Kongsberg Simrad EM 300 Operation Manual
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Kongsberg Simrad EM 300 Operation Manual

Kongsberg Simrad EM 300 Operation Manual

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EM 300
Multibeam echo sounder
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  • Page 1 Operator manual EM 300 Multibeam echo sounder Base version...
  • Page 3 Kongsberg Simrad EM 300 Multibeam echo sounder Operation manual - Base version 160719 / AA020 / 2- -48...
  • Page 4 Kongsberg Simrad AS. KONGSBERG SIMRAD AS Strandpromenaden 50, P.O.Box 111, N-3191 Horten, Norway...
  • Page 5 Operation manual Sections This book is the Operation manual manual for the Kongsberg Simrad EM 300 multibeam echo sounder. It describes how to use the various applications installed on the EM 300 workstation. System description page 1 Operational procedures page 6...
  • Page 6 • EM 300 Software Release Note The reader This operator manual is intended to be used by the system operator. He/she should be experienced in the operation of positioning systems, or should have attended a Kongsberg Simrad training course. 160719 / /F...

  • Page 7: Table Of Contents

    Operation manual Table of Contents SYSTEM DESCRIPTION ........Introduction .
  • Page 8 Kongsberg Simrad EM 300 / Base version To monitor the progress ........
  • Page 9 Operation manual Seabed Viewer ......... . . SSP Editor .
  • Page 10 Kongsberg Simrad EM 300 / Base version Seabed Imaging ......... .
  • Page 11 Operation manual Operational Procedures ........SV Plus Probe Input .
  • Page 12 Kongsberg Simrad EM 300 / Base version Keep function ......... . .
  • Page 13 Operation manual Introduction ..........File .
  • Page 14 Kongsberg Simrad EM 300 / Base version Pitch Calibration .........
  • Page 15 Operation manual Print ........... Lines .
  • Page 16 Kongsberg Simrad EM 300 / Base version Playback Mode ......... .
  • Page 17 Operation manual Motion errors ..........Sound speed errors .
  • Page 18 Kongsberg Simrad EM 300 Base version Document revisions Date Written by Checked by Approved by 22.01.98 18.09.98 18.11.98 13.04.00 11.12.00 07.03.02 (The original signatures are recorded in the company’s logistic database) To assist us in making improvements to the product and to this manual, we would welcome comments and constructive criticism.

  • Page 19: Document History

    Operation manual References (The information on this page is intended for internal use) Documents Sect Title Loc. File P.no/Rev Complete manual AA000 160719 Document history Rev.A Original issue. Rev.B Major update. Manual changed from a modular book to contain a sing- le document.
  • Page 20 Kongsberg Simrad EM 300 / Base version Blank page 160719 / /F...

  • Page 21: System Description

    The design of the EM 300 is based on more than 50 years of hydrographic experience with echo sounders, sonars and underwater positioning for civilian and military use. Kongsberg Simrad is today a part of the Kongsberg Group, a world wide organisation supplying advanced instrumentation for civilian, research and military maritime communities.
  • Page 22 Post-processing Postprocessing software is available from both Kongsberg Simrad and third-party suppliers. A world-wide marketing and service organization having many years of multibeam experience is in place for supporting the EM 300.
  • Page 23 System description Interfaces: Sound Speed Sensor Operator Station Tide Center depth output Ethernet and serial lines (data i/o) A0 plotter Colour printer Optional equipment Internal Optional Ethernet Ethernet Sub Bottom Transceiver Interfaces: Profiler Unit Positioning systems Transceiver Unit Attitude (roll, pitch and heave) (Option) Heading Clock...

  • Page 24: Characteristics

    Kongsberg Simrad EM 300 Base version Characteristics Main units The Kongsberg Simrad EM 300 multibeam echo sounder consists of the following units: • Transmit transducer array • Receive transducer array • Transceiver Unit • Operator Station A complete mapping system will also include the following additional units: •...

  • Page 25: Transceiver Unit

    System description Transceiver Unit The EM 300 Transceiver Unit contains the transmit and receive electronics and processors for beamforming, bottom detection, and control of all parameters with respect to gain, ping rate and transmit angles. It has serial interfaces for all time-critical external sensors such as vessel attitude (roll, pitch, heading and heave), vessel position, and external clock.

  • Page 26: Operational Procedures

    2 OPERATIONAL PROCEDURES Introduction This chapter presents the most important operational procedures required to operate the Kongsberg Simrad EM 300 multibeam echo sounder. The EM 300 is operated in on-line or off-line mode. • The on-line mode is used during the survey. The applications...

  • Page 27: Operational Summary

    Operational procedures Operational summary To start the EM 300 system, follow this procedure: Power up the system. Refer to page 8. → Log in. Refer to page 8. → Start the EM 300 application. Refer to page 9. → Check the installation parameters. Refer to page 10 for clock adjustment and/or synchronization.

  • Page 28: Starting The Em 300

    Kongsberg Simrad EM 300 / Base version Starting the EM 300 Power on To switch power on, follow this procedure: Switch on the power on the EM 300 Processing Unit. - It has an on/off switch on the front panel.

  • Page 29: Launchpad Introduction

    Operational procedures - You are now ready to start the EM 300 software. Place the cursor in the background part of the display image. Press the middle mouse button. - A small menu is displayed on the screen. This menu allows you to start the on-line applications (EM 300) and/or the off-line applications, such as Merlin or Neptune.

  • Page 30: Calibration

    Kongsberg Simrad EM 300 / Base version • Physical location of the transducer arrays and the sensors • Serial lines set-up • Offset definitions If any of these settings have changed, the system parameters must be adjusted accordingly before the survey starts.

  • Page 31: To Check The Water Level Setting

    Operational procedures Press 1 pps Sync to switch on the 1 pulse per second external clock synchronization. The Clock field on the Installation Menu and the parameters used are → described in detail on page 135. To check the water level setting In order to measure the exact depth, the system must know how deep the transducer array is installed: the distance between the vessel’s water level in normal trim and the surface of the transducer...

  • Page 32: Maximum And Minimum Depth

    Kongsberg Simrad EM 300 / Base version To activate the chosen sound speed profile, perform the following procedure: Locate the Runtime Menu dialogue box on the desktop. - The default location for this dialogue box is in workspace 4. The dialogue box was automatically opened when the EM 300 was switched on.

  • Page 33: Check The Primary Settings

    Operational procedures Check the primary settings The system runtime settings will in most cases be the same as for the previous survey, and the definitions are then stored. However, to ensure that everything is set up correctly, we advice you to check that all the settings in the Runtime Menu dialogue box are in accordance with what you want.

  • Page 34: Check The External Sensors

    Kongsberg Simrad EM 300 / Base version Check the external sensors Proper operation of the external sensors are vital for the EM 300 operation. Check that the system’s external sensors are switched on. Press the Sensors... button on the EM 300 Launchpad to access the Status Display for the sensors.
  • Page 35 Operational procedures To define the survey name, click on the small triangle on the right side of the name field. A list of the existing survey names appear. Select the survey you wish to work with, or click <New survey> if you wish to establish a new job.

  • Page 36: To Prepare Logging

    Kongsberg Simrad EM 300 / Base version • Operator name The Line Setup dialogue box is described in Figure on page 74. → To enter the operator name, click on the small triangle on the right side of the Operator field. A list of existing operator names appears, and you can choose your own if it is already there.

  • Page 37: To Prepare Logging Of Optional Data

    Operational procedures - Note that the Survey format to disk option should always be enabled. This is necessary to ensure safe logging and to provide data for the geographical displays. You should only disable it if you are using other display software for online quality control than the geographical displays provided with the EM 300.

  • Page 38: To Start And Stop Logging

    Kongsberg Simrad EM 300 / Base version Locate the Survey Display dialogue box on the desktop. - The default location for this dialogue box is in workspace 1 (Main). The dialogue box was automatically opened when the EM 300 was switched on.

  • Page 39: To Monitor The Progress

    • Sensor data values • Available disk space Visual quality assurance with the Survey Display The Kongsberg Simrad EM 300 echo sounder system includes the Survey Display application for visual quality control of the survey. The basic operational procedures for the Survey Display is presented on →...
  • Page 40 Kongsberg Simrad EM 300 / Base version • 1. Select File Admin... from the File menu in the Launchpad main window. • 2. This brings up the File Admin window. Instructions and messages are issued in the area close to the bottom of the window.
  • Page 41 Operational procedures • 6. Verify the type of operation and type of data. To delete the listed files, select the OK button. The confirmation window disappears and the files are deleted. The deleted files are removed from the list of available files in the File Admin window.

  • Page 42: Closing Down The Em 300

    Kongsberg Simrad EM 300 / Base version Closing down the EM 300 Software Method 1 Exit the EM 300 by selecting the Exit alternative on the File menu. You will then see a dialogue box in which you can choose how to close down the system.

  • Page 43: Hardware Units

    Operational procedures HP- use the power button to close down the system. This equals Exit Launchpad & Logout described above, but in addition the power is turned off. Method 3 This method may still be used if you have older machines: Exit all the EM 300 software applications by selecting File ->...

  • Page 44: Initial Setup

    Select Edit on the pull-down menu in the Installation Menu window, and the Edit enable. Enter the current password. - The password defined by Kongsberg Simrad on delivery is em300. Note that the password entry is case sensitive. 160719 / /F...

  • Page 45: To Change The Password

    Operational procedures Click OK. Password Entry: Password: Modify Cancel Figure 6 The Password window Once the password is entered, you are free to modify the installation parameters. Caution The installation parameters should normally not be tampered with. Unauthorized and erroneous modifications may degrade the accuracy of the survey results.

  • Page 46: To Define The Position Delay

    Kongsberg Simrad EM 300 / Base version Access to the Installation Menu is described on page 24. → The Parameter fields are described in detail on page 137. → For each of the positioning systems, enter the measured values for forward, starboard and downward position relative to the coordinate system (as required).

  • Page 47: To Define The Motion Sensor Delay

    Operational procedures To define the motion sensor delay As with the position sensor, the information from the motion sensor is important for the system accuracy. The timing must thus be correct, and to define the “age” of the motion information, you can enter a sensor delay.

  • Page 48: To Set The Clock

    Kongsberg Simrad EM 300 / Base version Press the I/O Interfaces icon on the EM 300 Launchpad. - The I/O Interfaces dialogue box appears. Further information about the parameters may be found on page 149. → To set the clock The EM 300 system requires accurate timing, and all data from the survey is time tagged.

  • Page 49: Unix, Motif And Cde Information

    This chapter is intended for those not familiar with the UNIX operational environment. The Operator Station used for the Kongsberg Simrad EM 300 is a UNIX Workstation. It uses basic commercial software tools following industrial standards. These include a Motif...

  • Page 50: Mouse And Window Operations

    The following is a description of the Motif window system, and how you can interact with it. The items discussed here are of a general nature, and apply to all of the Kongsberg Simrad EM 300 applications. Details can be found in the following publications: •...
  • Page 51 Operational procedures Window menu button Menu bar Title bar Minimize and Maximize buttons Title bar ptions indow (CD3388) Scroll bar and Slider Client area Figure 7 A Motif Window (example) Title bar - The horizontal bar along and below the upper window frame containing a text;...
  • Page 52 Kongsberg Simrad EM 300 / Base version Active window - At any time, the window on the screen which contains the mouse pointer, is defined as the active window. It is recognised by having a highlighted frame and title bar. Any keyboard input is assigned to this window.
  • Page 53 Operational procedures Unoccupy workspace - Use this option to delete the window from the current workspace. Close - Use this option to close the window. Note that some applications may have disabled this function. Window manipulation The windows can be manipulated in several different ways to suit your needs and personal preferences.
  • Page 54 Kongsberg Simrad EM 300 / Base version Switch area pop-up menus The Switch area is the background screen where the background pattern is not covered by any window. Clicking a mouse button while the mouse pointer is in this area, activates any of three pop-up menus, depending on which mouse button you click.
  • Page 55 • Text fields • Lists • File selection boxes. The following types are used by the Kongsberg Simrad EM 300 software. Option button This is a special type of push button containing a small rectangle on the right hand side. When pressed, a limited set of options will be displayed.
  • Page 56 Kongsberg Simrad EM 300 / Base version File selection box Whenever a file is selected for reading or writing, a file selection box will be displayed. “Tear-off” menus The Tear-off menus are indicated by their perforation look-alike line at the top of the pull-down menu.

  • Page 57: Common Desktop Environment (Cde)

    Operational procedures Common Desktop Environment (CDE) Front panel The Common Desktop Environment (CDE) supplies you with tools and commands to organize and navigate among the active programs. The central facility in this environment is the Front panel (of which a part is shown below) which is usually situated along the lower edge of the screen.
  • Page 58 Kongsberg Simrad EM 300 Base version When operating the EM 300 system, you can also choose between the workspaces on the Launchpad. 160719 /F...

  • Page 59: Common Kongsberg Simrad Functions

    Operational procedures 2.11 Common Kongsberg Simrad functions Introduction The following paragraphs describe a number of common functions and dialogue boxes used throughout the Kongsberg Simrad EM 300 applications. The following subjects are covered: • Geographical areas Please refer to page 40 →...

