Kongsberg EA 400 Operator's Manual
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Kongsberg EA 400 Operator's Manual

Single beam hydrographic echo sounder
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Operator Manual
EA 400
Single beam hydrographic echo sounder
(CD6562a)

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Summary of Contents for Kongsberg EA 400

  • Page 1 Operator Manual EA 400 Single beam hydrographic echo sounder (CD6562a)
  • Page 3 857-160981 EA 400 Single beam hydrographic echo sounder Operator manual...
  • Page 4 The information contained in this document is subject to change without prior notice. Kongsberg Maritime AS shall not be liable for errors contained herein, or for incidental or consequential damages in connection with the furnishing, performance, or use of this document.
  • Page 5 Operator manual Chapters System description This chapter presents a general description of the echo sounder system. Refer to page 1. Display views This chapter explains the layout of the echo sounder display presentation. Refer to page 24. Getting started This chapter provides an operational example to get you started with the operation.

  • Page 6: Table Of Contents

    EA 400 Table of contents SYSTEM DESCRIPTION ........
  • Page 7 Operator manual GETTING STARTED ......... . . Introduction .
  • Page 8 EA 400 Record and playback ......... . .
  • Page 9 Operator manual Depth Output ..........Echogram .
  • Page 10 EA 400 Profile name ..........

  • Page 11: System Description

    System description SYSTEM DESCRIPTION Introduction This chapter provides a brief introduction to the EA 400 hydrographic echo sounder system. Related topics → Overview, page 2 → System drawing, page 4 → Wave propagation, page 9 → Bottom echo, page 11 →...

  • Page 12: System Overview

    It can operate with maximum four frequency channels simultanously. • The EA 400 system is flexible and easy to configure due to the modular design. • The EA 400 is available in two versions. The standard EA 400 system uses a 15 inch LCD with integrated computer, while the EA 400P and EA 400SP are portable systems.
  • Page 13 • An external push button may be added for manual control of the event triggering. • Socket interface is included. To run the EA 400 software and other software (for example survey- or classification software) on the same computer, this socket interface is required for data transmission between the software packages.

  • Page 14: System Diagrams

    EA 400 System diagrams The following system diagrams are provided: • EA 400 with one transceiver • EA 400 with two transceivers • EA 400 with Hydrographic Operator Station (HOS) and two transceivers • EA 400SP portable system 857-160981 / I...
  • Page 15 System description System diagram with one transducer 1) Display unit 2) Processor unit 3) General Purpose Transceiver (GPT) 4) Transducers 857-160981 / I...
  • Page 16 EA 400 System diagram with two transceivers 1) Display unit 2) Processor unit 3) General Purpose Transceiver (GPT) 4) Transducers 5) Ethernet HUB or switch 857-160981 / I...
  • Page 17 System description System diagram with Hydrographic Operator Station (HOS) and two transceivers 1) Hydrographic Operator Station (HOS) 2) General Purpose Transceiver (GPT) 3) Ethernet HUB or switch 4) Transducers A) Navigational data B) Motion sensor data 857-160981 / I...
  • Page 18 EA 400 Portable system. IP56-rated suitcase with standard laptop or rugged notebook. 1) Portable computer 2) DC/AC power converter 3) General Purpose Transceiver (GPT) 4) Transducers A) Navigational data B) Motion sensor data C) Depth data D) 12 Vdc power E) Transducer data F) Network connection...

  • Page 19: Wave Propagation

    Figure 1 The wave propagation principles The EA 400 transmits high energy sound wave pulses into the sea. A flat bottom reflects the transmitted wave as if it were a mirror. The propagating energy is spread over a larger and larger area as it travels down to the bottom and up again.
  • Page 20 EA 400 Propagation losses due to absorption are much higher in sea water than in fresh water. Absorption also increases with frequency. At 38 kHz the absorption is 0.5 dB/km in fresh water and 10 dB/km in sea water. At 200 kHz the absorption is 10 dB/km in fresh water and 50 dB/km in salt water.

  • Page 21: Bottom Echo

    Whenever the quality of a detection is questionable the algorithm outputs a depth of 0.00 to indicate that no reliable detection was obtained. The EA 400 algorithm is designed to handle a number of difficult situations. The algorithm maintains bottom lock for a discontinuous jump in bottom depth. It avoids false bottom detections on a dense school of fish.
  • Page 22 EA 400 The bottom detection algorithm locks to the first good bottom return. The depth at point A rather than the depth along the transducer axis will be output for a sloped bottom. The detected depth value is always smaller than the depth along the transducer axis implying that a safety margin is automatically included.

  • Page 23: Sidescan

    The software in the EA 400 is prepared for dual sidescan operation and presentation. The sidescan data is captured and stored in a digital format. This allows for further data processing to a sidescan sonar mosaic image by combining data from a number of survey lines.

  • Page 24: Observation Range

    EA 400 Observation range Absorption increases dramatically with frequency in salt water. For maximum observation range you should select a low operating frequency, a large transducer and the maximum transmit power. Maximum detection depth Transducer Frequency, Pulse Beam Band Transmit...

  • Page 25: Technical Specifications

    System description Technical specifications The following is a summary of the technical specifications for the EA 400 echo sounder. Note that the specifications may be changed without prior warning. Related topics → Portable system, page 16 → Echo sounder system, page 17 →...

  • Page 26: Portable Echo Sounder System

    EA 400 Portable echo sounder system • Frequency channels: 1 or 2 channels • Operating frequencies: 33, 38, 50, 120, 200, 210 and 710 kHz • Echogram types - Surface echogram - Bottom expansion • Gain function: 20 log TVG, 30 log TVG, 40 log TVG or None •...

  • Page 27: Echo Sounder System

    System description Echo sounder system • Frequency channels: 1, 2, 3 or 4 channels • Operating frequencies: 33, 38, 50, 120, 200, 210 and 710 • Echogram types: - Surface echogram - Bottom expansion • Gain function: 20 log TVG, 30 log TVG, 40 log TVG or none.

  • Page 28: External Interfaces

    EA 400 External interfaces Numerous external interfaces are provided for the EA 400 echo sounder system. Outputs • Echogram printer (Centronics parallel) • Depth data (NMEA, Simrad or Atlas) • Echogram (only on Ethernet) • Navigation • Relay navigation • Motion sensor •...

  • Page 29: General Purpose Transceiver (Gpt)

    System description General Purpose Transceiver (GPT) • Transmit power: Max 2 kW (Single or Dual frequency transceiver) • Receiver noise figure: 3 dB • Transducer impedance: 60 ohms • Output protection: Short circuit and open circuit protection • Receiver input range: Instantaneous dynamic amplitude range -160 dBW to -20 dBW (dB relative to 1W) •...

  • Page 30: Processor Unit

    EA 400 Processor Unit The Processor Unit comprises a standard personal computer. It may be provided locally, but the following specifications are recommended: • Processor: Pentium 400 MHz • Memory capacity: 2568 Mb • Hard disk capacity: 40 GB • Disk drives - 1.44 Mb floppy...

  • Page 31: Operator Station

    System description Operator Station The EA 400 is supplied with the HOS 152 Operator Station This is a 15-inch display with a built-in computer. Optionally, the larger HOS 192 can be supplied. Earlier systems included the HOS 151 or HOS 181.

