supplied to the transceiver boards is monitored. You are not permitted to change the alarm limits.
  • Page 601 Functions and dialog boxes Screen Recording function allows you to record and save the echo presentation Screen Recording as a video file. Each screen recording you make is saved in format on the .mp4 Processor Unit hard disk. The file name reflects the current date and time. Video data files will normally become very large.
  • Page 602 Simrad SN90 Reference Manual The data files will normally become very large. If you wish to record large amounts of data, make sure that you have enough space on your hard disk. The SN90 system is not provided with unlimited disk capacity. We recommend that you save the data files to an external storage device.

  • Page 603: Map Setup Page

    True. Details WMS (Web Map Service) Only WMS (World Map Service) maps from a KONGSBERG navigation system are supported. The Processor Unit must be connected to the ship network. Type the correct URL to make contact with the map server.

  • Page 604: User Settings Setup Page

    Simrad SN90 Reference Manual Safety Depth page page allows you to change the safety depth settings, and thus the Safety Depth presentation of the various water depths. Range Projection function The distance to a target located anywhere in the water column can be measured in two ways.

  • Page 605: Software License Page

    Functions and dialog boxes New Manually Initiated Track During normal operation, some echoes are clearly more interesting than others. In many situations specific echoes may be regarded as targets. To set up the SN90 system to provide such information, you can start target tracking. function allows you to manually start target tracking.
  • Page 606 Simrad SN90 Reference Manual Description The software license is a 32 character hexadecimal string based on the hardware identifier ( ). This unique identifier is generated using information from Hardware ID key components in the Processor Unit. The software license is linked to the physical Processor Unit.

  • Page 607: Transceiver Upgrade Page

    Functions and dialog boxes Related topics Installing and maintaining software, page 230 Functions and dialog boxes, page 416 Setup menu: functions and dialog boxes, page 448 Installation dialog box, page 461 Transceiver Upgrade page The SN90 system offers a large number of transceiver channels. 8 identical transceiver boards are used.

  • Page 608: Pages In The Echogram Dialog Box

    Simrad SN90 Reference Manual Pages in the Echogram dialog box dialog box allows you to control the echogram presentation in the Echogram Inspection views. Two pages control the horizontal lines and the echogram type with applied TVG (time variable gain). One page controls how fast the echogram travels horizontally across the presentation.
  • Page 609 Functions and dialog boxes Description The settings on the page are Lines all related to visual appearance. The changes you make are by default only valid for the active Inspection view. Click in the Inspection view to activate it. The active view is identified with a thicker border.
  • Page 610 Simrad SN90 Reference Manual Note This is an optional function. In order to use this functionality, a dedicated software license is required. Contact you local dealer for more information. Lines You can enable or disable one or more horizontal lines on the echogram.

  • Page 611: Echogram Page

    Functions and dialog boxes • : A short vertical line is drawn in the upper part of the echogram Distance once every specified number of nautical miles. Annotations Select to allow annotation markers to be shown. If you select Text Line , each text annotation is followed by a vertical line for improved Line...
  • Page 612 Simrad SN90 Reference Manual Description Each Inspection view offered by the SN90 system can show you a different echogram type. Which type to see is chosen on this Echogram page. The page also allows you to select which TVG curve to use for the chosen echogram.
  • Page 613 Functions and dialog boxes Only echoes detected and interpreted as single fish are shown. The echoes are compensated for their physical position in the beam (beam compensation). This means that fish in the outer region of the beam are adjusted to correct size even though their echoes are weaker.

  • Page 614: Horizontal Axis Page

    Simrad SN90 Reference Manual In a Pelagic echogram the calculations disregard any bottom detection. All calculations are based on the entire echogram shown in the view. If the bottom echo is present in the echogram, the biomass calculation will be wrong.
  • Page 615 Functions and dialog boxes Description The horizontal scale controls how "fast" the echoes move from right towards left across the presentation. The changes you make are by default only valid for the active Inspection view. Click in the Inspection view to activate it.