  • Page 60: Geographical Areas

    Kongsberg Simrad EM 300 / Base version Geographical areas A “geographical area” is a window where the client area represents a geographical area. This area is used to display maps, survey lines, and so on. Throughout the EM 300 documentation these windows are also referred to as “survey area”...

  • Page 61: File

    Operational procedures File Overview This window appears whenever it is required to open a new file or save an existing file. It provides a list of all the available files in the current directory, and allows you to move up and down the directory structure.
  • Page 62 Kongsberg Simrad EM 300 / Base version The following wildcard characters are accepted: * (representing any sequence of characters) ? (representing any single character). The files conforming to the filter are shown in the list box to the right. The filter is activated by pressing Enter on the keyboard or by clicking on the Filter button at the bottom of the dialogue box.

  • Page 63: Plot

    Operational procedures Plot Overview This dialogue box is opened from the Plot command on the File menu. The function brings up two dialogue boxes, one after the other. • In the first dialogue box you select the area to print, the scale and the geographical projection.
  • Page 64 Kongsberg Simrad EM 300 / Base version Figure 10 The first Print dialogue box Enter the longitude and latitude on the following formats: E103 40 55.6 N1 13 35.618 Reference The Reference settings are also used for parameters required by specific printouts.
  • Page 65 Operational procedures • Postscript level 2: For colour PostScript plots • Raster: For raster plotters • HPGL: For plotters accepting the Hewlett PackardE (HP) interface language. Raster images can also be generated on a ppm format. If you want to convert to another format, you must pipe the output into a filter that can do the proper conversion.
  • Page 66 Kongsberg Simrad EM 300 / Base version Selecting File will result in a print file containing the printer commands. The file name must be defined in the text input field below the radio buttons. You must then take manual action for further operations on the file.
  • Page 67 Operational procedures Acceptance Press the OK button to close the dialogue box and start the print actions defined. Press Cancel to close the dialogue box without printing, or Help for online guidance. 160719 / /F...

  • Page 68: Tool Bar

    Kongsberg Simrad EM 300 / Base version Tool bar The buttons on the tool bar are general tools for scaling, mouse operations and panning. These tools are available in several of the Kongsberg Simrad EM 300 software applications using geographical presentations.
  • Page 69 Operational procedures • When the +1 button is selected, the scaling factor will be moved up and down a list of normal scaling factors; from 1:10 up to 1:750.000 and 1:10.000.000. • When the *2 button is selected, the scaling factor will be the double or half of the previous scaling factor.

  • Page 70: View Procedures

    Kongsberg Simrad EM 300 / Base version View procedures To change annotation colours You can change all the display colours used in the main window. This includes background, grid lines, survey lines etc. Select View on the main menu bar.
  • Page 71 Operational procedures - The Lat/Long dialogue box appears. It contains a list of the alternatives. Click on the button to the left of the alternative you wish to use. Click OK to apply and exit. The Lat/long dialogue box is described on page 210. →...

  • Page 72: Special Mouse Operations

    Kongsberg Simrad EM 300 Base version Special mouse operations Overview The mouse plays an active role when you use the geographical windows. In addition to the usual left mouse button functions for pressing buttons and menu selections, the middle and the right mouse buttons are often used.
  • Page 73 Operational procedures Drag select For some of the geographical windows a part of a segment can be selected by using the drag select method: Press the Ctrl key and hold it down. Position the mouse pointer at the segment in the geographical area.
  • Page 74 Kongsberg Simrad EM 300 Base version - The value will be displayed until the next time the geographical window is redrawn. Information text field below the geographical area The right text field below the geographical area can display information about a segment in the geographical area. Typical information displayed here includes coordinates, line name, region name, etc.

  • Page 75: The Survey Display And The Graphical Utilities

    Operational procedures 2.12 The Survey Display and the graphical utilities Introduction The Survey Display is mainly used for visual quality control of the survey, but it is also used as “host” for the other graphical utilities incorporated in the EM 300 system. The Survey Display is automatically started when the EM 300 is powered up for on-line operations.

  • Page 76: Ping Display

    Kongsberg Simrad EM 300 Base version Press and hold the middle mouse button, and move the mouse sideways. The view in the window is shifted accordingly. To redraw This function was implemented to make the graphical software run on slower workstations, and allows you to redraw the display if the display interval has been reduced.

  • Page 77: Bridge And Helmsman Display

    Operational procedures The Grid Display is described on page 236. → You can start it as described here. Before the Grid Display is started, the display area and the cell size to be used must be defined. Select Processing -> Create grid... on the Survey Display main menu.

  • Page 78: The Planning Module

    Kongsberg Simrad EM 300 Base version The Planning module The Planning module is an integrated part of the Survey Display utility. It allows a fully comprehensive survey plan to be made aforehand, and it also presents a survey plan available during the survey as an integrated part of the multibeam echo sounder operation.
  • Page 79 Operational procedures Click on the icon on the EM 300 launchpad. Identify the profile you wish to work on. The SSP Editor is also started automatically whenever a new profile is downloaded. Further operational procedures are found on page 337. →...

  • Page 80: System Self Test

    Kongsberg Simrad EM 300 Base version 2.13 System self test Overview The EM 300 supports off-line and on-line self test; BIST (Built-In Self Test). • On-line BIST is operational all the time, it monitors the operation, and will detect failures and abnormalities during logging.
  • Page 81 Operational procedures Ok Indiacator is green Fail Indicator is red The test result messages are displayed in the text field at the bottom of the dialogue box, and can be printed and/or saved as described above. More about the BIST files can be found in the System Administration chapter in the EM 300 Maitenance Manual.

  • Page 82: Em 300 Launchpad & Status Display

    Kongsberg Simrad EM 300 / Base version 3 EM 300 LAUNCHPAD & STATUS DISPLAY Introduction The purpose of this chapter is to provide detailed information about the commands and parameter settings in the EM 300 echo sounder operation dialogue boxes. It thus presents all the windows, icons and boxes associated with the operation of the EM 300 multibeam echo sounder software.

  • Page 83: The Launchpad

    Launchpad and Status Display The launchpad Introduction All workspaces on the EM 300 Operator Station contains: • Launchpad window Unless the EM applications are started automatically from the Survey Display, you can start them here. Use these four buttons to choose the active workspace.

  • Page 84: Operator Station

    Kongsberg Simrad EM 300 / Base version Operator Station This group provides you with the status of your remaining disk space, and the current load in percent. The information is dynamic, and continuously updated. If you click on the Operator Station...

  • Page 85: Echo Sounder

    Launchpad and Status Display Echo sounder This group provides you with the status of a selection of the current system parameters. The selection is defined by the choices you make in the Sounder Status Configuration... dialogue box accessed from the Layout & Config menu. Refer to page 90 for a description of the Sounder Status →...
  • Page 86 Kongsberg Simrad EM 300 Base version Refer to page 100 for further information about the Status Display. → 160719...

  • Page 87: Sensors

    Launchpad and Status Display Sensors... This group provides you with the status of your current sensor parameters. The information is dynamic, and continuously updated. The selection is defined by the choices you make in the Sensor Status Configuration dialogue box accessed from the Layout &...

  • Page 88: Sounder & Logging

    Kongsberg Simrad EM 300 Base version Sounder & Logging This group provides you with four buttons to control the main EM 300 echo sounder functions. The group may appear in two variations, one with Start in the top left button, and one with Simulator in the top left button. The...

  • Page 89: Workspace

    Launchpad and Status Display Workspace This group allows you to select which of the four workspaces you need displayed. These buttons perform the exact same functions as the four buttons in the Common Desktop Environment (CDE) window. Workspace Survey Chart MBES (Cd4362Gb) Figure 18 The Workspace options...

  • Page 90: Programs

    Kongsberg Simrad EM 300 Base version Programs The options in the Programs group allow you to start a number of individual programs. Bridge Echo Ping Display Sounder Display Survey Seabed Programs Display Viewer Sound Workstation Singlebeam Speed Data Profile (Serial &...
  • Page 91 Launchpad and Status Display • Grid Display Grid Display: page 236 → • Sound Speed Profile Editor Sound Speed Profile Editor: page 333 → • Setup for Echo Sounder Setup for Echo Sounder: page 108 → • Workstation I/O (Serial & Network) Workstation I/O: page 149 →...
  • Page 92 Kongsberg Simrad EM 300 Base version Restore layout - Select this option if you wish to restore the layout of the program window to the default. Terminate - Select this option to stop the program. Enable Auto restart - Select this option to enable the program to restart automatically if it accidentally terminates.

  • Page 93: Survey

    Launchpad and Status Display Survey The Survey field is shown below. Survey: Horten_Havn Line... (CD5630) Figure The Survey group This field allows you to select the current survey. The field also provides you with the current line number. Survey Click the small triangle (as indicated in the figure) to select a survey from the drop-down menu or to enter a new survey.
  • Page 94 Kongsberg Simrad EM 300 / Base version Refer to page 135 for further description of the clock settings. → Survey Predefined Setups - These settings are used as “templates” for the echo sounder operation. They contain setup information such as projections, environments and coastlines.
  • Page 95 Launchpad and Status Display Enter a string New operator: No Name Help Cancel (Cd4413) Figure String entry dialgoue box for operator identification Planned Line Id - The Planned Line ID has no relation to line number. This ID will typically refer to an identifier used in another context.

  • Page 96: File

    Kongsberg Simrad EM 300 Base version File Overview The File option on the launchpad’s main menu bar holds the following options: • File Admin • Print/View • Reset Logfile • Storage Locations • Exit The File Admin dialogue box allows you to delete, backup or restore survey and data files.
  • Page 97 Launchpad and Status Display File Admin The purpose of the File Admin dialogue box is to allow file backup, deletion and restoration. You can perform dedicated actions on all the files generated for or by the survey. More about the file types and their location is presented in the System Administration chapter in the EM 300 Maintentance manual.
  • Page 98 These files are the most important files collected during a survey. If you accidentally loose your survey data format files (required in the geographical displays in the Kongsberg Simrad postprocessing software), you can recreate these files based on the raw data files.
  • Page 99 Launchpad and Status Display Delete - This selection will delete the files chosen by you. When selecting files for delete, the file related information is shown below the list, as well as the total size of selected files. When you press the Apply button, a confirmation dialogue appears, and you are asked to verify the deletion.
  • Page 100 Kongsberg Simrad EM 300 / Base version Generate tape TOC - This option produces a tape Table Of Contents (TOC), and you may use this TOC for later retrieval of one or more files from this tape. When this command is selected, an input dialogue appears, and you may supply a name to be associated with the TOC.
  • Page 101 Launchpad and Status Display Tape Options Note You must define the option before you press the Apply button to start the tape operations. Files This field displays the current file names. To select a file, click on the file name. The applicable file information is then displayed under the File field.
  • Page 102 Kongsberg Simrad EM 300 / Base version Print / View Purpose This dialogue box is used to visualize the various settings made automatically by the EM 300 system and/or manually by you. Please refer to figure 24. → Print / View...
  • Page 103 Launchpad and Status Display The Logfile contains messages generated by the system applications, while the Setup files contain the runtime or installation parameters transmitted to the Transceiver Unit for use during the processing. The file presented is the one you selected using the Sources selector described above.
  • Page 104 Kongsberg Simrad EM 300 / Base version Survey - Select the survey file you wish to view. A list of files are available if you click on the small triangle in the file field. For more information about the survey files, refer to the System →...
  • Page 105 Launchpad and Status Display Reset logfile This option on the File menu allows you to clear the main survey data file. Before the file is cleared a warning message appear, and you may start the backup process. If you decide to do a backup, the file will be named after the following convention: YYYY_MMDD_HHMM_esoLogfile where:...
  • Page 106 Kongsberg Simrad EM 300 / Base version Storage Location Purpose The purpose of the Storage Location dialogue box is to allow you to control the location of the various files generated by the survey. An overview of the file types and their default location is presented in the →...
  • Page 107 Launchpad and Status Display Shared Data The text box is used to identify the preferred location of the Shared Data files. Enter the folder identification directly, or use the Location Selector to navigate. Press the Set Location button to apply. Exported Data The text box is used to identify the preferred location of the Exported Data files.
  • Page 108 Kongsberg Simrad EM 300 / Base version Exit This final choice on the File menu allows you to exit the EM 300 launchpad. You are presented with three choices. All will first check if the echo sounder is still running, and if a survey is in progress.

  • Page 109: Layout And Configuration

    Use this command to read the user’s personal default layout. To access the layout, it is important to apply the same operator name as when the layout was created. Read factory default layout Use this command to read the default layout created by Kongsberg Simrad AS. 160719 / /F...
  • Page 110 Kongsberg Simrad EM 300 / Base version Sounder Status Configuration To access the Sounder Status Configuration dialogue box, choose the Sounder Status Configuration choice on the Layout & Config menu on the Launchpad. Figure 27 The Sounder Status Configuration dialogue box Each box in the Launchpad’s Echo Sounder group displays...
  • Page 111 Launchpad and Status Display Sensor Status Configuration This command opens the Sensor Status Configuration dialogue box. Sensor Status Configuration Sensor Status Fields Each menu below corresponds to an item in the Sensor Status area in the Launchpad. Use ‘Layout & Config -> Save Sensor Status Config’...