  • Page 32: Pc For Portable System

    EA 400 PC for Portable system The portable echo sounder can be supplied with either a standard laptop or a rugged tablet personal computer. The following minimum specifications are recommended: • Processor: Pentium M • Memory capacity: 256 Mb • Hard disk capacity: 40 GB •...

  • Page 33: Ethernet Hub

    Ethernet HUB When more than one General Purpose Transceiver is supplied, the EA 400 will be supplied with an Ethernet HUB. Several different switches are available. A standard commercial is HUB supplied with the echo sounder, unless a specific type is specified by the customer.

  • Page 34: Display Views

    EA 400 DISPLAY VIEWS Introduction This chapter provides a brief overview of the information displayed by the EA 400, and how it is organised. Related topics → Display layout and main view, page 25 → Menu bar, page 29 →...

  • Page 35: Display Organisation

    Display views Display organisation Main view The EA 400 display is organised as follows (from top): • Menu bar • For each transceiver channel: - One header view - Two echo frames • Status bar A single channel display is shown below as an example.

  • Page 36: Moving The Boundary Lines

    EA 400 Menu The Menu bar contains the echo sounder’s main menu. A single click on one of the menu names will provide a new drop-down menu where additional choices can be made. Header For each channel, the Header view contains the current operational mode and frequency, the current depth, and the colour scale.

  • Page 37: Direct Access To Dialogue Boxes

    Display views Direct access to dialogue boxes Several dialogue boxes are directly accessed from the various views on the display. Position the cursor, and right-click on the... • Mode and frequency information in the Header view to open the Transceiver Settings dialogue box. •...
  • Page 38 EA 400 Related topics → Status window, page 145 → Menu bar, page 29 → Header view, page 30 → Echo frames, page 31 → Getting started; Operation, page 44 → Status bar, page 36 → Transceiver Settings, page 155 →...

  • Page 39: Menu Bar

    Display views Menu bar Main menu The EA 400 Menu bar contains the (CD6744B / BM300B) (1) The main menu The main menu has the following options: • File • View • Options • Interfaces • Install • Step! • Help To operate, click on the menu name and observe the drop-down menu.

  • Page 40: Header View

    EA 400 Header view The EA 400 Header view is shown directly above the two Echo frames. The top Header view is thus located just below the Menu bar. The Header view contains the following information. (CD6744C / BM300B) (1) Transceiver settings: Current mode and frequency...

  • Page 41: Echo Frames

    Display views Echo frames Overview The EA 400 Echo frames are the main information bearer on the echo sounder display. The Echo frames are usually presented in pairs with two echo frames for each channel. The Echo frame contains the following views: •...

  • Page 42: Echogram And Range

    EA 400 Echogram and Range The Echogram and Range view consists of an Echogram field to the left and a Range field to the right. These are separated by the vertical range axis. The Echogram field contains information about the acoustical values, while the Range field is used for specifying the range used in the Echogram field.

  • Page 43: Scope

    Display views Scope The Scope view is the rightmost view and shows a oscilloscope view of the last ping corresponding to the settings in the Echogram view. This view draws a range of horizontal symmetrical colour lines. The distance from the vertical centre axis and the line colour reflects the received echo amplitude.

  • Page 44: Sidescan

    EA 400 Sidescan If the necessary transducers are available, the EA 400 can be set up as a “sidescan sonar” with only a few easy commands. Two echograms are used, but a third channel may be added to show the current depth, provided that suitable hardware is installed.
  • Page 45 Display views To export the position of an object, click on the left mouse button in the side scan echogram view. The position will be displayed in the status bar (bottom left of the display). Simultaneously this position is also marked in the view by a red cross.

  • Page 46: Status Bar

    EA 400 Status bar The EA 400 Status bar is located at the bottom of the display. It contains the following information: (CD6744E / BM300D) (1) Information applicable for the current operation (2) Event number (3) Printer logo (when printer is active)

  • Page 47: History And Printer Views

    Display views History and printer views Overview The echogram information provided on the display will differ slightly from the information provided on the printer and in the History files. This is because the annotation settings differ between the two media. The annotations provided for display output are controlled by the Annotations dialogue box.

  • Page 48: Printer Example

    EA 400 Printer example A printout from the echo sounder is shown below. (CD10210) Figure 5 History and printer presentation From the top left corner, you can see the following annotations. (1) A depth annotation. This information will automatically appear at regular intervals, and whenever you change the echo sounder’s depth range.
  • Page 49 Display views (4) One Event annotation with both navigational and time information added. This annotation is controlled by the Annotation parameters in the dialogue box. It will only appear on the printer output and in the History when you press the Event number in the Status bar.

  • Page 50: Getting Started

    Introduction This chapter will guide you through the main operations of the EA 400 by the use of an operational example. The intention with this chapter is to provide you with an overview of the main functions in the echo sounder, and to demonstrate how the EA 400 may be used in a realistic operational situation.

  • Page 51: Before You Start

    Getting started Before you start Before you start the EA 400, make sure that the necessary hardware items are correctly installed and connected. The transducer(s) must also be defined in the EA 400 software on the computer. Related topics →...

  • Page 52: Start-Up

    Environmental parameters To obtain correct values for the various acoustical parameters calculated by the EA 400 program, it is important that you provide the EA 400 program with accurate parameters describing the environment; sea temperature, salinity and sound velocity.

  • Page 53: Navigation Interface

    Click OK when you have finished. Navigation interface To link acoustical data with navigational data the EA 400 must be able to receive data provided by a GPS or another positioning system. The Navigation Interface dialogue box is used to define the parameters to achieve this.

  • Page 54: Operation

    This chapter describes a few of the most common functions used during normal operation. Selecting operational mode You are now ready to start the actual operation of the EA 400 echo sounder. The first thing to do is to choose operational mode.

  • Page 55: Bottom Detector Settings

    The Bottom Detector dialogue box is used to define various parameters associated with the bottom detection. These include the depth range, where the EA 400 searches for the bottom. The EA 400 can also use the Detect Second Layer Bottom function when using depth from a high frequency transducer.
  • Page 56 EA 400 Echogram field The Echogram field is used to display acoustical values for Colour Scale each ping. The settings in the are used to determine the colour sensitivity in the echogram. Position the cursor in the Echogram field, and click the right mouse button to open the Echogram dialogue box.

  • Page 57: Scope View

    Getting started When you place the cursor in the Echogram field, you can use the mouse wheel to modify the receiver gain level, and hence the display colour sensitivity. Each click of the wheel corresponds to a 1 dB change. The same colour sensitivity Color Scale setting is available from the dialogue box.

  • Page 58: Data Storage

    If the directory does not exists it will be created. Default directory is EA 400\data\ Click the Save Raw Data check box to save raw data. Define maximum file sizes by entering the desired value in the Max File Size box, and click OK to accept the settings.
  • Page 59 Getting started Note that the depth range used for data collection and data storing is determined from the maximum range settings in the Echogram view, the bottom detection settings, the settings for Echogram Parameters, and the settings in the Network Interface dialogue box.