  • Page 616: Pages In The Information Pane Options Dialog Box

    Simrad SN90 Reference Manual Pages in the Information Pane Options dialog The SN90 system offers several information panes to provide additional and detailed data from the presentations. The information panes are opened and closed from the top bar. Several of the information panes are fitted with a button.
  • Page 617 Functions and dialog boxes Description The settings provided by the page allow Size Distribution you to shape the vertical bars in the Size Distribution information pane to meet your own requirements. You can define the upper and lower limits, the accuracy, and the vertical resolution.
  • Page 618 Simrad SN90 Reference Manual Example: If you have chosen the Length mode, and specifies 10 in this spin box, fish shorter than 10 cm will not be shown in the histogram. Upper Limit This function specifies the upper limit of the target strengths shown in the histogram.

  • Page 619: Fish Position Page

    Functions and dialog boxes Fish Position page The Fish Position information pane shows the position of the detected single fish echoes. The information pane is only available when an Inspection view is "active". Use the Fish page to set up the presentation parameters for the Fish Position information pane. Position The dotted inner circle identifies the low frequency in the sweep.
  • Page 620 Simrad SN90 Reference Manual Details Minimum Threshold Some echoes are stronger than others. If you have noise problems, or you are bothered with for example smaller fish (different species), jellyfish or plankton, you can use the function to adjust the sensitivity. The target Minimum Threshold strength (TS) for a single target must exceed this threshold (in dB) to be accepted.
  • Page 621 Functions and dialog boxes between the samples in the echo are measured. If the angle is too large, the echoes are deleted. If the angle at a given range is too large, this indicates multiple targets. Maximum Gain Compensation This setting applies to both CW and FM operation. Not all single targets are located in the centre of the beam.

  • Page 622: Bottom Detection Page

    Simrad SN90 Reference Manual The value for the should normally be larger than the value for Distance After Target due to the backscattering properties of a target. The values Distance Before Target are specified in meters and are applied on the matched filtered/pulse compressed sample data.
  • Page 623 Functions and dialog boxes If you have problems with bottom detection, you may consider disabling it. This can be useful if you only wish to study targets in the water column. Details Minimum Tilt for Bottom Detection permits you to set a tilt value that makes the Minimum Tilt for Bottom Detection SN90 system stop the bottom detection.

  • Page 624: Fish Size Adjustment Page

    Simrad SN90 Reference Manual Bottom Backstep allows you to manually modify where on the bottom pulse the Bottom Backstep depth shall be detected. The setting does not have an effect on the ability to detect and track the bottom. The peak of the bottom pulse...

  • Page 625: School Mass Adjustment Page

    Functions and dialog boxes Prerequisites dialog box is only available when an Inspection view Information Pane Options is active. Description For each specie, adjust the average size of the fish. Note The measurement accuracy in the Size Distribution information pane depends on the vertical angle of the inspection beam.
  • Page 626 Simrad SN90 Reference Manual You can also open the page by selecting in the information pane. Setup Prerequisites dialog box is only available when an Inspection view Information Pane Options is active. Description For the selected specie, adjust the density.

  • Page 627: Concept Descriptions

    Concept descriptions Concept descriptions Topics Important settings, page 626 Basic sonar theory, page 630 Acoustic noise, page 636 381294/E...

  • Page 628: Important Settings

    Simrad SN90 Reference Manual Important settings Topics AGC (Automatic Gain Control), page 626 TVG (Time Variable Gain), page 627 AGC (Automatic Gain Control) (Automatic Gain Control) function runs an automatic analysis of the echo strength. Based on this analysis the SN90 system maintains a proper dynamic range based on all the current echo values.

  • Page 629: Tvg (Time Variable Gain)

    Concept descriptions The most practical way to use the AGC (Automatic Gain Control) is to first switch it off. Adjust the echo presentation using the normal gain functionality until you have the best possible result, then activate the AGC. The AGC works best with even background (homogenous noise conditions) and pronounced targets.
  • Page 630 Simrad SN90 Reference Manual The loss of energy is explained with two factors. Geometric spread Once transmitted, the acoustic energy will spread out to form a circular beam. The width of this beam increases with the physical distance to the target(s).
  • Page 631 Concept descriptions 40 log R This setting offers larger amplification closer to the bottom. It is commonly used to provide the best echoes from single fish. Other options are provided when this function us used in an Inspection view. The echo presentation in the Inspection view resembles the echogram you see on an echo sounder.

  • Page 632: Basic Sonar Theory

    Simrad SN90 Reference Manual Basic sonar theory Topics Vessel coordinate system, page 631 Layers and deflections, page 633 What is sampling?, page 635 381294/E...