  • Page 112: Options

    Kongsberg Simrad EM 300 / Base version Options Overview The Options menu contains the following choices: • User preferences • Logging • Datagram subscriptions The options in the User preferences dialogue box allows you to define certain alarms and default settings.
  • Page 113 Launchpad and Status Display User preferences Purpose This dialogue box allows you to make a number of default settings to your echo sounder. The modifications you do are implemented immediately. User Preferences Lat./Long. Display Format: 60.333 Sound Speed Max. Offset: Alarm disabled Auto Logging Interval: 30 min...
  • Page 114 Kongsberg Simrad EM 300 / Base version Refer to Datagram subscriptions on page 96. → Sensor Audible Alarm This option enables the audible alarm for missing sensor input. When the system does not log, these alarms are only issued to the...
  • Page 115 Launchpad and Status Display Logging The Logging dialogue box contains menus for selecting • Logging media • Optional Datagrams for logging All the options in this window are automatically saved to disk to be used as defaults at the next startup. Figure 30 The Logging dialogue box Logging media Raw data to disk - This option is always enabled, and it can not...
  • Page 116 Kongsberg Simrad EM 300 / Base version Datagram subscriptions Description This dialogue box is used to define which datagrams are sent to which subscribers. They can be sent to external Ethernet or to programs on the operator station. This is not used for data output on serial (lines) ports.
  • Page 117 Launchpad and Status Display Figure 31 The Datagram Subcriptions dialogue box Refer to page 93 for a description of the User preferences dialogue box. → If the periodic user has selected one or more of the periodic datagrams, the system automatically enables the periodic timer. If you de-select all the periodic datagrams, the periodic timer is deactivated.
  • Page 118 Kongsberg Simrad EM 300 / Base version The IP Addresses list is maintained with a set of commands available from the IP addresses Options menu directly below the list. These commands are: • Add IP address • Remove IP address •...
  • Page 119 Launchpad and Status Display • Add - Define a new IP address to be used by the system. • Remove - Delete an existing IP address • Modify - Change an exisiting IP address to another value. IP Port no. Select an IP address from the list.

  • Page 120: Status Display

    Kongsberg Simrad EM 300 / Base version Status Display Overview The EM 300 Status Display is brought up if you click on any of the following “name buttons” in the EM 300 Launchpad: • Echo sounder... • Operator Station... • Sensors...
  • Page 121 Launchpad and Status Display Echo sounder Auto-mode Actual Parameters Depth To Normal Incidence: 29754 Normal Incidence Backscatter: 51 Oblique Backscatter: 48 Yaw Stabilization Angle: 126 Fixed Gain: 0dB Coverage: 68/68 Sounder Mode: Deep Tx Power Att: 0dB TRU OK Sounder Active BSP OK Ping No: 76 Depth: 23.12m...

  • Page 122: Operator Station

    Kongsberg Simrad EM 300 / Base version Other status parameters Ping no - This is a sequential counter. The number increases with 1 for every new echo sounder transmission. It is set to 0 every time you switch on the Transceiver Unit, or automatically when it reaches 65535.
  • Page 123 • Survey Format to Disk: The datagrams are logged in Kongsberg Simrad Survey format onto the harddisk. Raw to Disk is always enabled. The Survey Format to Disk should normally be on, as the program’s geographical displays require these data to be functional.
  • Page 124 Kongsberg Simrad EM 300 / Base version System The following information is provided (the values are dynamic, and are updated continuously): • CPU load : The current load of the Operator Station’s CPU. The value is presented as a percentage of maximum load (100%) •...

  • Page 125: Sensors

    Launchpad and Status Display Sensors Introduction This part of the Status Display presents current information about the sensors. Figure 34 The EM 300 Sensors parameters Sensor data The following information is provided (the values are dynamic, and are updated continuously): Time - This is the current system time.
  • Page 126 Kongsberg Simrad EM 300 / Base version No. of Sat - The actual number of positioning satellites curently detected by the positioning system Pos (H)DOP - The current HDOP (Horizontal Dilution Of Precision) value from the positioning system. Pos. Quality - This is an indicator for the relative accuracy of the current position.

  • Page 127: Em 300 Operation Menus

    Operation menus 4 EM 300 OPERATION MENUS Introduction Purpose The purpose of this chapter is to provide detailed information about the commands and parameter settings in the EM 300 installation, test and runtime setup dialogue boxes. These are all accessed from the Runtime Menu window. The following topics are covered: •...

  • Page 128: Organization And Main Menu

    Kongsberg Simrad EM 300 / Base version Organization and main menu Purpose All setup for the EM 300 is accessed through the Runtime Menu dialogue box. The purpose of the Runtime Menu dialogue box is to allow you to modify the parameters used by the EM 300 multibeam echo sounder during operation as conditions change.

  • Page 129: Show

    Operation menus Save... Use this option to save all the current operating parameters on the system’s default user setup file. Note that the file will be updated permanently. No warnings are given before you replace the existing file with the new set of parameters. Save as...

  • Page 130: Runtime Menu

    Kongsberg Simrad EM 300 / Base version Runtime Menu Overview The Runtime Menu is available by default. Note The vaules for minimum and maximum depth are the recommended values. The dialogue box gives you access to the following parameter groups: •...
  • Page 131 Operation menus Figure 35 The Runtime menu dialogue box, with absorption coefficient value from EM300. • Deep • Very deep • Extra Deep 160719 / /F...
  • Page 132 Kongsberg Simrad EM 300 / Base version Figure 36 The EM 300 Sounder Main field During normal operating conditions, you are advised to set the ping mode to Auto. The system will then automatically use the most appropriate mode, and - if necessary - switch between the modes to obtain maximum coverage.
  • Page 133 Operation menus (CD4483) Wind Sway Waves Surge Current Sway Figure 37 The forces acting on the vessel during the survey • Off - No heading compensation takes place. The transmitter sector follows the current heading of the vessel. Unless the vessel’s heading is 100% straight you will experience “blind zones”...

  • Page 134: Sector Coverage

    Kongsberg Simrad EM 300 / Base version The heading filter controls how fast the filtered heading used during logging will follow the actual heading of the vessel. It is used when the system reads the current heading from the vessel’s sensor(s).
  • Page 135 Operation menus Equiangle - The beams are distributed with an equal angular spacing based on the angular coverage used. This gives many soundings close to the centre of the survey line, and few on the edge of the swath. In-between - Earlier the equiangle beam spacing was recommended for seabed imaginery.

  • Page 136: Sound Speed

    Kongsberg Simrad EM 300 / Base version Force Depth When the echo sounder is switched on and starts transmitting, or if it looses the bottom track, you may sometimes find that it has problems in finding or recovering the bottom. This happens typically at extreme depths, and especially if there is a lot of acoustic interference or if the water is very aerated.

  • Page 137: Sound Speed At Transducer

    Operation menus Figure 38 The Sound Speed field Sound speed profiles are organized as separate files. These may be edited with the Sound Speed Profile (SSP) Editor. New profiles may be created with the editor or imported into the system from another computer or sound speed probe.
  • Page 138 Kongsberg Simrad EM 300 / Base version The sound speed value from the sensor will automatically be used as first value in the sound speed profile for depth/raybending calculations and for beam steering. Note This can be disabled by the Use Transducer Dept. parameter in the Show->Test->...

  • Page 139: Filtering

    Operation menus Filter(s) If From Sensor is selected, the length of the filtering of the sensor data can be selected (1-60 seconds). This also sets the update rate. Filtering Overview There is always a small risk of false detections in a multibeam echo sounder.
  • Page 140 Kongsberg Simrad EM 300 / Base version It is always beneficial to eliminate erroneous measurements before postprocessing. In addition, if a false detection in a beam is eliminated in the first pass, a valid detection may be acquired in the second pass.
  • Page 141 Operation menus Figure 40 Slope filter principles This setting does not affect the depth measurements, only the backscatter strengths. Interference If the vessel is equipped with other echo sounders on sonars operating on frequencies close to the EM 300, you may experience interference.

  • Page 142: Absorption Coefficient

    Kongsberg Simrad EM 300 / Base version Absorption Coefficient The setting in this field is used to define a value for the average absorption coefficient through the water column at 31.5 kHz. For EM 300 the default absorption coefficient is 6.5 dB/km.
  • Page 143 Operation menus For seabed imaging, it is important to adjust this angle so that a minimum of angle-dependent amplitude variation is seen in the Seabed Image data display. This is to give best use of its dynamic range. The bottom backscatter strengths in the ping display are not affected by this setting.

  • Page 144: Installation Menu

    Kongsberg Simrad EM 300 / Base version Installation Menu Overview The Installation Menu is accessed from the Runtime Menu dialogue box by selecting Installation Parameters from the Show menu. The Runtime Menu is started automatically when the echo sounder is started, but you can also open it from the Launchpad.
  • Page 145 Operation menus • Save • Save as... • Close window Read Select Read to open the current set of previously defined parameters saved on the hard disk. Before you can read this setup file, you need to enable the EM 300 to accept changes. To do this, select Edit on the menu bar and choose Edit enable.

  • Page 146: Tru Input Interfaces

    Kongsberg Simrad EM 300 / Base version Further information about this password is found in the System Administration Maintenance Manual. chapter in the EM 300 Help This option provides on-line documentation. TRU Input Interfaces Overview The EM 300 Transceiver Unit is equipped with four serial ports to interface external time critical sensors.
  • Page 147 Operation menus TRU Input Interfaces Input On: Port 1 None Even 1200 2400 4800 9600 19200 Reset Selections Simrad90 Positions GGA Positions GGA - RTK Positions GGK Positions GST Pos. Quality NMEA 0183 DBS Depth NMEA 0183 DPT Depth Height HDT Heading ZDA Clock (CD4353EB)

  • Page 148: Positioning Systems

    Kongsberg Simrad EM 300 / Base version Serial line specifications Parity - Use these buttons to select the parity for the currently selected serial port. Stop Bits - Use these buttons to select the number of stop bits for the currently selected serial port.
  • Page 149 Operation menus Figure 43 Positioning Systems Positioning System On Up to three positioning systems may be defined. Data from all of them are logged, and may be used in post-processing. However, only the positioning system you have selected as “active” will be used by the EM 300 system in its real-time displays.
  • Page 150 Kongsberg Simrad EM 300 / Base version If this delay is not sufficiently constant - and provided that the time stamp in the position datagram is the time when the position was valid - the input datagram’s time stamp may be used. However, it...

  • Page 151: Active Systems

    Operation menus If neither of the two above solutions are feasible, it may be necessary to connect an external clock to the system, and to estimate during post-processing the relation between the timing of the positions and depth data. Datum This parameter enables you to select which datum the positioning system uses.

  • Page 152: Motion Sensor

    Kongsberg Simrad EM 300 / Base version Pos Filtering Selecting this button makes it possible to remove spikes from positioning data. More details about Active Position Filtering can be found in Technical → References on page 371. Figure 45 Active Pos. Filtering...
  • Page 153 Operation menus Figure 46 The Motion Sensor The offset will be added to the roll values received from the Motion Sensor. If the roll offset is found using the system’s built-in calibration utility it should be applied without any change of sign. Pitch Offset (deg) This setting is used to set a correction offset for pitch values received from the Motion Sensor.

  • Page 154: Stand-Alone Heading Sensor

    Kongsberg Simrad EM 300 / Base version If the data from the attitude sensor are delayed with respect to when they were valid, this may be corrected by the system provided the delay is known. This delay may be due to filtering and/or processing time in the sensor, and should be provided by its manufacturer.

  • Page 155: Clock

    Operation menus Heading Offset This selector is used to set a correction offset for the heading values received from the Heading Sensor. The offset will be added to the values received from the heading sensor. If the heading offset is found using the system’s built-in calibration utility it should be applied without any change of sign.

  • Page 156: Misc. External Trigging

    Kongsberg Simrad EM 300 / Base version For more information about timing, please refer to the Clock in the Datagram formats chapter in the EM 300 Maintenance manual. Set Source This selector is used to define the source for the synchronization of date and time.
  • Page 157 Operation menus These locations must be related to the vessel’s reference point. The position of each system must therefore be given as a forward (X), downward (Z) and starboard (Y) position relative to the reference point. The coordinate system assumes that the X-axis follows the vessel’s keel, and that the X-Y plane is horizontal while the vessel is in normal trim.

  • Page 158: Installation Angles

    Kongsberg Simrad EM 300 / Base version Transducer arrays Use these settings to define the physical location of the centre of the respective transducer arrays at their lowest point. Motion sensor The Motion Sensor parameters allow you to define where the sensor is physically located, or where its data are valid.
  • Page 159 Operation menus Receiver Specify the installed Rx array: 1, 2 or 4 degrees. Transmitter Specify the installed Tx array: 1 or 2 degrees. Figure 52 System Parameters BS (Backscatter) Offset (dB) The measurement of acoustic backscatter strength of the bottom is in principle a calibrated meaurement with typical accuracy ±1 dB.