  • Page 60: Operational Procedures

    EA 400 OPERATIONAL PROCEDURES Overview This chapter contains a number of specific procedures to be used with your EA 400 echo sounder. Related topics → Power on/off, page 51 → Basic operations, page 53 → Transceiver installation, page 58 →...

  • Page 61: Power On/Off

    All frequency channels must be properly installed. Options Select Factory settings in the menu. Power off To switch off the EA 400 echo sounder, observe the following procedure. File Select Exit on the menu. Allow the computer to close all the EA 400 software applications.
  • Page 62 EA 400 When the EA 400 software has closed down, you may wish to close down the computer as well. Click on the Start button in the lower left corner of the display. Exit the operating system in the normal manner.

  • Page 63: Basic Operations

    Operational procedures Basic operations Overview This chapter presents a number of common procedures frequently carried out on the EA 400 echo sounder. Changing the echogram settings To change the echogram settings: Position the cursor in the Echogram field. Click the right mouse button.

  • Page 64: Changing The Transmit Power

    EA 400 For example, a pulse length of 1.024 millisecond gives a vertical resolution of 19.2 cm, whereas a pulse length of 0.256 millisecond gives a vertical resolution of 4.8 cm. If the vertical distance between two echoes is less than this, the two echoes...

  • Page 65: Setting Minimum And Maximum Depth

    Operational procedures Setting minimum and maximum depth Setting the minimum and maximum depth controls where the echo sounder will search for bottom lock. Note Setting both Minimum Depth and Maximum Depth to 0 m will turn off bottom detection. Position the cursor over the depth information in the Header view, and click the right mouse button.

  • Page 66: Adding Annotations

    EA 400 Adding annotations You can add several different annotations to the displayed and printed information. All annotations are automatically displayed, while you need to enable the annotations to be printed. Enable annotations to be printed File Select Print on the menu.
  • Page 67 Operational procedures Status bar e Click the Event button on the every time you wish the annotation to be added to the display and/or print. Enable external annotations The echo sounder will accept external text annotations when these are input on the serial line and Ethernet. This function is permanently enabled.

  • Page 68: Transceiver Installation

    EA 400 Transceiver installation Overview Use the following procedures to install, modify or delete frequency channels from the echo sounder set-up. General Purpose Transceivers (GPT) physically connected to the echo sounder’s Ethernet interface are identified automatically by Transceiver Installation the system. When you open the dialogue box from the Install menu, a list will be provided.

  • Page 69: To Modify An Ip Address

    Operational procedures Select the alternative NONE in the Transducer Selection list. Click OK to accept the choice and exit the dialogue box. Restart the echo sounder as described below. Related topics → Transceiver Installation, page 153 To modify an IP address This procedure allows you to modify the IP address of the currently selected General Purpose Transceiver (GPT).

  • Page 70: Record And Playback

    EA 400 Record and playback Overview You can set up the echo sounder to record the unprocessed transducer signals on the internal harddisk or other recordable media. This recorded signal may later be injected into the echo sounder’s processing software as if it arrived directly from the transceiver.
  • Page 71 Operational procedures Enter the maximum size of the storage files. Select the initial line number. Enter the maximum size of each replay file. Click Ok. Start recording Status Use the Line field in the bar to start the recording. Position the cursor over the Line field. Press the left mouse button.

  • Page 72: Playback

    EA 400 Example: With range = 10 m, pulse length = 256 µS, 15 pings per second and sound velocity = 1500 m/s, the storage requirement will be 45 Mb per hour. If you increase the range to 80 m, and reduce the ping rate to 7 pings per second, the storage requirement will be 60 Mb per hour.

  • Page 73: History

    Operation - Observe the dialogue box appear. Click Browse to select disk directory. - Default directory is EA 400\history\ Create a new directory if required. Click Save in the History field, or Optionally, click Synchronize with logfile in the History field.
  • Page 74 EA 400 To stop History recording: Select Operation on the File menu. - Observe the Operation dialogue box appear. De-select Save. Click Ok. Playback To view the information recorded by the History function: View Select History on the menu. History Browse the information in the dialogue box.
  • Page 75 Operational procedures Press the left printer icon (with the sign) in the lower right corner of the History window. Press the Ctrl key on the keyboard and the left mouse button simultanously to select the images to be printed. Press the right mouse button, observe the shortcut menu. On the shortcut menu, select Print.

  • Page 76: Software Installation And Upgrades

    Use this procedure if you wish to reinstall the software, or receive a new CD-ROM with a software upgrade. Power up the computer, and allow the EA 400 to start. Close the EA 400 program by selecting File - Exit.

  • Page 77: Un-Installation Procedure

    Un-installation procedure Use this procedure if you need to remove all the echo sounder software from the computer. Note that all data in the EA 400 directory will be erased. Power up the computer. Insert the EA 400 CD-ROM.

  • Page 78: Sensor Setup

    EA 400 Sensor setup Overview In order to ensure that the data from the vessel’s heave sensor are interpreted and used correctly by the echo sounder, you must position the heave sensor’s location in respect to the transducer. Both locations are then referenced to the vessel’s global Reference point.

  • Page 79: Procedure

    Operational procedures • Forward position (X) - Forward position is defined on the X-axis (refer to the illustration below). Locations further forward than the reference point are positive. • Downward position (Z) - Downward position is defined on the Z-axis (refer to the illustration above). Locations below the reference point are positive.

  • Page 80: Sidescan

    120 and 200 kHz transducers have been specially designed for this purpose. With only a few simple commands, you will turn your EA 400 into a “side looking sonar”. Figure 8 Typical dual sidescan view...

  • Page 81: Starting A Sidescan Survey

    All changes made to parameters and views will be stored when closing the EA 400. You may wish to view the echograms using a grayscale presentation, as this will enhance the sidescan view.

  • Page 82: Superimpose The Current Depth

    EA 400 Superimpose the current depth If your echosounder is equipped with a third (or fourth) channel and a transducer pointing straight down, you can superimpose the current depth into the sidescan view. Click the right mouse button in one of the two echograms to open the Echogram dialogue box.

  • Page 83: Reference Guide

    Reference guide REFERENCE GUIDE Overview This chapter describes the menus and dialogue boxes in detail. Related topics → Echo sounder menus, page 74 → Dialogue boxes, page 84 → Status bar, page 82 857-160981 / I...

  • Page 84: Menus

    EA 400 Menus Main menu The Main menu contains the following options: → File, page 75 → View, page 76 → Options, page 77 → Interfaces, page 79 → Install, page 80 → Step, described below. → Help, page 81 Note that a number of dialogue boxes are accessed directly using right-click on certain display fields.

  • Page 85: File Menu

    Reference guide File menu The following commands are available on the File menu: → Operation, page 125 → Store, page 146 → Annotation, page 89 → Print, page 128 → Exit, page 107 Operation Operation This command option opens the dialogue box.

  • Page 86: View Menu

    EA 400 View menu The View menu contains the following options: → Layout, page 117 → History, page 113 Layout Layout This command opens the dialogue box. Use it to modify the layout of frequency channels on the display. History...