  • Page 633: Vessel Coordinate System

    Concept descriptions Vessel coordinate system The vessel coordinate system is established to define the relative physical locations of system units and sensors. When you have several different sensors and transducers on your vessel, and you wish each of them to provide accurate data, you need to know their relative physical positions. The antenna of a position sensor is typically mounted high above the superstructure, while a motion sensor is located close to the vessel’s centre of gravity.
  • Page 634 Simrad SN90 Reference Manual has been defined by the designer or shipyard. This origin is normally identified with a physical marking, and also shown on the vessel drawings. Frequently used locations are: • Aft immediately over the rudder (frame 0) •...

  • Page 635: Layers And Deflections

    Concept descriptions Layers and deflections Daily operation of the SN90 system may be disturbed by environmental situations that you are unable to control. Typical conditions are temperature and salinity layers, as well as deflections caused by increasing or decreasing water temperature. Topics Temperature and salinity layers, page 633 Sonar beam deflections, page 634...
  • Page 636 Simrad SN90 Reference Manual Sonar beam deflections On warm days – especially during summer – the sea surface will be heated by the sun. The water temperature will gradually decrease with increasing depth. On cold days, you may experience the opposite. The cold water will be close to the surface, and the water temperature increases with increasing depth.

  • Page 637: What Is Sampling

    Concept descriptions What is sampling? The information from the transducer on the SN90 system is a continuous flow of analogue data. In signal processing, sampling is the reduction of this continuous signal to a discrete signal. A common example is exactly what we do in the SN90 system. We convert a sound wave (which is an analogue continuous-time signal) to a sequence of samples (which is a discrete-time signal).

  • Page 638: Acoustic Noise

    Simrad SN90 Reference Manual Acoustic noise Topics Introduction to the acoustic noise challenge, page 636 Contributing factors, page 636 Self noise, page 638 Ambient noise, page 641 Electrical self noise, page 641 Reverberation, page 641 Some means to reduce acoustic noise, page 643...
  • Page 639 Concept descriptions transmitting and receiving systems are key factors during our product development, while our end user documentation aims to help you to make the right filter settings during operation. As for the target properties, there is nothing any of us can do with those. The signal-to-noise ratio, however, can be improved by making the correct choices during installation.

  • Page 640: Self Noise

    Simrad SN90 Reference Manual • Flow noise • Acoustic noise from other hydroacoustic systems The transducer cable is long. Electric noise from generators, pumps, cooling systems and other electric or electromechanical devices is easily picked up. The preamplifiers are very sensitive. They can easily pick up electrical noise from internal and external power supplies.
  • Page 641 Concept descriptions Propeller noise is usually water-borne. In some cases, however, shaft vibrations or vibrations in the hull near the propeller may be structure-borne to the transducer. If a propeller blade is damaged, this may increase the noise considerably. Propeller cavitation is a severe source of noise. "Singing" propellers might be a source of noise, which interferes at discrete frequencies.
  • Page 642 Simrad SN90 Reference Manual Turbulent flow Laminar flow Air bubbles Air bubbles absorb and reflect the sound energy, and they may in worst cases block the sound transmission altogether. The boundary layer increases in thickness when it becomes turbulent. The boundary layer is thin in the forward part of the vessel hull, and increases as it moves aft.

  • Page 643: Ambient Noise

    Concept descriptions Ambient noise Ambient noise is usually not a limiting factor to the performance of sonars and echo sounders. The ambient noise may be split up as follows: • : Air bubbles, seismic disturbances, waves, boundary turbulence, etc. Sea noise •...
  • Page 644 Simrad SN90 Reference Manual There are several types of reverberation. Volume reverberation The volume reverberation is caused by minute plankton and air-bubbles in the water. This reverberation has often daily cycles in intensity. Surface reverberation The surface reverberation depends on the weather condition and the waves.

  • Page 645: Some Means To Reduce Acoustic Noise

    Concept descriptions Some means to reduce acoustic noise Several factors are contributing to the performance of the hydroacoustic equipment used on board a vessel. Careful planning of the installation may reduce the acoustic noise. Unfortunately, it is impossible to simply provide a number of specific procedures to reduce the noise.
  • Page 646 Simrad SN90 Reference Manual Ensure that the propellers blades are correctly designed and without damages. The use of a baffle between the propellers and the transducer may reduce noise appreciably. Static discharges caused by the rotating propeller shaft may be removed by proper grounding or by mounting a coal brush from the shaft to vessel ground.