  • Page 160: Manual Control

    Kongsberg Simrad EM 300 / Base version Manual Control Overview The Manual Control window is accessed when you select Show and then Manual Control from the main menu in the Runtime Menu window. Using the Manual Control options, you can overrun several of the parameters set automatically by the echo sounder.
  • Page 161 Operation menus Refer to page 142 for further information about the Gain dialogue box. → Range Only The system will perform normal bottom tracking. As in manual, the automatic control of the Fixed Gain, Oblique Backscatter, Normal Incidence Backscatter level and the TX power level, is disabled.
  • Page 162 Kongsberg Simrad EM 300 / Base version Phase Detect Scaling This parameter can be used to reduce the amount of samples used to do bottom detect based on the interferrometric phase. Normal selection is 100 %, but the number of samples can be reduced in step of one % down to 20 %.

  • Page 163: Simulator

    Operation menus Simulator Overview The Simulator dialogue box is accessed when you select Show and then Test from the main menu in the Runtime Menu dialogue box. The built-in simulator allows you to practise your skills on the echo sounder system even without leaving port. You can also use it to train new operators, or to perform troubleshooting on an external logging and display system.
  • Page 164 Kongsberg Simrad EM 300 / Base version Slant Across - Change this parameter to modify the across slant angle of the simulated bottom. Note The simulator will not correct for attitude input, so a roll input will make the bottom roll!

  • Page 165: Built-In Self Test

    Operation menus Built-In Self Test Overview The Built-In Self Test dialogue box is accessed when you select Show and then Test from the main menu in the Runtime Menu window. The Built-In Self Test options provide a number of automatic tests that may be started to check the operation of the echo sounder system.

  • Page 166: Bist Options

    Kongsberg Simrad EM 300 / Base version Reset Press this button to erase all the current information in the message field. Print Press this button to print all the current information in the message field. The output is automatically sent to the default printer connected to the system.
  • Page 167 Operation menus This test check the Beamformer and Signal Processing circuit boards in the EM 300 Transceiver Unit. TX Power This test checks the high voltage power supply in the EM 300 Transceiver Unit. All the output levels are tested. Note This test may take several minutes! TX RAM &Fuse...

  • Page 168: Message Field

    Kongsberg Simrad EM 300 / Base version Message field The reports issued by the built-in test programs are shown here. 160719 / /F...

  • Page 169: I/O Interfaces

    I/O Interfaces 5 I/O INTERFACES Overview Various data may be imported to or exported from the EM 300 Operator Station on serial lines. The imported data may come from another computer (in which case specific formats must be used) or directly from sensors.

  • Page 170: I/O Functions

    Kongsberg Simrad EM 300 Base version I/O functions The I/O functions are enabled by selecting the corresponding option button beside the function name. A green button indicates that the function is currently active. The different I/O functions are listed by group as follows:...
  • Page 171 • SV Plus Probe Profiling - generate a profile using data collected with the AML SV Plus probe • AML Calc Format Profile • KS SSP Profile Datagram • Kongsberg Simrad ASCII Profile Datagram • Kongsberg Simrad Binary Profile Datagram Datagram Input: • Tide Datagram Output: •...

  • Page 172: Menu Commands

    Kongsberg Simrad EM 300 Base version Menu commands The menu includes the following commands: File - Save - saves current settings - Read - allows you retrieve previous values - Exit - closes the I/O Interfaces dialogue box Edit - Device Setup...

  • Page 173: Edit Menu

    I/O Interfaces Edit menu Device Setup Figure 57 The Device Setup dialogue To modify the device setup for any given function, select the function from the I/O Functions button at the top of the dialogue box. The various fields and items available for selection in Device Used are then updated according to the I/O Function chosen.

  • Page 174: Probe

    CALC format defined in the Applied Microsystem’s Total System Software, or to proprietary formats defined by Kongsberg Simrad. They are the SSP format, the SIMRAD ASCII format originally defined for the EA500, and the SIMRAD Binary format originally defied for the EM12 and also used by the EM 950/1000.

  • Page 175: Sv & P Smart Probe Profile Input

    I/O Interfaces SV & P Smart Probe Profile Input When SV & P Smart Probe Profiling is enabled under Profiling Input, the SV & P Smart Probe Profile Input controls at the bottom of the I/O Interfaces dialogue box become active for selection.
  • Page 176 Kongsberg Simrad EM 300 Base version Open the I/O Interfaces on the EM 300 Launchpad. Click the SV&P Smart Probe Profiling option button. Lower the probe to a stable position beneath the water surface. Apply power to the probe and wait for the displayed values to stabilize.

  • Page 177: Sv Plus Probe Input

    I/O Interfaces SV Plus Probe Input The SV Plus Probe is configured, monitored and managed from the SV Plus Probe Profiling section of the Probe Controls window. The section may be expanded or collapsed using the section title button. The default state is collapsed. The section contains several subsections whose titles are used as section titles below.
  • Page 178 Kongsberg Simrad EM 300 Base version Current Logfile Displays name of file local to the probe containing probe sampling data. Current Sample Rate Displays current probe sample rate. One Scan Displays one scan of data using the current setup. Data Management Fetch &...
  • Page 179 I/O Interfaces Figure 59 The Device controls dialogue box, SV Plus Probe Profiling. Erase Logfile Lists all files local to the probe available for erasure. The files are echoed in the input verification area and in a popup selection window. Several files at a time may be selected in this window. When the OK button is activated, a verification box listing the selected files is presented.
  • Page 180 Kongsberg Simrad EM 300 Base version Monitoring: Create Profile from Data This option is used to switch On / Off logging of realtime data. Realtime data is only available when the probe is deployed with a communication cable attached. In addition, monitoring of probe data must be activated.
  • Page 181 I/O Interfaces The Use Sound Speed Delta and the Pressure Delta options in the Sampling By Time Extensions frame should both be deselected. Sound Speed based Use the Sample Mode option menu to select the By Sound Speed option. This option configures the probe to sample continuously and to log a data scan only when the sound speed has changed with a value specified in the Sound Speed Delta input field.

  • Page 182: Ping Display

    Kongsberg Simrad EM 300 Base version 6 PING DISPLAY Purpose The Ping Display presents a real-time view of the system performance. The display shows the raw data from the system after corrections have been applied for vessel attitude and sound speed.

  • Page 183: Crosstrack Display

    The Ping Display Refer to page 180. → • Displays Refer to page 187. → • Help Figure 60 The Ping Display main window Crosstrack Display This display shows the measured depths in all beams from the last ping. Different colours are used to show if a beam has a valid bottom detection, and if so what type of detection has been used: 160719...

  • Page 184: Beam Intensity

    Kongsberg Simrad EM 300 Base version • Red to show beams with phase detection • Blue to show beams with amplitude detection • Beams without any detection are not shown Legends describing these colour codes may be shown along the bottom of the display.

  • Page 185: Waterfall

    The Ping Display Turning legends and scales off will expand the display area containing the bars. Parameters controlling these displays may be found in the Parameter Window or as menu items in a popup menu. Please refer to page 169 for the Common display controls, and page 172 →...

  • Page 186: Cdd Display - Colour Coded Depth Display

    Kongsberg Simrad EM 300 Base version Parameters controlling this display may be found in the Parameter Window or as menu items in a popup menu. The data is shown as on an oscilloscope, with time on the horizontal X axis and level on the vertical Y axis.

  • Page 187: Time Based Displays

    The Ping Display Note Increasing the history buffer increases the processing time of this display function, resulting in reduced update rate! You may at any time switch CCD presentation mode by using the rightmost mouse-button and select wanted mode from the display mode selection popup-menu.
  • Page 188 Kongsberg Simrad EM 300 Base version • Roll/Pitch, using data from Inactive Motion Sensor • Backscatter - Centerbeam • Backscatter - 4 Beams, user-selectable • Across - 4 Beams, user-selectable Y1 Axis (Lefthand Axis): • Heave, Active Motion Sensor • Heave, Inactive Motion Sensor •...

  • Page 189: Operational Procedures

    The Ping Display Operational procedures Windows The Ping Display operates with these windows: • Crosstrack display • Beam Intensity display • Waterfall display In addition, the following optional display may be shown: • Scope display • CCD Display (Colour Coded Depth Display) •...
  • Page 190 Kongsberg Simrad EM 300 Base version Figure 62 The Ping Display icon Select Options on the main menu bar. Select Parameters on the drop-down menu. To change display update rate Select Options on the main menu bar. Select Parameters on the drop-down menu.

  • Page 191: Special Display Controls

    The Ping Display Special display controls Special Single Beam controls To modify the beam width Select Options on the main menu bar. Select Parameters on the drop-down menu. In the Single Beam section enter the EA500 beam width used for the EA sounder.

  • Page 192: Popup Parameter Selection

    Kongsberg Simrad EM 300 Base version Select Options on the main menu bar. Select Parameters on the drop-down menu. To modify type of data displayed The section contais one button for each type of data • Amplitude • Phase • Filtered Amplitude •...

  • Page 193: Common Parameters

    The Ping Display Point the mouse cursor in the window that you want to change displayed type of data. Press SHIFT + Mouse Button 3 in the selected window and a popup menu appears. Active parameters in that window have a green indicator to the left.
  • Page 194 Kongsberg Simrad EM 300 Base version • On: Horizontal gridlines are displayed. Waterfall Display does not have any grid lines. Time Based Graphs Sync. Time Axis • Off: All data from all buffers are displayed disregarding any difference in buffer start- and end-time.
  • Page 195 The Ping Display • On: The data is scaled (if scaling is activated) using the Depth Delta parameter found in the Parameter Window. Has the effect of smoothing spiky data. Display Selection To modify displayed data type All displays except the Waterfall diplays may change the type of data being presented.
  • Page 196 Kongsberg Simrad EM 300 Base version • On: Height data is displayed, using the rightmost Y axis. The data buffer contains 100 samples. Roll / Pitch, Active Sensor • Off: No roll / pitch sensor data is displayed • On: Roll / pitch data from the active sensor is displayed, using the rightmost Y axis.

  • Page 197: Display Controls

    The Ping Display • On: EM & EA Depth data is displayed. The EM beam within the footprint of the EA beam is displayed. The data buffer contains 100 samples. Depth Below Keel • Off: No depth data displayed • On: The computed depth-below-keel data displayed. The data buffer contains 100 samples.
  • Page 198 Kongsberg Simrad EM 300 Base version Refer to page 41 for a description of the File Selection dialogue box. → To retrieve a depth file for playback Select Options on the main menu bar. Select Display Control on the drop-down menu.

  • Page 199: Command References

    The Ping Display Command references Introduction This chapter describes the various commands and dialogue boxes used throughout the Ping Display application. The following options are available on the main menu: • File • Options • Display • Help Each of these options have a menu with further commands. In addition, you access the Graph Mode Selection popup menu when you click the right mouse button when the mouse pointer is placed within one of the top two graphs.

  • Page 200: File

    Kongsberg Simrad EM 300 Base version • Other Graphs • Beam intensity • Scope File This selection brings up a menu which only contains one alternative: Exit. This command closes the Ping Display. No warning is given before the Ping Display closes.
  • Page 201 The Ping Display • Scope • Beam Selection Figure 63 The Parameter dialogue box, part 1 Single Beam Used when running a singlebeam- multibeam configuration, to input key information on EA setup. The Single Beam Field includes the Sounder Beam Width parameter. 160719...
  • Page 202 Kongsberg Simrad EM 300 Base version The Sounder Beam Width parameter value depends on the type of transducer used for the EA500. It varies with the frequency, and is a fixed value that may be found in the product specification of the installed EA500 echo sounder.
  • Page 203 The Ping Display Figure 64 The Parameter dialogue box - part 2 Amplitude - This button is used to select whether the amplitude curve should be displayed or not. Phase - This button is used to select whether the phase curve should be displayed or not.
  • Page 204 Kongsberg Simrad EM 300 Base version When Off, the filtered amplitude is again available, and the stave selection slider is made unavailable (insenstive). Detection Info - This button is used to turn the detection information on or off. Stave Selection - This slider is used to select which stave is to be displayed.
  • Page 205 The Ping Display Figure 65 The Display Control dialogue box Line Menu This button activates the Depth File Selection dialogue box which automatically appears when the Playback option is selected. This button allows you to switch to a new playback file while another file is already active.
  • Page 206 Kongsberg Simrad EM 300 Base version Ping Max Depth - The maximum value in the current crosstrack depth curve. Replay Control These buttons acts like the similar physical buttons found on audio or video cassette recorders. They are used for starting and stopping the playback of the file, and for changing the playback position of the file.

  • Page 207: Displays

    The Ping Display Displays This menu item brings up the following pull-down menu: • Tear-off Waterfall • Tear-off Crosstrack • Tear-off Beam Intensity These menu commands all act in a similar way. A copy of one of the displays is put into a new window. This window obeys all the usual window controls, and may be resized, moved, etc.