  • Page 87: Options Menu

    Reference guide Options menu The following commands are available on the Options menu: → Language, page 116 → Depth unit, see below → Temperature unit, see below → Palette, see below → Beeper, see below → Save settings, see below →...
  • Page 88 EA 400 Beeper This entry activates a submenu to control when the audible warning signal is active to alert about status messages and alarms. No dialogues are provided. Save settings The echo sounder memorises all its parameter settings between power is turned off until it is turned on again at a later time. The Save Settings entry writes a snapshot of all parameter settings into static memory.

  • Page 89: Interfaces Menu

    Reference guide Interfaces menu The following commands are available on the Interfaces menu: → Network Interface, page 122 → Serial Interface, page 142 → Remote Display, page 133 → Raw Data, page 132 Network Interface Network Interface This command option opens the dialogue box.

  • Page 90: Install Menu

    EA 400 Install menu The following commands are available on the Install menu: → Transceiver, page 153 → Environment, page 104 → Navigation, page 119 → Heave, page 110 → Temperature, page 152 → Heading, page 109 Transceiver Transceiver Installation This command opens the dialogue box.

  • Page 91: Help Menu

    Microsoftt. The content of the on-line user manual is identical to the content of the EA 400 Operator Manual. The on-line manual is also accessed directly as context sensitive help from the various dialogue boxes used throughout the echo sounder software.

  • Page 92: Status Bar

    EA 400 Status Bar The Status Bar displays status messages, event number, printer active symbol, temperature, survey line number, navigational data, time of day and ping replay timer. (CD6744E / BM300D) The following information is provided on the Status bar: Information - Various messages are displayed in this field;...
  • Page 93 Reference guide Time - Local time of day is displayed. A small popup window showing the current date appears when positioning the cursor inside the time field. During replay, this field is used as a timer. Related topics → Recording procedure, page 60 →...

  • Page 94: Dialogue Boxes

    EA 400 Dialogue boxes Introduction The following chapters describe in detail all the dialogue boxes used in the EA 400 echo sounder. The dialogue boxes are presented in alphabetical order. → → Advanced Navigation, page 85 Status window, page 145 →...

  • Page 95: Advanced Navigation

    Operator manual Advanced Navigation The Advanced Navigation dialogue box is accessed from the Navigatiuon Interface dialogue box. The Navigation Interface dialogue box is in turn available from the Install menu. NMEA Position sentence These boxes specify which type of NMEA navigation sentence should be automatically interpreted.
  • Page 96 EA 400 Start sequence - Maximum six characters used to identify the type of input. The question marks are used as “wild card” characters. You can enter any format you wish. No. of fields - Identify the total number of fields in the ASCII message.

  • Page 97: Advanced Transceiver

    Operator manual Advanced Transceiver Transceiver Settings This dialogue box is accessed from the dialogue box. It displays detailed numeric information characterising the channel. This includes transducer parameters, exact transmit frequency and receiver processing parameters. Parameters The parameters shown in this dialogue box are determined during the transceiver installation procedure.
  • Page 98 Sound velocity [m/s] - The speed of the sound through the water varies with temperature, salinity and pressure. The soundings provided by the EA 400 are compensated for this. Sample interval [m] - This value is always 1/4 of the current pulse length.

  • Page 99: Annotation

    File The Annotation dialogue box is opened from the menu. The EA 400 echo sounder supports these different types of annotation: • Text - use this function to enter your own text. • Time - use this annotation to automatically generate a time marker at specified intervals.
  • Page 100 EA 400 Text The annotation text is entered here. Note that you need to have a keyboard connected to the echo sounder. The text can be entered freely, for example ”Dangerous wreck”. When you press the OK button the text is written into the echogram. The next time you open the Annotation dialogue box, the text is cleared, and you must enter new information.
  • Page 101 Operator manual Events may also be generated from an external source by toggling pin 9 on the Auxiliary connector on the General Purpose Transceiver (GPT). This event will use the same settings as for the Event toggle button on the Status bar. Related topics →...

  • Page 102: Bottom Detector

    EA 400 Bottom Detector The Bottom Detector dialogue box is opened when you right-click on the numeric depth value in the Header view on the display. This dialogue box is used to define the upper and lower depth limits most likely to be used during the echo sounder operation.
  • Page 103 This allows the EA 400 to verify that the correct bottom depth has been located. If the value you enter is too large (close to 0 dB) the adjustments will be very small.

  • Page 104: Bottom Range

    EA 400 Bottom Range The Bottom Range dialogue box opens if you click the right mouse button in the range field in the Echogram and Range view while operating with a Bottom Range echogram. The dialogue box will also open when selected in the Echogram Parameters, Network Interface and Store dialogue boxes.

  • Page 105: Colour Scale

    Operator manual Colour Scale The Colour Scale dialogue box is opened when you right-click on the colour scale in the Header view. This dialogue controls the mapping of echo strength into one out of 12 colours, light blue for weak signals and dark brown for strong signals.
  • Page 106 EA 400 40 log TVG - This parameter controls the display sensitivity of the echo sounder when 40 log TVG is selected in the Echogram dialogue box. A numeric value of 20 sets the lower limit of the echogram colour scale equal to a target strength of -20 dB.

  • Page 107: Depth Output

    • The $SDDPT telegram contains the depth below the transducer and the distance between the transducer and the waterline. The EA 400 can also output the EA 500/EK500 compatible depth telegrams; D1, D2 etc. Output for Atlas echo sounders are also provided.
  • Page 108 EA 400 More information about the NMEA datagrams can be found in the Data formats chapter. Related topics → Heace Sensor, page 110 → Navigation Interface, page 119 → NMEA datagrams, page 183 857-160981 / I...

  • Page 109: Echogram

    Operator manual Echogram The Echogram dialogue box is opened by right-clicking on the echogram in the Echogram and Range view on the display. This dialogue is used to control the type and presentation of the echograms. 857-160981 / I...
  • Page 110 Surface - Auto Range - The echogram is related to the sea surface. Start depth is manually selected in the Surface Range dialogue box. The EA 400 performs automatic adjustment of the vertical range keeping the bottom echo inside the visible echogram.
  • Page 111 Operator manual Horizontal Depth Lines Scale - Equidistant horizontal scale lines are drawn inside the echogram in the current foreground colour; black during day and white during night. A maximum of 50 scale lines can be drawn. No scale lines are drawn when the scale line count is set to zero.
  • Page 112 EA 400 No - No TVG is applied. The echogram displays the input power level at the transducer terminals. This echogram type is used for test and research purposes. 20 log - 20 log TVG is applied. The echogram displays volume backscattering strength and surface backscattering strength below the detected bottom.

  • Page 113: Echogram Parameters

    Operator manual Echogram parameters The Echogram Parameters dialogue box is opened by left-clicking on Echogram Storage under the Interfaces menu. Note This dialogue box is available for echo sounders with software version up to 2.1.1.1. This dialogue is used to control the datagrams exported by the echo sounder on the serial lines.