  • Page 647: Technical Specifications

    SN90 system. They also provide information related to power requirements, physical properties and environmental conditions. Note At Kongsberg Discovery, we are continuously working to improve the quality and performance of our products. The technical specifications may be changed without prior notice.

  • Page 648: Datagram Formats

    Simrad SN90 Reference Manual Datagram formats The SN90 system can send and receive information to and from several different peripherals. All transmissions take place as datagrams with data sentences. Each datagram has a defined format and length. The most common standard is NMEA 0183. The National Marine Electronics...
  • Page 649 Index Index description ..........397 dialog boxes ..........463 about functions ..........463 acoustic noise........... 636 ADCP ambient noise........... 641 placing sensor data in the sonar views ....149 bottom bar ..........375 cavitation..........639 Marker Output page ........520 context-sensitive online help ......
  • Page 650 Simrad SN90 Reference Manual Operating Panel (Mk1)........40 Enabling Coordinated Universal Time (UTC) Pulse Type ..........469 on the bottom bar........159 Sensor Configuration page......570 Bottom Bar Tilt function..........424 General page..........528 Auto Search Bottom Depth Operating Panel (Mk1)........42 General page..........
  • Page 651 Index Inspecting and cleaning the transducer face ..278 Pulse Type ..........469 Operating Panel ........275 contributing factors Processor Unit.......... 274 acoustic noise........... 636 transceiver ..........275 noise ............. 636 Transceiver Unit ........275 Coordinated Universal Time (UTC) Colour Brightness description ..........
  • Page 652 Simrad SN90 Reference Manual Beam Visualization dialog box ...... 458 Bearing function ........426 DataBits Biomass information pane ......365 Serial Port Setup dialog box......498 bottom bar ..........375 Datagram Bottom Detection page........ 620 Sensor Installation page......564, 566 cavitation..........
  • Page 653 Index Lines page ..........606 self noise ..........638 location information ........307 Sensor Configuration page......569 logo and product name ........ 299 Sensor Installation page....... 564 machinery noise........638 Sensors page..........547 Main menu..........382 Serial Port Setup dialog box......497 Map Display page........
  • Page 654 Simrad SN90 Reference Manual Motion Reference Unit page ......571 description ........444, 526 Operation menu ........384 General page..........527 Processed Data to File page ......515 Map Display page........530 Diagnostics Off Centre page ........535 dialog box..........459 Own Ship page .........
  • Page 655 Index Echogram Settings File Name Prefix page ............595 File Setup page ......... 510 Echogram Settings page Processed Data to File page ......517 description ..........595 File Setup page Echogram Type description ..........509 Echogram page......... 611 Files Edit Replay File dialog box ........
  • Page 656 Simrad SN90 Reference Manual Dead Reckoning ........454 Operating Panel (Mk3)........51 Display Gain..........441 Gear symbol Docking Views ......... 446 shortcut menus ......... 413 Fishing Gear ..........450 Gear Symbol Frequency ..........472 description ..........354 function..........442 marker ........... 354 Gain............
  • Page 657 Index Creating a visual presentation of your vessel’s Assigning functions to F1, F2 and F3 on the previous movements ......... 151 Operating Panel (Mk2) ......180 Visual Objects menu........406 Assigning functions to the rotary switches on hoist/lower switch the Operating Panel ........178 hoisting the transducer ........
  • Page 658 Simrad SN90 Reference Manual Inspecting and cleaning the transducer face ..278 Selecting which map elements to include in the install navigation and other sensors display presentation ........153 (summary) ..........195 Selecting which presentation modes to Installing a new version of the operating choose from at the bottom of the display software..........
  • Page 659 Index Hull Unit page Inspecting and cleaning the display ....274 description ..........554 Inspecting and cleaning the Operating Panel ..275 Hyperbolic Frequency Modulation (HFM) Inspecting and cleaning the Processor Unit ... 274 Pulse Type ..........470 Inspecting and cleaning the transceiver....275 Inspecting and cleaning the Transceiver Unit..
  • Page 660 Simrad SN90 Reference Manual registered trademark........13 top bar ........... 299 K301 (hoisting contactor) logo and product name hoisting the transducer ........ 193 description ..........299 K302 (lowering contactor) top bar ........... 299 lowering the transducer ....... 193 longitude Keep Display Range top bar ...........