  • Page 208: Survey Display

    Kongsberg Simrad EM 300 Base version 7 SURVEY DISPLAY Introduction Purpose The purpose of this chapter is to provide detailed information about the commands and parameter settings in the Survey Display main window. Some commands and parameters are used in other display modules, and have the same meaning as they have here, they are only described here.

  • Page 209: Main Menu Commands

    Survey Display Figure 68 The survey display main window The window is also used to start the other graphical tools and displays hosted by the Survey Display. Basic window elements Geographical area - This is the main display area where the survey information is displayed.
  • Page 210 Kongsberg Simrad EM 300 Base version Options - refer to page 216 → Processing - refer to page 217 → Planning - refer to page 296 → 160719...

  • Page 211: File

    Survey Display File Overview The File menu contains general commands for printing and closing the Survey Display utility. When the File menu item is activated a pull-down menu with the following alternatives appears: • Plot • Import DAF contours • Exit Plot This choice allows you to print out the current information in the graphic window.
  • Page 212 Kongsberg Simrad EM 300 Base version Import DAF contours Choose this option to import depth contour lines from a .daf-format file containing depth curves and display them in the Grid Display. If there already are .daf-format depth contour objects in the application, the old ones will de deleted before new objects are inserted.
  • Page 213 Survey Display You may select only one or all of the depth curves. The selected depth will then be displayed on top of all other data in the Graphic Display. If you select only one depth contour from the DAF-file, that depth contour will be automatically be given top priority, and only that depth contour will be available in the list.

  • Page 214: Edit

    Kongsberg Simrad EM 300 Base version Edit Overview The drop-down menu activated by this menu item contains operations for measuring distances and positions, selecting lines, and defining the display regions for the Grid display utility. The right mouse button is used as an edit button when the pointer is inside the geographical area of the window.

  • Page 215: Reset Selection

    Survey Display Reset selection This command deselects all previous selections made. 160719 / /F...

  • Page 216: Keep Function

    Kongsberg Simrad EM 300 / Base version Keep function This option is just a function, and not a dialogue box. It is accessed from the Edit menu in the Survey Control window. The function allows the same operation to be performed over and over again, until an other command is selected on the menu.

  • Page 217: Position

    Survey Display Position The Position function displays the geographical position of the points. It is available from the Edit menu in the Survey Control window. To execute, select this command and press the right mouse button in the geographical area. A position is then written in the information text field at the bottom of the window.

  • Page 218: Distance

    Kongsberg Simrad EM 300 / Base version Distance This function enables you to measure distances in the geographical window. It is accessed from the Edit menu in the Survey Control window. To execute; Press the right mouse button down. Drag the cursor to another position while you hold the mouse button depressed.

  • Page 219: New Display Area

    Survey Display New Display Area This command is used to define a new geographical area to be used by the Grid Display utility. Create an rectangular area with the right mouse button. Note The display area must have been made visible by the settings in the Show/Hide window.

  • Page 220: View

    Kongsberg Simrad EM 300 Base version View Overview The pull-down menu activated by this menu item has menu commands for controlling how the information in the geographical area is presented. The following menu commands are available: • Annotation colours • Show/Hide •...

  • Page 221: Annotation Colours

    Survey Display Annotation Colours The background colour and the colours for the different attributes and objects displayed in a geographical window can be changed to suit your preferences. The Annotation Colours dialogue box is then used. In this dialogue box, the colour for each attribute type can be chosen from a set of 18 different colours.
  • Page 222 Kongsberg Simrad EM 300 / Base version All modules have a common set of items: Background, Selected and Grid, in addition to the specific items for each module. Current settings for each module are saved as a part of the parameter settings for each survey.

  • Page 223: Show/Hide

    Survey Display Show/Hide The Show/Hide dialogue box contains a list of items that may exist in the client area of the geographical window. These items can either be displayed or hidden. A check button for each item indicates the current display status for the item. Figure 71 One example of a Show/Hide dialogue box Some items have two or more sub-items.
  • Page 224 Kongsberg Simrad EM 300 Base version Legend The colour legend of the different objects in the display is toggled on/off by this button. Use this field to enter the course offset for the Helmsman Display. Select Add (degrees * 10) first.

  • Page 225: Colour Mapping

    Survey Display Colour mapping Modules where the survey data is displayed as a continuous data set, require a definition of the colours to be used. The Colour Mapping dialogue box uses an HLS (Hue, Light, Saturation) model for this purpose. Figure 72 The Colour Mapping dialogue box Colour table This setting is used to select the colour table to use for the...
  • Page 226 Kongsberg Simrad EM 300 / Base version When RGB cube (Red/Green/Blue) is selected, the colour table will be a standard RGB cube colour table defined commonly for all windows on the computer. The colour table of the screen do not change even if you change the HLS settings in the Colour Mapping dialogue box.
  • Page 227 Survey Display • If CCW (Counter-Clock-Wise) is selected, then the lower data value will be displayed using the minimum value defined for the corresponding HLS component, and the upper data value will be displayed using the maximum HLS value defined. •...
  • Page 228 Kongsberg Simrad EM 300 / Base version Acceptance OK - This button is used to implement and save the new colour settings for later use. The dialogue box is closed. Apply - This button allows you to implement the new settings on a trial basis.

  • Page 229: Contour Priority

    Survey Display Contour priority Contour priority is accessed from the view menu in the main window. Select this option to specify if you want to highlight one of the imported contour lines in the Grid Display. Note The Contour priority is for highlighting one of the imported .daf contours only! Note that the contour curve may be visible or hidden depending upon settings you have selected in the...

  • Page 230: Lat/Long Format

    Kongsberg Simrad EM 300 / Base version Lat/Long Format The scales along each of the axes in a geographical window represents geographical latitude and longitude respectively. The latitude and longitude coordinates will be displayed in one of three different formats: •...

  • Page 231: Data Choice

    Survey Display Data choice Overview The purpose of this command is to select the type of beam data to be displayed in the nearest vicinity behind the vessel. In realtime mode, the main geographic window will display data as they are received from the logging process. Only a limited amount of beam data or points behind the vessel will be displayed, and when the number of displayed points has reached its maximum, the oldest points are removed as new points are...
  • Page 232 Kongsberg Simrad EM 300 Base version Quality factor - A data quality measure for each beam. Small values (on a scale from 0 to 128) conveys good data quality. Only the lower 6 bits are used. Ping mode - Which mode the echo sounder was using.

  • Page 233: Update View Area

    Survey Display Update view area The View Area is defined as the rectangle covering the current survey. Figure 76 The View Area This command redraws the view area. Redraw This command updates the current display image with new data received since the image was last generated. 160719...

  • Page 234: Vessel In Centre

    Kongsberg Simrad EM 300 Base version Vessel in centre This command acts like an on/off switch. When the function is activated, a small rectangle appears next to the Vessel in centre command on the menu. By enabling the Vessel in Centre command, the vessels relative position on the screen will be constant.

  • Page 235: Update Interval

    Survey Display Update Interval Update Interval is available from the View menu in the main window. The purpose of this command is to define an automatic display redraw. During normal operations, you may find that the ping rate is very high, or the new positions come very often.

  • Page 236: Options

    Kongsberg Simrad EM 300 Base version Options Overview The pull-down menu activated by this menu item contains only one menu command: • Display Display This command is used to select another workstation as primary or secondary display unit for utilities launched from the main geographical window.

  • Page 237: Processing

    Survey Display Processing Overview All utilities except the main geographical window in the Survey Display software application, are started from the Processing pull-down menu. The utilities that work on specific lines or areas will use lines or areas that are currently selected in the main geographical window.
  • Page 238 Kongsberg Simrad EM 300 Base version The description of the Bridge and Helmsman Display is on page 254. → Sonar Image This utility gives you a reflectivity or backscatter image of the seabed. The Sonar Image application is also accessed from the Launchpad, and it is used during online operations.
  • Page 239 Survey Display The Sonar Image Replay is accessed from the Processing menu, and used during offline operations. The Sonar Image can be found on page 317. → The Seabed Viewer can be found on page 326. → Tape tool This command is used to launch a Motif window utility for tape operations (taking back-ups, restoring back-ups etc.) using the UNIX tar format.

  • Page 240: Tape Tool

    Kongsberg Simrad EM 300 / Base version Tape tool Overview The purpose of the Tape tool utility is to transfer files to and from tape cartridges. The UNIX tar format is used for all tape operations, and the Tape tool utility relieves you from remembering command syntax etc.
  • Page 241 Survey Display One of the tape operations is to obtain a list of all files backed up on the tape. Such a list is called a Table Of Content (TOC), and will include all tar sets on the tape. A TOC may be saved to the hard disk as a uniquely named file, and later used as a reference when files are to be restored.
  • Page 242 Kongsberg Simrad EM 300 / Base version Figure 79 Command Options Using a relative path, it will be backed up as follows: ./sim010209.asvp Using the absolute path, it will be backed up as follows: /home/sv_profile/sim010209.asvp For restore operations, when this check box is checked, the operator must select a directory to where the files should be copied.
  • Page 243 Survey Display Tape operations Overview A tape operation is initiated by selecting one of the seven radio buttons in the Tape tool window, and then pushing the Apply button. The radio buttons are organised under three headings; Backup, Restore and Tape. Backup To back up selected files or directories.
  • Page 244 Kongsberg Simrad EM 300 / Base version Figure 81 Confirmation dialogue Click the OK button to accept. The file names saved together with the files, will be the relative path names or the absolute path names according to the status of Relative Path check button in the Command Options dialogue box.
  • Page 245 Survey Display Figure 82 The Restore Source or Tape Contents window. near the bottom of the window. If more than 5000 files is contained in one tar set, only the first 5000 are available in the TOC Contents list box. To get the next 5000 files, push the down arrow push button to the right of the list box.
  • Page 246 Kongsberg Simrad EM 300 / Base version Figure 83 File Entry window A list of all the files backed up on the tape cartridge is produced when the Apply button is pushed. This Table of Content (TOC) is displayed in the Tape Contents window which is the same as the Restore Source window described in paragraph ...
  • Page 247 Survey Display A file selection box, displaying the TOC files in the default TOC directory, appears when this button is pushed. Select one of the TOC files, and push the OK button. The TOC file will then be sent to the printer. Acceptance Apply: To initiate the currently selected tape operation.

  • Page 248: Import/Export

    Kongsberg Simrad EM 300 / Base version Import/Export Export lines General The purpose of the Import/Export utility is to transfer survey lines from one survey directory to another. All the survey format files representing a survey line, or alternatively only specified file types, are copied.
  • Page 249 Survey Display Some of the buttons encountered in the dialogue boxes described below activate a restricted version of the Kongsberg Simrad SurveyControl utility. Use the File -> Exit menu command, and push the OK button in the resulting confirmation dialogue box to exit from this utility.
  • Page 250 Kongsberg Simrad EM 300 / Base version The following dialogue boxes will appear: • File type selection box • Destination selection box Note The affected survey lines will be deleted from the current survey. Note To see the changes to the current survey, you must exit from the main geographical window and restart Survey Display.
  • Page 251 Survey Display Restore This option is used to restore a tape Backup previously taken with the Backup command, to the current survey directory. All files are restored. The following dialogue box will appear: • A dialogue box informing you about the tape read operation. This box has several buttons, not all of them relevant for the current task.
  • Page 252 Kongsberg Simrad EM 300 / Base version All types - All file types will be included, disregarding the status of the other check buttons. Sidescan - Sonar image data (*.sidescan files) will be included. Depth - Depth data will be included (*.depth files).
  • Page 253 Survey Display The other is a push button to the right of this text input field. Pushing this button, a survey selection dialogue box appears. Click on the survey you want. Use eventually the scroll bar on the right hand side to get more surveys into view. Click on the OK button to confirm the selection.
  • Page 254 Kongsberg Simrad EM 300 / Base version Lines to be COPIED This option is used to show which survey lines are included in the transaction. Use the scroll bars to get more of the list into view. This box is not used for further line selections.

  • Page 255: Planning

    Survey Display Planning Overview The Planning module is an integrated part of the Kongsberg Simrad multibeam echo sounders Neptune post-processing system. It can be started from both the Survey Display and the Grid Display. It allows a fully comprehensive survey plan to be made beforehand, and it also presents a survey plan available during the survey as an integrated part of the multibeam echo sounder operation.

  • Page 256: Grid Display

    Kongsberg Simrad EM 300 / Base version 8 GRID DISPLAY Purpose The purpose of the Grid Display is to display a gridded image of large areas of the survey. This image can be used for a visual inspection of the quality and distribution of the logged data and related data for a specified geographical area.

  • Page 257: Main Menu

    Grid Display Figure 88 The Grid Display main window Main menu The Grid Display’s main menu bar provides the following choices: • File • View • Planning • Crossline • Help The Planning and Crossline modules are explained separately. The Planning utility is described on page 296. →...

  • Page 258: Information Bar

    Kongsberg Simrad EM 300 / Base version Information bar The information bar at the bottow of the window contains information about the scale (for example 1:25000). Tool bar The buttons on the tool bar provides general tools for scaling, mouse operations and panning.