  • Page 114: Environment

    Many other echo sounders are calibrated to a sound velocity of 1500 m/s. If the EA 400 is used together with other sounders it is advantageous to adjust the sound velocity on the EA 400 as well, in order to have the same depth readings.
  • Page 115 ASVP. A default file containing a constant 1500 m/s profile is found in the folder c:\EA 400\data. The sound velocity profile can also be modified during replay, but only if the Change SVP Profile box in the Replay dialogue has been checked before the replay commence.
  • Page 116 Unless otherwise defined, the received file(s) will be stored in the following directory: c:\EA 400\data. When a sound velocity profile is received by the EA 400, a pop-up dialogue box will inform you. In this dialogue, you must press Ok to use the profile as it is, or Edit if you wish to inspect and/or edit it using the SVP Editor.

  • Page 117: Exit

    Operator manual Exit The Exit command is available from the File menu. Select this command to terminate the echo sounder program. Note You must always use this command before you turn off power! Related topics → File, page 75 857-160981 / I...

  • Page 118: Factory Settings

    Third, the echo sounder is restarted using the default settings chosen by Kongsberg Maritime. These are considered generic, and they are the same settings as when you first switched on the echo sounder.

  • Page 119: Heading

    Heading The Heading dialogue box is accessed from the Install menu. If you wish your echogram and detected bottom depth to be heading corrected, you need to connect the EA 400 to a heading sensor. NMEA HDT - Check this box to enable heading sensor datagrams in HDT format.

  • Page 120: Heave Sensor

    The Heave Sensor dialogue box is accessed from the Install menu. If you wish your echogram and detected bottom depth to be heave corrected, you need to connect the EA 400 to a heave sensor. Source Selection Off - Disregard all heave input.

  • Page 121: Sensor Setup

    Operator manual Analog - Heave sensors with analogue outputs are connected directly to the Auxiliary Connector of the nearest General Purpose Transceiver (GPT). Select the appropriate transceiver from the list of installed transceivers. Each entry in the list contains transceiver type, operating frequency and unique identifier.
  • Page 122 EA 400 Related topics → Depth Output, page 97 → RS-232 Setup, page 140 → Sensor Setup, page 141 → Positioning the heave sensor, page 68 → NMEA data formats, page 169 857-160981 / I...

  • Page 123: History

    The echograms stored in the history files are available on *.BMP format on the harddisk. A directory for these were created during the installation: c:\EA 400\history. Recording, browsing and printing the history information is described in the Operational procedures chapter. More detailed information about the History window is provided in the Display views chapter.

  • Page 124: Ip Address

    As long as the EA 400 operates as a stand-alone system using the hardware supplied by Kongsberg Maritime, you will not need to change anything.
  • Page 125 Operator manual Class B used on medium size networks: 10NNNNNN NNNNNNNN HHHHHHHH HHHHHHHH Class C used on small networks: 11NNNNNN NNNNNNNN NNNNNNNN HHHHHHHH The address class is determined from the high-order bits of the first byte. • The first byte of a Class A address contains a zero and seven network bits.

  • Page 126: Language

    EA 400 Language The Language dialogue box is accessed from the Options menu. Use this dialogue to select operational language. 857-160981 / I...

  • Page 127: Layout

    Operator manual Layout The Layout dialogue box is accessed from the View menu. Installed frequency channels are visible on the display or hidden. This dialogue box controls how many frequency channels are visible and their layout on the display. Arrangement Visible frequency channels are vertically or horizontally arranged on the display.

  • Page 128: Load User Settings

    EA 400 Load user settings The Load user settings dialogue box is accessed from the Options menu. Use this dialogue to load previously saved settings. To save settings, select Store User Settings on the Options menu. The information and current echo sounder settings stored with this function are listed with the Store user setting dialogue box description.

  • Page 129: Navigation Interface

    Install menu. A navigation receiver or other navigational instrument can be connected to a RS-232 port of the EA 400 Processor Unit. The input may be either standard NMEA datagrams or user specific ASCII datagrams. Standard NMEA datagrams are automatically interpreted, like the GGA and GLL navigation sentences.
  • Page 130 Use these parameters to specify the vessel’s speed. Serial - to be used if navigational data is input on a serial line from an external source into the EA 400. The current vessel speed value is shown (when external speed input is selected).
  • Page 131 Operator manual Clear - This button clears the list of input telegrams. Note that no information is displayed when the network interface (Ethernet) is used to accept the data. Depth Output This opens the Depth Output dialogue box. RS-232 This button activates the RS-232 Setup dialogue box. This box is used to define communication port, baud rate etc.

  • Page 132: Network Interface

    EA 400 Network Interface The Network Interface dialogue box is opened from the Interfaces menu. The dialogue box is used to: • Identify the peripheral computer system the echo sounder shall communicate with 857-160981 / I...
  • Page 133 Operator manual • Identify the local computer input port • Define which datagrams the EA 400 shall export on the network Depth output The depth information from the echo sounder can be exported on two different formats; Simrad and NMEA. If required, both formats can be exported simultaneously.
  • Page 134 This is the network port that the echo sounder will “listen” on for reception of the different input datagrams. On the EA 400 system, the port number must be set to 10183. Correct IP address and port number on the remote computer must also be provided.

  • Page 135: Operation

    Operator manual Operation The Operation dialogue box is accessed from the File menu. This is the main dialogue box for operational control. You can select operational mode and ping rate, and you can initiate recording of the echo sounder information. The sounder has two functions to greatly reduce the need for echogram printout paper: Store/Replay and History.
  • Page 136 Extern Trig entry is checked. Click this option to enable the EA 400 to work in Slave mode. The echo sounder will then await the external trigger from the peripheral system, and the transmissions from the systems will be synchronized.
  • Page 137 400 transmits at maximum speed only limited by the speed of sound in water and/or processing delays. Selecting Single Step allows the EA 400 to conduct just one ping cycle every time the Step! entry on the Main menu is clicked, or the keyboard comination Alt+E is pressed.

  • Page 138: Printer And History

    EA 400 Printer and History The Printer and History dialogue box allows you to control the output to the system’s colour printer. The dialogue is accessed by the Print command on the File menu. Print Check this box if you want the echogram printing to be active.
  • Page 139 Operator manual Navigation - Check this box if you want position strings to be printed. Navigation receivers typically output a new position fix every second, and it is not practical to print them all on top of the echogram. The count parameter in the spin box reduces the rate of printing of the position strings.

  • Page 140: Print Setup

    The EA 400 echo sounder uses the print mechanism of the Microsoftt operating system when sending the echogram to a printer. Virtually any modern printer can be used. This Print Setup dialogue box controls the printing process.
  • Page 141 Operator manual Properties - This button activates the Properties dialogue box. This is a printer specific dialogue for entering special purpose printer parameters. You do not need to enter this dialogue box during normal operation of the echo sounder. The Properties dialogue box is part of the operating system.

  • Page 142: Raw Data

    EA 400 Raw Data The Raw Data dialogue box is accessed from the Interfaces menu. Output enable - If this output is actived (as shown), the raw data is sent to the specified port and IP address. Remote computer These settings identify the remote computer.

  • Page 143: Remote Display

    Operator manual Remote Display The Remote Display dialogue box is opened from the Install menu. The dialogue box controls the data flow to an external depth display (not a colour VGA display!) Depth output The depth information from the echo sounder can be exported to a remote depth display.
  • Page 144 EA 400 RS232 This button activates the RS-232 Setup dialogue box. This box is used to define communication port, baud rate etc. Related topics → RS-232 Setup, page 140 857-160981 / I...

