Reson SeaBat 7125 SV2 User manual

SeaBat 7125 SV2
High-Resolution Multibeam
Sonar System
OPERATOR’S MANUAL
Part Number 86000169
Version 3
July 2011

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SeaBat 7125 SV2 Operator‟s Manual
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Version 3
Notice
The information contained in this document is subject to change
without notice. RESON makes no warranty of any kind with regard to
this material, including (but not limited to) the implied warranties of
merchant liability and fitness for a particular purpose. RESON shall
not be liable for errors contained herein or for incidental or
consequential damages in connection with the furnishing,
performance, or use of this material.
Copyright
Statement
Copyright RESON A/S 2010. All rights reserved. Reproduction,
adaptation, or translation without prior written permission is
prohibited, as per the copyright laws of Denmark.
SeaBat 7125 SV2 Operator’s Manual written by:
RESON A/S
Fabriksvangen 35
3550 Slangerup
Telephone: [phone]
Facsimile: [phone]
Web: http://www.reson.com
E-mail: [email protected]m
[email protected]
Copyright
Release
No part of this manual may be copied or distributed, transmitted,
transcribed, stored in a retrieval system, or translated into any
human or machine readable language, in any form or by any means
for disclosure to third parties without the express written consent of
RESON A/S.
Version
July 2011
Version 3
RESON strives to maintain up-to-date information and may, as
necessary, review and revise this manual. If the information
contained in this manual is unclear, please contact your nearest
RESON office for clarification.
Maintenance
Release
Release FP2
This manual is consistent with the indicated software and firmware
maintenance release.
Electronic File
Version
This manual is available from RESON in the Adobe® Acrobat®
Portable Document Format (PDF). The selected PDF process
preserves the interactive index and cross-reference features of the
original Microsoft Word document.

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TABLE OF CONTENTS
1Introduction................................................................................1
1.1 System Overview.............................................................................................1
1.2 System Architecture.........................................................................................2
1.3 System Operation............................................................................................2
1.4 System Features..............................................................................................3
1.5 Typical Applications.........................................................................................5
2Safety Precautions.....................................................................6
2.1 Operator Safety ...............................................................................................6
2.2 Equipment Safety ............................................................................................6
2.2.1 Safe Handling ..........................................................................................6
2.2.2 Cleaning and Maintenance.......................................................................7
2.3 Corrosion Avoidance .....................................................................................10
2.4 Electrical Isolation..........................................................................................10
2.5 Exposure to Sunlight......................................................................................11
2.6 Safe Disposal of Waste (WEEE Directive).....................................................11
2.7 CE Marking....................................................................................................11
3System Startup and Shutdown...............................................12
3.1 Chapter Overview..........................................................................................12
3.2 System Startup Instructions...........................................................................12
3.3 Starting the 7k Control Center and Sonar ......................................................13
3.4 System Shutdown Instructions.......................................................................15
3.5 Installing a License........................................................................................16
4System Configuration..............................................................17
4.1 Chapter Overview..........................................................................................17
4.2 Configuration Menu Options..........................................................................18
4.2.1 Data Display & Format...........................................................................18
4.2.2 UDP Broadcasting..................................................................................19
4.2.3 Hardware Configuration .........................................................................25
4.2.4 Advanced Ping Settings.........................................................................27
4.2.5 Triggering...............................................................................................27
4.2.6 Dual Head..............................................................................................29
4.2.7 Motion....................................................................................................30

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4.2.8 Load.......................................................................................................32
4.2.9 Save Current..........................................................................................33
4.2.10 Edit Auto Pilot Settings...........................................................................34
4.3 Frequency Switch (System Menu) .................................................................35
4.4 Channel Normalization...................................................................................36
4.5 I/O Module Configuration...............................................................................37
4.5.1 Device Types.........................................................................................38
4.5.2 Adding a Device.....................................................................................39
4.5.3 I/O Module Setup Check........................................................................40
4.6 Remote Operation .........................................................................................46
4.7 Folder Management.......................................................................................46
4.7.1 Sharing a Folder on a Network...............................................................46
4.7.2 Verifying or Changing the Computer Name and/or Workgroup Name ....51
5System Operation....................................................................56
5.1 Chapter Overview..........................................................................................56
5.2 User Interface................................................................................................57
5.3 Primary Display Tab ......................................................................................58
5.3.1 Sonar Image ..........................................................................................60
5.3.2 A-Scan Display ......................................................................................61
5.3.3 Event Messages ....................................................................................64
5.3.4 1PPS Input Indicator..............................................................................65
5.3.5 Normalization Indicator ..........................................................................65
5.3.6 Freeze the Sonar Image.........................................................................66
5.3.7 Maximize the Sonar Image.....................................................................66
5.3.8 Change Modes.......................................................................................66
5.3.9 Identify Beam Track, Depth, and Range (or Channel and Sample) ........66
5.3.10 Automatic Update of Auto Pilot Settings.................................................67
5.4 Motion Tab.....................................................................................................67
5.5 Snippets and Side Scan Tabs........................................................................68
5.6 Built-In Test Environment (BITE) ...................................................................70
5.6.1 BITE.......................................................................................................70
5.6.2 BITE Tabs..............................................................................................71
5.7 Sonar Control Tabs........................................................................................75
5.7.1 Main Sonar Settings...............................................................................75
5.7.2 Detection Settings..................................................................................78