  • Page 259: Operational Procedures

    Grid Display Operational procedures Purpose The purpose of the Grid Display is to display all depths and related data for a specified geographical area. The logged data for this area is then displayed in a dedicated window. The area to be displayed is defined in the main geographical window using the Survey Display’s Edit->New Display Block command.
  • Page 260 Kongsberg Simrad EM 300 / Base version Figure 90 Create grid warning message Press the right mouse button to select an area. Click once on the area border to select it. Select Edit on the Survey Display’s main menu bar.
  • Page 261 Grid Display Select Processing on the Survey Display’s main menu bar. Select Grid Display Realtime on the menu. - The grid is updated continously. Note When the vessel leaves the area defined by the realtime grid, the gridding stops. Note If you define an area for the realtimegridding that is too large, the Grid Display Message dialogue box will appear with a warning.
  • Page 262 Kongsberg Simrad EM 300 / Base version Note When the vessel leaves the area defined by the realtime grid, the gridding stops. Note If you define an area for the realtimegridding that is too large, the Grid Display Message dialogue box will appear with a warning.
  • Page 263 Grid Display You can view and modify the distance between the chart contours. Select View on the main menu. Select Make Contour... on the submenu. Enter the desired contour interval. Press Ok. Once the contour lines are established, you can place depth labels on them.

  • Page 264: Command References

    Kongsberg Simrad EM 300 / Base version Command references Introduction This chapter describes the various commands used throughout the Grid Display. The following options are available on the main menu: • File • View • Planning • Crosslines • Help Each of these options have a number of commands available on drop-down menus.

  • Page 265: File

    Grid Display File Overview The File option on the Grid Display’s main menu bar activates a drop-down menu where the following commands appear: • Plot • Export depth contours... • Import... • Exit Plot This menu command activates the Plot dialogue box. Refer to the dialogue box description on page 43.
  • Page 266 Kongsberg Simrad EM 300 Base version Export depth contours This option exports contour lines to an output file. You can select from the following options: • plotmtv • DAF You can also select the output file name. Plotmtv is a general purpose graphics utility available on the Internet.

  • Page 267: View

    Grid Display View Overview The drop-down menu activated by this option contains commands for information presentation. • Annotation colours • Show/Hide • Lat/Long format • Colour Mapping • Contour Priority • Selections • Vessel in center • Make contour • Contour Labels at •...
  • Page 268 Kongsberg Simrad EM 300 Base version Note that the contour curves may be visible or hidden depending on settings you have selected in the Show/Hide dialogue box. The Selections command provides a small submenu with two choices: Reset selection and Lines. The first option deselects the currently selected line in the main window, and empties the edit buffers.

  • Page 269: Make Contour

    Grid Display Make Contour Make contour is available from the View menu. This dialogue box enables the necessary computations to display the contour curves connecting all the points with equal depth. The dialogue box (shown below) asks for the current contour interval in meters.

  • Page 270: Contour Labels At

    Kongsberg Simrad EM 300 Base version Contour Labels At Once contour lines are enabled, you can choose at which levels the contour curves should have labels displaying the depth. The following options are available: • Every level • Every second level •...

  • Page 271: Shading Parameters

    Grid Display Shading parameters This menu option allows you to choose the “amount of shading” to be applied when the Sun illumination alternative is selected on the Grid/Cell sub-menu. Options are: • Normal • 2 * Normal • 4 * Normal •...

  • Page 272: Create Grid

    Kongsberg Simrad EM 300 Base version Create Grid This command is used to define the grid’s cell size for the Grid Display utility. The option brings up a dialogue box to define the size of the grid cells. Note The generation of the cells takes much of the system resources, and...
  • Page 273 Grid Display Figure 93 Create Grid warning A subsequent re-definition of the reference grid will force the system to compute depths values for the new cells, which will take some time if the amount of data is large. Try to select the right cell size early in the survey. A good rule is to define the reference grid when the first line has been finished, and before the start-up of the next.

  • Page 274: Bridge And Helmsman Display

    Kongsberg Simrad EM 300 Base version 9 BRIDGE AND HELMSMAN DISPLAY Purpose The Bridge and Helmsman Display is designed to view track and coverage data. It presents a geographical view of the current survey area with vessel position, survey lines and swath coverage. On the Bridge and Helmsman Display various steering information with regard to the current survey line may be displayed.
  • Page 275 Bridge and Helmsman Display Figure 94 Bridge and Helmsman Display. The Helmsman information is in the grey areas of the window. The Tool bar provides easy access to a number of view functions. The Tool bar is explained on page 48. →...

  • Page 276: Operational Procedures

    Kongsberg Simrad EM 300 Base version Operational procedures Windows The Bridge and Helmsman Display operates in a single window. In this window you can view the survey lines. Start and exit Before you start the Bridge and Helmsman Display The Bridge and Helmsman Display is designed to run on a local workstation/x-terminal/remote display on the vessel’s bridge, and...

  • Page 277: Common View Procedures

    Bridge and Helmsman Display Clock OK to apply. To start the Bridge and Helmsman Display The Bridge and Helmsman Display is started from the Survey Display’s main menu as follows: Select Processing on the main menu bar. Select Bridge Display on the pull-down menu. You can also start the Bridge and Helmsman Display from the launchpad using the icon.
  • Page 278 Kongsberg Simrad EM 300 Base version Use small fonts - Toggle between small and large fonts. Output to Autopilot - Output of NMEA APB datagrams. Automatic line direction - Automatically sets the active lines direction. The XTE deviation indicator displays the distance from the ship to the active line.
  • Page 279 Bridge and Helmsman Display For the Helmsman display the operator can set the colours of the background, the letters and the indicator in the XTE deviation indicator. Remember that these settings are stored to file only when Survey Display exits so it is really the operator of Survey Display who decides what the colours should be.
  • Page 280 Kongsberg Simrad EM 300 Base version If you change the planned job in Survey Display, you need to restart the Helmsman display in order to view the changes. Automatically setting the lines’ direction may fail in some circumstances, like if the ship is close to the middle of the line when it is activated, or if you try to activate the current active line.

  • Page 281: Command References

    Bridge and Helmsman Display Command references Introduction This chapter describes the various commands used throughout the Bridge and Helmsman Display application. The following options are available on the main menu: • File • Edit • View Each of these menu options have a number of commands available on pull-down menus.

  • Page 282: Edit

    Kongsberg Simrad EM 300 / Base version Edit The Edit option on the main menu bar contains these commands: • Reset selection • Keep function • Position • Distance • New Display Area • Resize Display Area Reset selection is described on page 195.

  • Page 283: View

    Bridge and Helmsman Display View The View option on the main menu bar contains the following commands: Several of these menu options are identical to the options on the Survey Display main menu. These have been described previously in this document as follows: Annotation colours;...

  • Page 284: Calibration

    Kongsberg Simrad EM 300 / Base version 10 CALIBRATION 10.1 Introduction Purpose The purpose of the Calibration utility is to analyse survey data to discover any systematic error in the roll, pitch or heading received from the attitude sensor and the time delay of the positioning systems.

  • Page 285: Main Window And Menu Bar

    Calibration utility The Calibration utility is designed for determination of sensor offsets. It is NOT intended for determining the angular orientation of the system transducers, these must be determined through measurements as described in the installation manual. The reason for this is that it is not possible to do a linear addition of sensor offsets and transducer orientation angles.
  • Page 286 Kongsberg Simrad EM 300 / Base version Figure 96 Calibration main window 160719 / /F...

  • Page 287: Calibration Survey

    Calibration utility 10.2 Calibration survey Introduction The correct calibration of the vessel attitude sensors and the time delay of the positioning system is vital to the quality of the data collected by the multibeam echo sounder. While modern motions sensors have little or no drift with time, they may fail. The time delay of the positioning system may vary according to system set-up.
  • Page 288 Kongsberg Simrad EM 300 / Base version The slope used for pitch and time delay calibration should have an appreciable relative change in depth from top to bottom, say 30%, if pitch offset and time delay are to be resolved accurately. Note...

  • Page 289: Roll Offset In The Acrosstrack Direction

    Calibration utility Roll offset in the acrosstrack direction Choose a horizontally flat area (at least acrosstrack). Survey a sufficiently long line twice in opposite directions. Ensure that a sufficient lead-in time to the line is used for the roll sensor to stabilize.

  • Page 290: Pitch Offset And Time Delay

    Kongsberg Simrad EM 300 / Base version If there is a roll offset, there will be a depth difference between the two data sets, linearly increasing with acrosstrack distance from the centre. Pitch offset and time delay Choose an area with a continuous but not too steep slope alongtrack.
  • Page 291 Calibration utility Side view Survey line Seabed Slope (CD3571) Top view Survey line Slope Calibration corridor Figure 98 Pitch offset and time delay calibration procedure Refer to figure 99 on page 272. → Alternative 2 Find an easy recognizable point or feature on the bottom such as a peak or a depression.
  • Page 292 Kongsberg Simrad EM 300 / Base version Side view Survey line Seabed Slope (CD3571) Top view Survey line 2 Survey line 1 Slope Calibration corridor Figure 99 Heading offset calibration procedure (Alternative 1) The corridor used to compare data from the two survey data sets should be placed so that it intersects the feature, and is parallel to the survey lines.

  • Page 293: Verification

    Calibration utility Side view Survey line Reference point Seabed (CD3572) Top view Reference point Survey line Survey line Calibration corridor Figure 100 Heading offset calibration procedure (Alternative 2) Verification After the calibration has been completed, we strongly advise you to repeat the procedure for verification. This is especially necessary if you initially had large errors (exceeding 1 - 2 degrees).

  • Page 294: Sound Speed Quality Inspection

    Kongsberg Simrad EM 300 / Base version Sound speed quality inspection Use one or more pairs of lines on a flat sea floor, where the lines are perpendicular to each other. This means that the two lines in the pair cross each other on a flat area of the sea floor with a difference in the sailing direction of about 90 degrees.
  • Page 295 Calibration utility Side view Survey line Flat seabed (CD 1065) Top view Calibration corridor 1 Survey Survey line 1 line 1 Calibration Survey corridor 2 line 2 Figure 101 Sound speed profile check. 160719 / /F...

  • Page 296: Command References

    Kongsberg Simrad EM 300 / Base version 10.3 Command references Overview This chapter describes the various commands used throughout the Calibration utility. The next pages describes the various commands used throughout the Calibration utility, and refers to other descriptions as required.

  • Page 297: Edit

    Calibration utility 10.4 Edit Overview The Edit option on the main menu bar contains these commands: • Reset selection • Keep function • Position • Distance • New line • Move point • Move region • Delete region • Pitch calibration •...
  • Page 298 Kongsberg Simrad EM 300 / Base version The other Edit commands are described on the next pages. 160719 / /F...
  • Page 299 Calibration utility New Line This command is used to create a new calibration corridor. Depth profiles will be made along this corridor. After this menu command has been selected, a new line is made by placing the pointer at an initial point, pressing the right mouse button and dragging the pointer to where the line should end.

  • Page 300: Pitch Calibration

    Kongsberg Simrad EM 300 / Base version Pitch Calibration This command is used to analyze data in the region around a calibration line in order to do pitch and/or position delay calibration. Use the following procedure: Select two separate lines to use for pitch calibration. These lines should cover the same track, but be in opposite direction.

  • Page 301: Calibration Profile Windows

    Calibration utility - When you run your multibeam echo sounder according to these two lines, the covered area must overlap between the lines. In the commonly covered area, you must also make sure that you have an easily identified obstacle, such as a large rock or a wreck on the seabed.
  • Page 302 Kongsberg Simrad EM 300 / Base version Figure 102 Calibration profile window for roll calibration Figure 103 Calibration profile window for pitch/time calibration Information and tool bar This information shows the heading of the two lines. The same colours as applied for the depth profiles, are used to distinguish the two lines.
  • Page 303 Calibration utility • The calibration profile window for pitch/time contains two slide bars. One is used for the time offset of the positions, and the other for the pitch offset. The current offset values are displayed above each slide bar. The slide bars are used to change the offset values by dragging the slider, clicking on the arrows (the values change in minor steps) or clicking to either side of the slider (the values change in major...
  • Page 304 Kongsberg Simrad EM 300 / Base version • SubStep Step is the change made to the value when the mouse pointer is clicked on either side of the slider, and SubStep is the change made to the value when clicking on the arrows.

  • Page 305: View

    Calibration utility 10.5 View Overview The View option on the menu bar contains these commands: • Annotation colour • Show/Hide • Lat/long format • Colour mapping The Annotation Colours command presents the Annotation Colours dialogue box, where you can modify the various colours used in your graphical window presentations.

  • Page 306: Help

    Kongsberg Simrad EM 300 / Base version Help The Help option provides on-line help. 160719 / /F...

  • Page 307: Crosslines

    Calibration. Crosslines is available from several of the geographical displays in the Kongsberg Simrad multibeam echo sounders and postprocessing systems. Crosslines may then be defined and viewed. The survey lines from which data is to be analyzed are selected in the survey display and a crossline is also selected.