  • Page 145: Replay

    Operator manual Replay This Replay dialogue box is accessed from the Operation dialogue box by clicking on the Files button. The Operation dialogue is in turn opened on the File menu. The Store function records the unprocessed transducer signal on the internal harddisk or an other recordable media.
  • Page 146 Selected Files The currently selected files are displayed in this field. Loop Check this box if you want the EA 400 program to loop through the currently selected replay files without stopping. Save Data Check this box if you want to store processed output data. The Store dialogue box will appear on the screen.

  • Page 147: Replay Control

    Operator manual Replay control The Replay control dialogue box is accessed from the Options menu. This small dialogue allows you easier access to the replay function. The buttons work as follows: Left arrow - Continuous playback. Middle arrow - Stepped playback (ping by ping) Right bars - Pause.

  • Page 148: Reprocess Heave

    EA 400 Reprocess heave The Reprocess heave dialogue box appears automatically when Change installation has been selected in the Replay dialogue box, and then after you have exited the Operation dialogue. The values initially shown in the dialogue box are those saved with the original data file.
  • Page 149 Operator manual Apply to all files - If you have selected more than one file in the Replay dialogue box, the settings will be applied to all these files, and the playback will run continuously. If you do not check this box, the playback will stop for every new file, display this dialogue box, and ask for new values.

  • Page 150: Rs-232 Setup

    EA 400 RS-232 Setup The RS-232 Setup dialogue box is accessed from several other dialogue boxes. It specifies the RS-232 communication settings. Identical settings must be used at the opposite side of the RS-232 cable. Parameters Port - Which RS-232 port do you want to use? Baud Rate - Select communication rate.

  • Page 151: Sensor Setup

    Operator manual Sensor setup The Sensor setup dialogue box is accessed from the Heave sensor dialogue box. The Heave sensor dialogue is in turn accessed from the Install menu. The purpose of the Sensor setup dialogue box is to establish the relative position of the heave sensor with respect to the vessel’s reference point.

  • Page 152: Serial Interface

    EA 400 Serial Interface The Serial Interface dialogue box is opened from the Interfaces menu. This dialogue is used to control the datagrams and formats exported by the echo sounder on a serial line. Depth Output Maximum Data Output - Tick the box to enable maximum data output on the serial line.
  • Page 153 Sound Velocity - This setting allows import of sound speed data from an external sensor (computer). The accepted formats are AML-CALC, Kongsberg Simrad SSP and Simrad-A. Remote Control - This setting allows import of remote control of logging and pinging on the serial input. The network is automatically on, but the port must be entered as 10183.

  • Page 154: Sidescan Range

    EA 400 Sidescan Range The Sidescan Range dialogue box is opened by right-clicking on the echogram in the Echogram and Range view on the display (just below the Header view). This dialogue is used to set the sidescan range (in metres) for both port and starboard transducers.

  • Page 155: Status Window

    Operator manual Status window The Status window dialogue box is accessed from the pop-up menu available in the Header view. Left-click in the Header to view to open the short-cut menu, and select Status window. This dialogue provides a quick overview of the current parameter settings in the echo sounder.

  • Page 156: Store

    EA 400 Store The Store/Replay function records the unprocessed transceiver data on the internal harddisk. The recorded signal can later be injected into the echo sounder processing software as if it arrived directly from the transducer. 857-160981 / I...
  • Page 157 Operator manual The Store dialogue is accessed from the File menu. It controls the recording of the unprocessed signal on the harddisk. The Replay dialogue box (available from the Operation dialogue box) controls the playback. The Store dialogue opens automatically if enabling Save Data in the Replay dialogue box.
  • Page 158 EA 400 A new line number can also be initiated from an external button connected to the General Purpose Transceiver (GPT) if this has been implemented during system installation. Echogram Data Tick the appropriate boxes to save echogram data. The parameters provided are identical to those in the Echogram Parameters dialogue box.

  • Page 159: Store User Settings

    Operator manual Store user settings The Store user settings dialogue box is accessed from the Options menu. Use this dialogue to save your current settings. Fill in your name or initials in the Create user field, and press the New user button to create a new directory for the information.

  • Page 160: Surface Range

    EA 400 Surface Range The Surface Range dialogue box opens if you click the right mouse button in the range field in the Echogram and Range view while operating with a Surface Range echogram. The dialogue box will also open when selected in the Echogram Parameters, Network Interface or Store dialogue boxes.

  • Page 161: Sound Velocity Profile (Svp) Editor

    Operator manual Sound Velocity Profile (SVP) Editor The SVP Editor dialogue box is accessed from the Environment dialogue box. The SVP Editor is regarded as a separate program, and it is described in a dedicated chapter. Related topics → SVP Editor description, 159 →...

  • Page 162: Temperature Sensor

    EA 400 Temperature Sensor The Temperature Sensor dialogue box is accessed from the Install menu. Water temperature is shown on the echo sounder display provided a thermistor (temperature sensitive resistor, 10 kohm at 25 deg C) is interfaced to the system.

  • Page 163: Transceiver Installation

    Operator manual Transceiver Installation This dialogue box controls installation and un-installation of transceivers. The dialogue box is accessed from the Install menu. Prior to this, all echo sounder activity must be stopped. When accessed, an opening dialogue allows you to either: •...
  • Page 164 EA 400 Frequency channels Hence, the echo sounder system consists of a number of frequency channels. Entries in the frequency channel list are shown in black, green colour. Detected channels that are not installed are shown in black. The phrase NONE replaces the transducer type name for uninstalled channels.

  • Page 165: Transceiver Settings

    Operator manual Transceiver Settings The Transceiver Settings dialogue box is accessed from the Header view on the display. Place the cursor on top of the mode and frequency information, and press the right mouse button. This dialogue box controls transceiver and transducer parameters specific to the current frequency channel.
  • Page 166 EA 400 Mode Active - The transmitter and receiver are active (normal operation). Passive - The transmitter is passive while the receiver is active. This mode of operation is useful for test purposes, and when you wish to measure the ambient background noise in the sea.
  • Page 167 Operator manual Transducer parameters - The x, y and z parameters are relative positions between the defined reference point and the transducer. Parameters to Zero (default) will ignore the input values from the attitude sensor. Advanced This button opens up the Advanced Transceiver dialogue box containing detailed numeric information about the transducer and the channel.

  • Page 168: Svp Editor

    EA 400 SVP EDITOR Introduction This chapter describes the SVP Editor (Sound Velocity Profile Editor). Related topics → Description, page 159 → Procedures, page 162 → References, page 166 857-160981 / I...

  • Page 169: Description

    SVP Editor Description Purpose The purpose of the Sound Velocity Profile Editor is to: • edit or inspect existing sound velocity profiles • create a new profile How to start the editor is explained in the operational procedures. The editor contains the following elements: (1) Toolbar (2) Profile view (3) Data view...