  • Page 661 Index Gear Symbol..........354 Active............ 397 Own Ship Marker ........38, 353 Active: functions and dialog boxes ....463 Place Marker ......38, 45, 55, 347 Cosmetics ..........409 rulers (description)........356 Display ..........387 Target Marker .......... 350 Display: functions and dialog boxes ....438 Marker hiding ..........
  • Page 662 Simrad SN90 Reference Manual Relay Output page ........522 self noise ..........638 Sensor Installation page....... 566 sources........... 636 Motion Reference Unit Noise adjusting the offset........225 page ............552 inserting installation parameters ..... 222 Noise Filter function page ............571 description ..........
  • Page 663 Index Selecting Inactive mode......... 89 decreasing..........92 Selecting Normal mode ......66, 87 increasing ..........92 operating panel overview assigning custom user settings ....... 176 computer ..........23 assigning presentation modes ......176 Processor Unit..........23 placing a marker ........108 Own Ship selecting which operating panel to use....
  • Page 664 Simrad SN90 Reference Manual Units ............. 584 placing a marker User Settings Setup ........602 using operating panel........108 Vertical View Orientation......535 Plane Water Column .......... 541 view............338 painting Plane view Painting the transducer face ......281 description ..........338...
  • Page 665 Index maintenance personnel ........ 272 Choosing a map provider ......154 maintenance schedule ......... 270 Choosing screen capture mode....... 139 preventive maintenance Choosing the colours used to present the computer ..........274 echoes ..........163 display ........... 274 Choosing the fishing gear in use ..... 115 Hull Unit ..........
  • Page 666 Simrad SN90 Reference Manual Making a noise/speed curve to determine vessel Setting up the presentation of the depth lines in noise............ 260 the map ..........154 Measuring flow noise........264 Setting up the serial and Ethernet (LAN) port measuring noise in passive mode ....258 parameters ..........
  • Page 667 Index purse depth Defining the file and folder settings for data Vertical view..........333 recording..........127 Push (Rotary Switch Functions) Defining the processed data recording Operating Panel page (Mk3) ......593 parameters ..........133 echo data ..........128 processed data .......... 134 Recording System Protection page .......
  • Page 668 Simrad SN90 Reference Manual view............148 Water Column page........542 reverberation..........119 sampling description ..........641 description ..........635 reducing ..........119 Save Reducing bottom and surface reverberation Export dialog box ........461 with the RCG (Reverberation Controlled Marker Output page ........520 Gain) function ........
  • Page 669 Index search area Set Priority Marker adjusting the radius ......... 67, 99 shortcut menus ......... 412 Sector Set Priority Target Bearing function ........427 Operating Panel (Mk3)........51 Tilt function..........425 setting up security communication ports ........197 network............ 31 Operating Panel ........
  • Page 670 Simrad SN90 Reference Manual Screen Captures dialog box ......456 Speed Vector Single Ping Visual Objects menu........407 Transmission Mode function ......431 speed/noise size measuring ..........260 measuring the size of a school relative to the speed/noise curve purse seine..........110 making ..........
  • Page 671 Index this publication ........... 13 Inspection view ........337 Target Marker selecting ..........160 Operating Panel (Mk3)........50 top bar target markers depth ............. 310 exporting ..........183 geographical position........307 Target markers Help............311 description ..........350 Hull Unit ..........304 Target Threshold information panes........
  • Page 672 Simrad SN90 Reference Manual bottom bar ..........376 Software License page ........ 604 Transceiver Unit description ..........25 preventive maintenance ....... 275 Transceiver Upgrade units page ............605 selecting measurement units......164 Transceiver Upgrade page Units page description ..........605 description ..........
  • Page 673 Index Vertical view..........333 water depth Vertical Reference function top bar ........... 310 description ..........488 Weak Vertical TX Sector AGC (Automatic Gain Control) ..... 481 function..........477 Noise Filter function........486 Vertical view..........330 RCG (Reverberation Controlled Gain) Vertical TX Sector function function ..........
  • Page 674 ©2023 Kongsberg Discovery AS...
  • Page 676 Kongsberg Discovery AS / Simrad Telephone: +47 33 03 40 00 Strandpromenaden 50 P.O.Box 111 Horten E-mail sales: simrad.sales@simrad.com Norway E-mail support: simrad.support@simrad.com www.kongsberg.com/simrad...

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