  • Page 308: Operational Procedures

    Kongsberg Simrad EM 300 Base version 11.2 Operational Procedures To start a new crossline Start the Survey Display. Select Displays. Select Create Grid. Select Displays. Select Grid Display. Select Crosslines. To save a crossline Select Save Crosslines on the Crosslines menu.

  • Page 309: To Assign A Sound Velocity Profile To A Crossline

    Crosslines Select Change Width of Selected Crossline on the Crosslines menu. Enter the new width value in the dialogue box. - The width value is entered in meters. Press Ok to apply and close, or Cancel to close the dialogue box without changing the width.

  • Page 310: Crosslines Menu

    Kongsberg Simrad EM 300 Base version 11.3 Crosslines menu Overview The Crosslines utility is accessed as a command, and controlled from a sub-menu. You may find it convenient to “tear off” this sub-menu to place the Crosslines menu in a separate window.

  • Page 311: Save Crosslines

    Crosslines Refer to page 288 for the procedure. → Save crosslines Use this command to save the crossline definitions and the selection of survey lines to a file for later use in the current or other geographical displays. This is not required if the crossline display is entered immediately as the file will then be generated automatically when exiting that display.

  • Page 312: Crosslines Window

    Kongsberg Simrad EM 300 Base version 11.4 Crosslines window Overview In the main geographical window, the crossline number is always displayed in the beginning of the line. In the Crosslines display, the selected line(s) are shown with the names and the corresponding line depths identified using the same colour.

  • Page 313: File

    Crosslines File The only command on the File menu is Exit. Use this command to close the window. Edit You can reprocess the data in the crosslines with new offsets in time, roll and pitch, and he can reprocess the data with new sound speed profiles.

  • Page 314: View

    Kongsberg Simrad EM 300 Base version View The view menu is used to control the display. Assign crosslines to windows There are four windows defined in displayCrosslines. There can be 15 crosslines at one time. In this interface you can decide which crossline should be displayed in what window.
  • Page 315 Crosslines Set scales You can set the desired scale in the x- and y-direction. The x-direction is centimeters along the crossline and the y-direction is centimeters depth. The y-scale defines how many centimeters depth there is per centimeter on the screen. The x-direction defines how many centimeters along the crosslines there is per centimeter on the screen.

  • Page 316: Planning

    Kongsberg Simrad EM 300 Base version 12 PLANNING 12.1 Introduction A survey is seldom performed without any planning being done beforehand. A comprehensive plan would normally define the following: • the area to be surveyed • the survey lines which the vessel must follow •...
  • Page 317 Planning The planned lines must take into account islands, coastlines, shoals or other obstacles within the survey area which may limit a safe and efficient survey. The achieveable coverage of the multibeam echo sounder and the overlap required between the neighboring lines is usually used to determine the line spacing.

  • Page 318: Survey Planning

    Kongsberg Simrad EM 300 Base version 12.2 Survey planning Introduction A survey is normally planned taking into account • echo sounder coverage • seabed topography • sound speed variations • current weather conditions. The dedicated tool for the Planning is described on page 296. Operational →...
  • Page 319 Planning Aeration is a function of sea state, but also of the heading with respect to the wave direction and the vessel speed. It is strongly advised that one builds a record of coverage and aeration problems versus sea state, heading with respect to wave direction, and vessel speed.

  • Page 320: Operational Procedures

    Kongsberg Simrad EM 300 / Base version 12.3 Operational procedures Introduction These operational procedures cover the main functions available in the Planning utility. To open a job Select Jobs -> Open. - A small dialogue box appears. It lists the current jobs available, and allows you to select on.
  • Page 321 Planning Figure 107 Creating parallel lines 160719 / /F...
  • Page 322 Kongsberg Simrad EM 300 / Base version To create a polygon Select Planning -> Polygons. - A submenu appears. Click on the tear-off line to place the menu in a separate window. Select New on the submenu. Create the polygon by holding down the right hand mouse button.

  • Page 323: Command References

    Planning 12.4 Command references Introduction The following commands are available from the Planning menu: • Jobs • Print • Lines • Polygons • Activate line • Deactivate line • Select all lines • Export selected lines • Import planned shoals from BinStat 160719 /F...

  • Page 324: Jobs

    Kongsberg Simrad EM 300 Base version Jobs Overview A “job” is a collection of planned lines and possibly one or more polygons. Each job is given a unique name. A job must first be selected as the current job before any other operations can be performed.
  • Page 325 Planning Figure 109 The Options dialogue box Refer to figure 110 → Figure 110 The Open Job window Delete Use this command to delete a current job. You are given a warning before the system allows you to delete the job. Options The Options choice on the Jobs submenu allows you to define the coordinate format, i.e.

  • Page 326: Print

    Kongsberg Simrad EM 300 Base version The planning module is available in the Survey and the Grid Display. A plan made in one module will be available in all the other modules of a system. In case a job is saved in one module...

  • Page 327: Lines

    Planning Lines Overview The Lines submenu is used for all line manipulations such as creation, editing, deletion or selection. The following options are available on the submenu: • New • Edit... -> • Move • Reverse direction • Delete • Parallels... •...
  • Page 328 Kongsberg Simrad EM 300 Base version Refer to figure 112 → Figure 112 The Edit lines dialogue box The line or polygon to be edited is selected from list containing all selected lines and polygons. A new line is also available in the list, and it may be turned into a new polygon by clicking the toggle button This is a polygon, not a line.
  • Page 329 Planning Note A line must have at least two coordinates and a line name. A polygon must have at least three coordinates. Any changes are only committed after clicking the button Ok or Apply. Rename... This command can be used to rename any of the planned lines. You can only rename one line at the time.
  • Page 330 Kongsberg Simrad EM 300 Base version Figure 113 Select Lines dialogue box • Select lines from list below: lines are selected by clicking on their names. • Select all lines created between these two times: lines are selected through the date and time the lines were created and the entered time limits (the time of creation is stored allthough it is not visible).
  • Page 331 Planning Cancel selections Use this option to deselect previously selected lines (not polygons). Keep function Selecting Keep function will allow repetition of the chosen function many times without clicking in the menu. Selecting Keep function again allows a new item from the menu to be chosen. The command is also described in general terms on page 196.

  • Page 332: Polygons

    Kongsberg Simrad EM 300 / Base version Polygons Overview The following options are available from this submenu: • New • Edit • Delete • Fill • Clip selected lines • Keep function Use this command to create a polygon. Note A polygon must have at least three points.
  • Page 333 Planning Figure 114 The Fill polygon dialogue box All the lines which are created in this way are given new linenames by the system. There is no point in editing this line (changing the linename or adding information to the line) prior to using it in this operation sincxe they are also given new linenames by the system.
  • Page 334 Kongsberg Simrad EM 300 / Base version Keep function This command works the same way as the Lines -> Keep function. The command is also described in general terms on page 196. → 160719 / /F...

  • Page 335: Activate Line

    Planning Activate line After a line has been selected it can be made active. The active line is usually the current line to survey. The information on the bridge and helmsman’s displays will depend on which line is active. Deactivate line Deactivates the active line.
  • Page 336 Kongsberg Simrad EM 300 Base version Figure 115 The Import form BinStat dialogue box Importing planned shoals from BinStat from the same survey several times will only retain the last imported set, but several sets may be imported from different surveys.

  • Page 337: Sonar Image

    Sonar Image 13 SONAR IMAGE 13.1 Purpose The Sonar Image utility displays the seabed image data. For each ping a straight line is plotted, this covers the swath width. The darkness of the display at any point represents the reflectivity of the bottom.

  • Page 338: The Sidescan Window

    Kongsberg Simrad EM 300 / Base version These are described on page 320. → The sidescan window The Seabed window presents the graphical result of the processing. 160719 / /F...

  • Page 339: Operational Procedures

    Sonar Image 13.3 Operational procedures To start the Sonar Image Select the following command sequence in the Survey Display: Select Processing on the main menu. Select Sonar Image on the drop-down menu. This opens the Sonar Image dialogue box. There is one small difference in this dialogue box between the two operational modes: In replay mode, a push-button to select the line to be replayed is added to the top of the dialogue box.

  • Page 340: Command References

    Kongsberg Simrad EM 300 / Base version 13.4 Command references Overview As previously described, the Sonar Image opens with the Ss real-Time dialogue box, while the sidescan window only presents the graphic result. The settings to be made in the Ss real-Time dialogue box are described on the following pages.
  • Page 341 Sonar Image Pixel reduction method This setting is used to select which method to use for representing multiple data values by one pixel. Each pixel may cover multiple data values and the following alternatives exist for deriving the pixel value: Average - The average of all samples.
  • Page 342 Kongsberg Simrad EM 300 / Base version Position The positions, as found in the position datagram, are used for calculation of the alongtrack scaling. Jump limits These settings are used to define the limits which the system will accept as “jumps” in position and speed. You can set these values in the text fields to the right of the following labels: •...
  • Page 343 Sonar Image Amplitude adjustment This setting is used to select how the amplitude strength is presented in the display. The displayed data represents the amplitude strength of the Sonar Image samples. The way to scale the amplitude on the display can be set by the following methods: •...
  • Page 344 Kongsberg Simrad EM 300 / Base version Swath width The width across the entire display (plot) can be set here. This is done by entering the desired width in meters to the right of the label Swath width (m):. Tic distance This setting allows you to so set the distance (in meters) between distance annotations.
  • Page 345 Sonar Image Stop - Push this button to stop the display or plot. Continue - Push this button to continue processing after a stop command. The display continues from the stop position, but new settings of the dialogue box are applied, if they have been changed. Exit - Use this button to exit from the Sonar Image utility.

  • Page 346: Seabed Viewer

    Kongsberg Simrad EM 300 / Base version 14 SEABED VIEWER 14.1 Purpose and description The Seabed Viewer is designed to display seabed image data in a scrolling window. It displays one line per ping, and does not perform geographical corrections with regard to the vessel’s heading and speed.

  • Page 347: Operational Procedures

    Seabed Viewer The following commands and options are available from the the Seabed Viewer main menu bar: • File • Options • Help The menu options and the respective commands attached to them are explained in the Command References chapter on page 329. The Seabed Viewer window is shown in figure 118.

  • Page 348: Amplitude Control

    Kongsberg Simrad EM 300 / Base version Select Options on the main menu bar. Select Parameters on the pull-down menu. Use the Update frequency slider to choose the preferred speed. Amplitude control You can control the amplitude both in playback and realtime mode, or you can set it to control itself automatically.

  • Page 349: Command References

    Seabed Viewer 14.4 Command references Introduction This chapter describes the various commands used throughout the Seabed Viewer application. The following options are available on the main menu: • File • Options • Help Each of these menu options have a number of commands available on pull-down menus.

  • Page 350: Options

    Kongsberg Simrad EM 300 Base version 14.5 Options Overview The Options menu on the main menu bar in the Survey Display contains these commands: • Parameters • Realtime Mode • Playback Mode (CD4370) Figure 119 The Parameter options Parameters When you select Parameters... on the Options menu, a dedicated window opens to present you the choices.
  • Page 351 Seabed Viewer • Screen colours In addition, you have access to the three control buttons for playback mode: • Play • Stop • Fast forward Playback speed Update frequency - This option is only available during playback mode. It specifies how fast data will be replayed. A higher number means faster replay of data.

  • Page 352: Realtime Mode

    Kongsberg Simrad EM 300 Base version • 6 Colours - Same as 3 Colours, except that six colours are used: blue, cyan, green, yellow, magenta and red. Playback control [PLAY] - Start display of data. This option is only available in Playback Mode.

  • Page 353: Sound Speed Profile Editor

    Sound Speed Profile Editor 15 SOUND SPEED PROFILE EDITOR 15.1 Purpose and overview The purpose of the SSP Editor is to: • Edit or inspect existing sound speed profiles • Create new sound speed profiles The SSP Editor is launched from the Sound Speed parameter form in the EM 300 main operator window.

  • Page 354: The Edit Area

    Kongsberg Simrad EM 300 Base version Figure 120 The SSP Editor main window Refer to page 341. → The Edit area The Edit area is the large area on the right hand side of the window. It has two axes: •...

  • Page 355: The Command Area

    Sound Speed Profile Editor Only the editable profile can be saved to disk. The two static profiles are only auxiliary profiles used to create new editable profiles. They are read in from the hard disk, may be changed locally in the edit buffers, but can not be saved to disk. The profiles are identified by their colour.

  • Page 356: Communication Area

    15.3 File formats The SSP Editor operates on files, and accepts two different file formats: The Kongsberg Simrad Survey format, identified by the sfsvp file name extension, is a binary format used for files generated during logging. These files contain the profiles actually applied in the real-time computations giving each sounding depth and position values.

  • Page 357: Operational Procedures

    Sound Speed Profile Editor 15.4 Operational procedures Windows The SSP Editor operates with a single window: • SSP Editor This window is referred to as the main window in this document. In this window, you can view the sound speed profiles. Start and exit To start the SSP Editor The SSP Editor is started from EM 300 as follows:...