  • Page 170: Toolbar

    EA 400 Toolbar This area contains several buttons for editing a profile. From top, the buttons are: 1) Delete 2) Move 3) Add 4) Zoom 5) Pan 6) Zoom to contents 7) Undo 8) Extend profile 9) Sort The buttons are explained in the References chapter.

  • Page 171: File Formats

    SVP Editor File formats The editor operates on files, and accept the following file formats: • Simrad-A • AML-CALC • Kongsberg SSP10 Related topics → Procedures, page 162 → References, page 166 857-160981 / I...

  • Page 172: Procedures

    EA 400 Procedures Windows The Sound Velocity Profile Editor operates with a single window. This window is referred to as the main window in this document. In this window, you can view the sound velocity profile. Starting the editor The editor is started as follows: Select Install on the main menu bar.

  • Page 173: Save Profile

    SVP Editor Open an old file. Use the Save As button, and save it with a new profile name. Make the necessary changes. Use the Save button. Save profile You can save a profile in the following manner: If you have already named the profile: Click the Save button on the bottom of the editor.

  • Page 174: Zoom And Pan

    EA 400 Adjust the velocity or depth Select the Move button on the toolbar (second from top). Select the point you want to adjust, by using the left mouse button. Press the button and keep it pressed. Drag it to the depth and/or the velocity you want.

  • Page 175: References

    SVP Editor References Note Each function is active until another function is selected. Toolbar, left This area contains several buttons for editing a profile. Delete This button selects the delete function. Click once. Then click on each point to be deleted. As long as the Delete button is active, you can delete points by clicking on them.

  • Page 176: Toolbar, Bottom

    EA 400 Undo This button is used to undo the last action made. If you wish to undo more than the last action, press the button as many times as desired. Extend profile There is an already existing “profile” that is used to fill out the rest of your profile, down to 12000 meters.

  • Page 177: Ea2Neptune

    EA2NEPTUNE Introduction The EA2Neptune is a small software utility designed to reformat EA 400 *.out data files to the *.ea format used by the Neptune post-processing suite. To investigate the software version, rightclick in the blue title bar, and select About.

  • Page 178: Datagrams Description

    EA 400 The convertion takes place automatically once the Convert dialogue box is closed. The *.ea files are placed in the same directory as the input *.out files. Datagrams description The datagrams you can convert from are described in the Telegram and data formats chapter.

  • Page 179: Telegram And Data Formats

    181 → Echogram data file, page 182 Datagram formats These chapters provide information about the datagrams formats used to communicate echo sounder data to and from the EA 400 system. → NMEA datagram, page 183 →...

  • Page 180: Numeric Presentation

    EA 400 Numeric presentation In order to describe the file formats, common “C” structures are used to represent individual data blocks. The size of the various C types are: • char: 8 bit integer • short: 16 bit integer • long: 32 bit integer •...

  • Page 181: Data Encapsulation

    Telegram and data formats Data encapsulation A standard encapsulation scheme is used for all data files. Each datagram is preceded by a 4 byte length tag stating the datagram length in bytes. An identical length tag is appended at the end of the datagram.

  • Page 182: File And Directory Names

    The transect pre-fix states the current transect line number, and a new file is opened for every new line. The transect pre-fix is generated by the EA 400 sounder. Please note that other Kongsberg Maritime sounders might use a different transect pre-fix.
  • Page 183 Telegram and data formats Out data file The *.out files contain less amount of data. Fragmentation is supported, but is normally not required. Typically, this file contains navigation data and bottom detections that may be used by post-processing software. xyz data file The *.xyz files contain position (Lat/Lon) and depth information in ASCII format.

  • Page 184: Raw Data Format

    The described file format is a temporary format, valid for data files recorded with the software version 1.4. This file format is expected to change in future EA 400 versions and Kongsberg Maritime assumes no responsibilty for support on this format.
  • Page 185 Telegram and data formats struct ConfigurationHeader { char SurveyName[128]; // ”Loch Ness” char TransectName[128]; // ”L0123” char SounderName[128]; ”EA 400” float Motion x [m]; float Motion y [m]; float Motion z [m]; char Spare[116]; // future use long TransducerCount; // 1,2,3,4 struct ConfigurationTransducer { char ChannelId[128];...
  • Page 186 EA 400 An example NMEA speed message line is shown below: $HUVTG,245.0,T,245.0,M,4.0,N,2.2,K<cr><lf> Annotation datagram The annotation datagram contains comment text that has been entered by the operator (”dangerous wreck”). struct TextDatagram{ DatagramHeader DgHeader; // “TAG0” char Text[]; // ”Dangerous wreck”...
  • Page 187 Telegram and data formats Short Angle - The fore-and-aft (alongship) and athwartship electrical angles are output as one 16-bit word. The alongship angle is the most significant byte while the athwartship angle is the least significant byte. Angle data is expressed in 2’s complement format, and the resolution is given in steps of 180/128 electrical degrees per unit.

  • Page 188: Out Data File

    EA 400 Out data file Overview The *.out file may contain one or more of the following datagram types: CON0 - • Echo sounder configuration datagram NME0 - • Navigation input text datagram TAG0 - • Text annotation DEP0 - •...
  • Page 189 Telegram and data formats float PosX; // future use float PosY; // future use float PosZ; // future use float DirX; // future use float DirY; // future use float DirZ; // future use float PulseLengthTable[5]; // Available pulse lengths for the channel [s] char Spare2[8];...
  • Page 190 EA 400 Detected bottom depth The depth datagram contains depth that has been detected by the echo sounder. struct BottomDepthDatagram{ DatagramHeader DgHeader // ”DEP0” long TransducerCount, // 1, 2, 3 ... struct { float Depth; // [m] float Parameter1; // See Note 1 below float Parameter2;...

  • Page 191: Xyz Data File

    Note 1: When storing only one channel, the frequency will be written at the end of the file name. Example for 38 kHz system: L0000-D20050408-T11303400-EA 400-38.xyz If storing two or more channels, the data will be stored in a single file. Example: L0000-D20050408-T11303400-EA 400-38-120.xyz...

  • Page 192: Echogram Data File

    EA 400 Echogram data file Refer to page 192 for the format description. Note 1: When storing only one channel, the frequency will be written at the end of the file name. Example for 38 kHz system: L0000-D20050408-T11303400-EA 400-38.dg If storing two or more channels, the data will be stored in a single file.

  • Page 193: Nmea Datagrams

    Telegram and data formats NMEA datagrams Overview The following input datagram complies to the NMEA0183 protocol. The GLL and GGA datagrams are used for navigational data input. The port and the baudrate is chosen in the RS-232 Setup dialogue box. GLL - Geographic position - latitude/longitude Datagram format: $--GLL,llll.ll,a,yyyyy.yy,a,hhmmss.ss,A,a*hh<CR><LF>...
  • Page 194 EA 400 GGA - Global positioning system fix data Datagram format: $--GGA,hhmmss.ss,llll.ll,a,yyyyy.yy,a,x,zz,p.p,g.g,M, q.q,M,e.e,xxxx*hh<CR><LF> where (from left towards right): Component Contents hhmmss.ss UTC of position llll.ll,a latitude, N/S yyyyy.yy,a longitude, E/W GPS quality indicator Number of satellites in use, 00--12, may be different from the number in view Horizontal dilution of precisison g.g,M...
  • Page 195 Telegram and data formats ZDA - Time and date Datagram format: $--ZDA,hhmmss.ss,dd,mm,yyyy,zz,mm*hh<CR><LF> where (from left towards right): Component Contents hhmmss.ss UTC of position Day, 01 to 31 (part of UTC) Month, 01 to 12 (part of UTC) yyyy Year (part of UTC) Local zone hours, 00 to +/-- 13 hours Local zone minutes, 00 to +59 HDT - Heading...

  • Page 196: Annotation Datagram

    EA 400 Annotation datagram Both datagrams are available on the serial port, and on the Ethernet interface provided that the local computer’s input port is set to 10183, and that the correct IP address is used. Annotation datagram 1 External annotations may be input via the Navigation serial port as an NMEA datagram.

  • Page 197: Remote Control Datagram

    Telegram and data formats Remote Control datagram The echo sounder can be remotely controlled by input through the network or on a serial line. The following functions can be controlled: • Start/stop logging An example is shown below: PE,10504000,SYSTEM,STARTLOGGING CRLF PE,10504000,SYSTEM,STOPLOGGING CRLF •...

  • Page 198: Output Datagrams

    EA 400 Output datagrams Overview The EA 400 echo sounder can provide the following output datagrams: DBT - Depth below transducer • DPT - Depth • DBS - Depth below surface • Simrad - Ping based ASCII datagram • Simrad - Ping based binary datagram •...
  • Page 199 Telegram and data formats DPT - Depth This datagram exports the water depth relative to the transducer and offset of the measuring transducer. Positive offset numbers provide the distance from the transducer to the waterline. Negative offset numbers provide the distance from the transducer to the part of the keel in interest.
  • Page 200 Bottom surface backscattering strength (dB) Transducer number (never used!) Athwarthship bottom slope (in degrees) (Not used in EA 400) Simrad - Ping based binary datagram Serial line output is ASCII while network output is binary. The binary format is the same as for EA 500. The datagram has a fixed length.
  • Page 201 Telegram and data formats Atlas - Output datagram This is a fixed length datagram exporting the water depth from two channels. The datagram has a fixed length of 14 characters. If two identical frequencies are used simultanously, the first frequency (identfied as xx kHz - 1) is submitted with header DB, while the other (xx kHz - 2) is submitted with header DA.

  • Page 202: Echogram Datagram

    EA 400 Echogram datagram The echogram datagram format is identical for both output to the network and for file storage. Due to protocol limitations the number of output samples is limited to 700, while for file output the limit is 10000 samples.

  • Page 203: Status Datagram

    Telegram and data formats Status datagram A copy of the messages shown on the Status bar: ST,HHMMSShh, Text string<CR><LF> where (from left towards right): Component Contents header with 2 characters 1 character separator HHMMSShh current time on computer 1 character separator Text string Free text string <CR><LF>...

  • Page 204: Georef Output Datagram

    EA 400 Georef Output datagram Datagram format: SSG,HHMMSShh,xxxx.xxxxxxx,yyyy.yyyyyyy where (from left towards right): Component Contents header with 3 characters separator HHMMSShh 8 bytes -- time when ping is transmitted 1 character separator xxxx.xxxxxxx Latitude 1 character separator yyyy.yyyyyyy Longitude Example: SSG,10564020,5900.0177947,01000.0862086...

  • Page 205: Navigation Output Datagram

    Telegram and data formats Navigation Output datagram Datagram format: GL,HHMMSShh, Navigation string<CR><LF> where (from left towards right): Component Contents header with 2 characters 1 character separator HHMMSShh current time on computer 1 character separator Navigation Text string as set up in the navigation menu string <CR><LF>...

  • Page 206: Motion Sensor Datagram

    EA 400 Motion Sensor datagram Network datagram Network datagram is binary. MS,HHMMSShh,Heave,Roll,Pitch where (from left towards right): Component Contents header with 2 characters 1 character separator HHMMSShh 8 bytes -- time when ping is transmitted 1 character separator Heave 4 bytes floating point number...

  • Page 207: Sound Speed Datagrams

    Telegram and data formats Sound Speed datagrams AML-CALC input The AML CALC format is defined by Applied Microsystems Ltd (AML) for use with their sensors. The format is ASCII, and the datagram contains a five line header with a variable number of data lines.
  • Page 208 EA 400 Kongsberg SSP10 The new format is completely in ASCII and allows 9998 entries without limitations in resolution. In addition to depth and sound speed, it allows input of absorption coefficient, pressure, temperature and salinity or conductivity. The latter parameters may be used to calculate depth, sound speed and absorption coefficient.
  • Page 209 Telegram and data formats Component Contents llll.ll Latitude in degrees and minutes, plus optional deci- mal minutes. See note 5. Latitude N/S, valid characters “N” or “S”. See note zzzzz.zz Longitude in degrees and minutes, plus optional decimal minutes. See note 5. Longitude E/W, valid characters “E”...
  • Page 210 EA 400 Identifier Input data Data to be used P , T, C, α D(P ,T,C,L), c(P ,T,C,L), α P , T, C D(P ,T,C,L), c(P ,T,C,L) , α(P ,T,C,L) Note 2 - S00 is a special case because then the sound speed profile will be taken into use immediately without further operator intervention.

  • Page 211: Sound Speed Output

    Telegram and data formats Optional sound speed sensors The following sensors can also be read by the EA 400: • AML SVPlus • Sonar 2090 Refer to the manufacturer’s documentation for the sensor’s format description. Sound speed output The following data format is used.

  • Page 212: Attitude

    EA 400 Attitude Overview The EA 400 echo sounder will accept attitude datagrams from external sensors on the following formats: Sounder • Binary, EM 1000 and EM 950 compatible • Binary, EM 3000 and HiPAP compatible • Sounder The Sounder protocol may be the most common interface for heave, roll and pitch compensation.
  • Page 213 Telegram and data formats The definition of the attitude angles in this format is different from the Euler angles definition used elsewhere. The difference appears in the roll angle, where: The various status characters have the following meaning: U = Unaided mode and stable data. (The sensor operates without external input data.) u = Unaided mode but unstable data.
  • Page 214 EA 400 Binary EM 1000 / EM 950 compatible This format consists of a fixed length message using single byte unsigned, 2-byte unsigned and 2-byte two-complement integer data elements. For the 2-byte elements, the least significant byte is transmitted first.
  • Page 215 Telegram and data formats • Roll is positive with port side up. • Pitch is positive with bow up. • Heave is positive up. The status byte may have the following values: 90 Hex = Normal 91 Hex = Reduced performance A0 Hex = Invalid data Invalid data are indicated by values outside the specified ranges.

  • Page 216: Temperature Sensor - Output

    EA 400 Temperature sensor - output The datagram format is: $--MTW,x.x,C*hh<CR><LF> where (from left towards right): Component Contents Header temperature in Degrees Celcius C*hh Checksum <CR><LF> Carriage return and Line feed terminates the data- gram. 857-160981 / I...
  • Page 218 E 2005 Kongsberg Maritime ISBN 82-8066-023-2...

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