  • Page 358: Modify And Delete

    Kongsberg Simrad EM 300 / Base version To create new a sound speed profile Select File on the main menu bar. Select New profile if you wish to create a brand new profile from scratch. Place the mouse pointer in the edit area.
  • Page 359 Sound Speed Profile Editor To modify a profile To move a point Select Edit -> Move point on the menu bar. Place the circular mouse pointer on the point you want to move. Press the left mouse button and keep it pressed. Drag the point to a new position.
  • Page 360 Kongsberg Simrad EM 300 / Base version To adjust the speed Select Options -> Parameters on the menu bar. Fill in the applicable data in the Parameters dialogue box. Close the box when all the parameters have been defined. The Parameters dialogue box is described on page 346.

  • Page 361: Command References

    Sound Speed Profile Editor 15.5 Command references Introduction This chapter describes the various commands used throughout the SSP Editor application. The following options are available on the main menu: • File • Edit • Options • Help Each of these menu options have a number of commands available on pull-down menus.
  • Page 362 Kongsberg Simrad EM 300 / Base version Open Editable This option is used to open a Sound Velocity profile file in order to make changes to it in the edit buffer. The Read SV Profile file selection box appears. This box provides a list of all the available Sound Velocity profile files in the profiles directory.
  • Page 363 Sound Speed Profile Editor Save As This option allows you to save the content of the editable buffer to another (new) file. This menu command brings up the Save As window which is basically an ordinary file selection box. Click in the Sound Speed Profile text input field, and enter the file name from the keyboard.

  • Page 364: Edit

    Kongsberg Simrad EM 300 / Base version Edit Overview The Edit option on the main menu bar contains two commands: • Move point • Add point • Remove point • Adjust velocity • Combine SV profiles • Copy SV profile These menu commands allow you to make changes to the profiles currently existing in one of the three edit buffers.
  • Page 365 Sound Speed Profile Editor The Parameters dialogue box and it’s options are described on page 346. → The procedure is presented on page 340. → Combine Sound Velocity Profiles This option is used to create a new profile in the editable profile buffer.

  • Page 366: Options

    Kongsberg Simrad EM 300 Base version Options Overview Options on the main menu bar contains the choices: • Parameters • Reset Windows • Show Profile Parameters Overview This dialogue box, shown below, is brought up by selecting the Options->Parameters menu command.
  • Page 367 Sound Speed Profile Editor Lock These settings make it possible to prevent the selection of profile points or whole profiles by edit commands. A lock may be set on any of the three profile buffers. A check button is provided for each edit buffer. A check-mark with green background indicates a locked buffer.
  • Page 368 Kongsberg Simrad EM 300 Base version Apply Press this button to implement the new parameter settings. The edit area is redrawn to reflect any changes in the options or parameter values. The minimum and maximum depths parameters are checked, and a warning will be issued if they are not accepted.
  • Page 369 Sound Speed Profile Editor Help This opens the online-help system. 160719...

  • Page 370: Technical References

    Kongsberg Simrad EM 300 / Base version 16 TECHNICAL REFERENCES 16.1 Introduction This chapter provides basic reference information useful to understand settings and parameters used throughout the EM 300 system. In order to understand some of the information, you may need to have a more technical background than the average EM 300 user.

  • Page 371: Technical Specifications

    Technical reference 16.2 Technical specifications Note Kongsberg Simrad is engaged in continuous developments of its products and reserves the right to alter specifications without prior notice. List of units and main subunits • Operator station - The Operator Station may contain a number of subunits and peripherals (for example storage units, printers and plotters).

  • Page 372: Physical Properties

    Kongsberg Simrad EM 300 Base version • Ethernet interface for input of sound speed profile data and output of all data normally logged to disk and/or tape Physical properties Transmit transducer Module length 371.5 mm Width 350 mm (add 130 mm for...

  • Page 373: Power Requirements

    Technical reference Power requirements Operational voltage and frequency The single phase supply must be protected with 16A slow- blow fuses. Transceiver Unit 115 or 230 Vac (+/- 10%), <500 W, 47 to 63 Hz Operator Station 100 to 240 Vac, < 300 W, 47 to 63 Hz Acceptable transients Short time (max 2 sec)
  • Page 374 Kongsberg Simrad EM 300 Base version Coverage sector Up to 150_ Transmit beam steering Stabilized for roll, pitch and Receive beam steering Stabilized for roll Depth range from transducers 10 to 5000 m Depth resolution 1 - 16 cm Pulse length, deep modes...

  • Page 375: Bottom Detection

    Technical reference 16.3 Bottom Detection Conventional techniques A single beam echo sounder obtains depth by measuring the time a sound pulse takes to propagate to the bottom and multiplying this time value by the mean speed of sound in the water column. Good accuracy depends on: •...

  • Page 376: Advanced Techniques

    Kongsberg Simrad EM 300 / Base version sidescan systems, an approximate measurement of depth has been achieved by using phase detection through an interferometric principle. By comparing the phase of the returned echo on two or more physically separated transducers, the angle of arrival may be estimated in addition to the range.

  • Page 377: Em 300 Solution

    Technical reference Amplitude detection method To achieve a valid curve fit to the angle of arrival time series, a minimum number of samples is required, so that the incidence angle or depth cannot be too small. Thus an amplitude-based method is required as a backup to the phase detection method. As noted earlier, at normal incidence the leading edge of the echo may be used, while at larger angles of incidence, the amplitude series across the beam is required.

  • Page 378: Error Sources

    Kongsberg Simrad EM 300 / Base version The first round of detections is performed independently in all beams. A filtering of the detections is then done to eliminate spurious detections due to sidelobe echos, echos from fish, noise, etc. The severity of this filtering is determined by menu input from you.

  • Page 379: Echo Sounder Errors

    However, provided that the signal-to-noise ratio is above 10 dB, the following equations have been found to model the depth and acrosstrack position errors of the Kongsberg Simrad multibeam echo sounders very well:   ...
  • Page 380 Kongsberg Simrad EM 300 / Base version Here, is the range sampling distance, Ψ is the acrosstrack ∆R beamwidth, and the indexes refer to amplitude and phase detections respectively. The first term in the above equations is due to range error and the second to angular error. The system will usually use phase detection for long echoes (oblique beams) and amplitude detection for short echoes (near-nadir beams).
  • Page 381 Technical reference Pitch errors Errors in pitch will cause depth and alongtrack errors given by: D∆p ∆z = ∆x = D∆p Heading errors Errors in heading will cause alongtrack errors ( ) and acrosstrack ∆x errors ( ) given by: ∆y ∆x = D∆h tan Ô...
  • Page 382 Kongsberg Simrad EM 300 / Base version A fixed offset in the sound speed sensor will always give a range error and, if beam electronic steering is used (in which case the beam pointing angle will be in error), also an angular error: ∆R = R∆c...
  • Page 383 Technical reference Sea surface related errors Temporal and position-dependent sound speed variations may be modelled as for sensor errors, except when the sound speed variation is at the surface, or more correctly, at the transducer depth. The resulting error then depends upon transducer configuration, or on how much electronic beam steering is applied.
  • Page 384 Kongsberg Simrad EM 300 / Base version Implications Note that with a horizontally mounted linear (and thus electronically steered) transducer the total error due to varying sound speed at the transducer depth is zero except for a small roll-dependent term. This is because there are two errors involved:...
  • Page 385 Technical reference Bottom-related errors It may sometimes not be practical to measure the sound speed profile all the way to the bottom and there will usually be an error in the necessary extension of the profile. Another type of bottom-related sound speed problem that can be significant in not too deep waters occurs when a layer near the bottom with significantly different sound speed than the layer above moves upwards or downwards with changing depth due to...
  • Page 386 Kongsberg Simrad EM 300 / Base version It may also be noted that an inherent limitation in ray bending calculations is that one is usually forced to assume that the sound speed changes only with depth and that any change with position is negligible, at least for a particular beam.
  • Page 387 Technical reference From 0° and to an incidence angle of about 10-25°, it can be judged from the literature that the backscattering strength to a good approximation varies linearly with angle. The angle at which the cross-over between the two regions takes place, in effect defining the sharpness of the normal incidence peak, is very dependent upon seabed material type.

  • Page 388: Technical Background On Echo Sounder Parameters

    Kongsberg Simrad EM 300 Base version 16.6 Technical background on echo sounder parameters The longer it takes for the sound pulse to return, the weaker will be the returning echo. To compensate for this, the received signal will be amplified to a varying degree depending on the time since the signal was emitted.

  • Page 389: The Vessel Coordinate System

    Technical reference 16.7 The vessel coordinate system A main function of the parameters required for system installation is to inform the system of the relative positions between the various sensors and the angular orientation of the sensors with respect to the vessel.
  • Page 390 Kongsberg Simrad EM 300 Base version Forward position is defined on the X-axis (refer to the illustration below). Locations further forward than the reference point are positive. (CD3514) Figure 125 Sensor locations (example) Downward position (Z) Downward position is defined on the Z-axis (refer to the illustration above).

  • Page 391: Timing

    Technical reference 16.8 Timing Introduction Time synchronization between the echo sounder, the motion sensors and the positioning system is vital in order to achieve the best possible accuracy. The required time synchronization accuracy is better than 5 ms for attitude with roll being the most critical parameter.
  • Page 392 Kongsberg Simrad EM 300 / Base version Internal clock An internal clock in the Transceiver Unit is used to time stamp all time critical data. It is a software clock with 1 millisecond resolution, and it is synchronized to an internal hardware counter.
  • Page 393 Technical reference The internal clock’s time and date is adjustable to that given by an external clock, the positioning system or the operator station. However, this is only possible if the system is not logging data. Adjustment of the internal clock during data logging is not recommended as it would cause loss of synchronization between depth and attitude data.
  • Page 394 Kongsberg Simrad EM 300 / Base version As for the attitude data, a time stamp is generated at the reception of the first byte of each position datagram, and an adjustable time delay may be applied to this time stamp. If the real variation in this...
  • Page 395 Technical reference The absolute setting of time in the echo sounder is usually not critical with respect to other sensors. However it would be advisable to synchronize the echo sounder to a 1 PPS signal if it is available, and not to reset the echo sounder clock except at the start of a survey.
  • Page 396 Kongsberg Simrad EM 300 / Base version 16.9 Sound speed formulas The echo sounder computes bottom depth, taking full account of the raybending caused by the variation of sound speed in the water column. The Sound speed profile is entered manually, automatically from a sound speed profile probe, from an external computer, or by a combination of these methods.
  • Page 397 Technical reference • For depths greater than 5000 m, a latitude correction should be applied:  c(Z, T, S) = c(0, T, S) + Z′(16.3 + Z(0.22 − 0.003Z T + 2 where: Z’ = Z(1 - 0.0026 cos2Ô) Ô is latitude in degrees T is temperature in _C S is salinity in ppt Z is depth in km...

  • Page 398: Absorption Coefficient

    Kongsberg Simrad EM 300 / Base version 16.10 Absorption coefficient The mean absorption coefficient of the water column is used in the gain setting in the receiver. The typical value is 5 to 6 dB/km. The absorption coefficient is important in determining the correct backscattering strength of the seabed used in the seabed imaging.
  • Page 399 Technical reference The absorption coefficient equation is from R. E. Francois and G. R. Garrison, ¨Sound absorption based on ocean measurements: Part II: Boric acid contribution and equation for total absorption,¨ J. of Acoust. Soc. Am. 72(6), Dec. 1982, p 1886. 160719 / /F...

  • Page 400: Main Index

    Kongsberg Simrad EM 300 / Base version 17 MAIN INDEX The next pages present the main index of this manual. 160719 / /F...
  • Page 401 Operation manual Depth to normal incidence, status, 100 Disk space, status, 104 Across, status, 102 AML Smart Probe, 154 Auto Logging Interval, 93 Echo sounder, Launchpad, 65 Auto Mode Actual Parameters, 100 Edit enable, 125 Enable auto restart, 72 Error sources Backup All files, 79 attitude sensors, 360 echo sounder errors, 359...
  • Page 402 Operation manual change password, 25 start button, 68 define position delay, 26 stop button, 68 define sensor locations, 25 Logging selections, status, 102 define sensor offsets, 27 Login, 8 define TRU interfaces, 27 log in, 8 Logout, 88 set the clock, 28 Longitude, status, 106 switch on power, 8 update software, 24...
  • Page 403 Operation manual Pinging off button, 68 start button, 68 Seabed Viewer, Purpose, 326 Pitch Sensor, offsets, 27 stabilization, 116 Sensor Audio Alarm, 94 status, 105 Sensor data, status, 105 Position delay, 26 Sensor inputs, status, 106 Position quality, status, 106 Sensors Power, switch, 8 launchpad field, 67...
  • Page 404 Operation manual Survey file, View, 84 Survey logfile, 84 Survey parameters, 84 Survey format to disk, status, 103 Survey logfile, view, 84 Survey name, 73 Survey parameters, view, 84 Survey Predefined Setups, 74 Window layout, 89 Survey Setup, procedure, 15 Workspace, 69 Swath width, status, 102 launchpad field, 69...
  • Page 405 Operation manual Blank page 160719 / /F...
  • Page 406 Operation manual Blank page 160719 / /F...
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