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5.7.3 Ocean Settings ......................................................................................80
5.7.4 Primary Display Settings........................................................................81
5.7.5 Data Recording......................................................................................83
5.7.6 Screen Recording (Video Recording).....................................................85
5.7.7 I/O Module Setup...................................................................................86
5.7.8 Data Playback........................................................................................86
5.8 7k Center Console Window ...........................................................................91
5.9 Help Menu.....................................................................................................92
5.9.1 Licensed Features..................................................................................92
5.9.2 Software Release Information................................................................93
6Active Sonar Usage.................................................................94
6.1 Chapter Overview..........................................................................................94
6.2 Enhancing the Sonar Image ..........................................................................95
6.2.1 Pulse Length and Image Resolution.......................................................95
6.2.2 Transmit Power OFF..............................................................................95
6.2.3 Lower Ping Rate ....................................................................................95
6.2.4 Receiver Gain........................................................................................96
6.2.5 Vari-Swath .............................................................................................96
6.2.6 Correct Range Setting..........................................................................100
6.2.7 Minimum Beams, Intermediate, and Best Coverage Modes.................101
6.2.8 Use of Gates........................................................................................101
6.3 System Efficiency ........................................................................................104
6.3.1 Auto Pilot .............................................................................................104
6.3.2 Roll Stabilization ..................................................................................105
6.3.3 Head Tilt ..............................................................................................106
6.4 Use of Displays............................................................................................108
6.4.1 Wedge versus B-Scan Display.............................................................108
6.4.2 A-Scan, Phase and Magnitude Displays ..............................................108
6.5 Water Column Data Recording....................................................................108
6.5.1 External RAID......................................................................................109
6.5.2 Local Recording...................................................................................109
6.6 Compensation for Environmental Conditions...............................................110
6.6.1 Loss of Sound by Absorption ...............................................................110
6.6.2 Loss of Sound by Spreading................................................................111
6.6.3 Sound Velocity.....................................................................................112

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6.7 Limitations ...................................................................................................113
6.7.1 Cavitation.............................................................................................113
6.7.2 Machinery Noise ..................................................................................113
6.7.3 Interference from Other Sonar Systems...............................................114
6.7.4 Speed ..................................................................................................114
6.7.5 Air Bubbles...........................................................................................114
6.7.6 Environment.........................................................................................115
7System Performance and Data Types..................................116
7.1 Beam Modes ...............................................................................................117
7.1.1 Minimum Beams ..................................................................................117
7.1.2 Intermediate.........................................................................................117
7.1.3 Best Coverage.....................................................................................117
7.1.4 Flex Mode............................................................................................118
7.2 Data Types..................................................................................................118
7.2.1 Bathymetry Data ..................................................................................118
7.2.2 Side-Scan Data....................................................................................119
7.2.3 Snippets Data ......................................................................................120
7.3 Best Coverage and Intermediate Modes......................................................121
7.4 Quality.........................................................................................................123
7.4.1 Brightness Test....................................................................................123
7.4.2 Colinearity Test....................................................................................123
7.4.3 Quality Filter.........................................................................................124
7.5 Uncertainty Estimation.................................................................................124
7.6 Ping Rate Table...........................................................................................126
Appendix A Troubleshooting ..................................................127
A.1 System Warnings and Alarm Messages ......................................................127
A.2 Responding to Errors and Alarms................................................................127
A.3 Alarm Messages..........................................................................................128
A.3.1 General System Startup Alarms...........................................................129
A.3.2 PCI Card Related (ADMXRC) Alarms ..................................................130
A.3.3 Data Reading Alarms...........................................................................131
A.3.4 System Resource Alarms.....................................................................131
A.3.5 Input Signal (Timing and Triggers) Alarms ...........................................131
A.3.6 Calibration Alarms................................................................................131
A.4 Warning Messages......................................................................................132

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A.4.1 Configuration Warnings........................................................................132
A.4.2 Startup Warnings .................................................................................133
A.4.3 Data Processing Warnings...................................................................133
A.4.4 Data Recording Warnings....................................................................133
A.4.5 BITE Data Warnings ............................................................................134
A.4.6 Input Signal Warnings..........................................................................134
A.4.7 System Stability Warnings....................................................................134
A.4.8 Data Subscription Warnings.................................................................135
A.4.9 Network Components Warnings...........................................................135
A.4.10 External Trigger Warnings....................................................................135
A.5 Alarm Messages –Master List in Alphabetical Order...................................136
A.6 Warning Messages –Master List in Alphabetical Order...............................142
Appendix B SeaBat 7125 Data Sheet......................................147
B.1 Ultra High-Resolution Multibeam Echosounder............................................147
B.2 SeaBat 7125 System Performance..............................................................148
B.3 SeaBat 7125 Physical Specifications...........................................................148
Appendix C Installation Instructions ......................................149
C.1 Components Checklist.................................................................................149
C.2 Installation Checklist....................................................................................150
C.3 Dry-End Installation .....................................................................................151
C.3.1 Transceiver Installation ........................................................................151
C.3.2 Transceiver Mounting...........................................................................153
C.3.3 Transceiver Cable Connections ...........................................................154
C.3.4 Monitor Connections............................................................................156
C.3.5 Simple Monitor Setup...........................................................................157
C.3.6 Advanced Monitor Setup (Cloning Monitors)........................................158
C.4 Auxiliary Sensors.........................................................................................163
C.4.1 Sound Velocity Input............................................................................163
C.4.2 Motion Sensor Input.............................................................................164
C.4.3 Time Input............................................................................................164
C.4.4 Standard Serial Ports...........................................................................165
C.4.5 RJ-45 to D-SUB9 Adaptor....................................................................165
C.5 SeaBat 7125 SV2 Cables............................................................................166
C.6 Wet-End Installation.....................................................................................168
C.6.1 EM 7216 Receiver Unit ........................................................................168

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C.6.2 TC 2181 Projector Unit.........................................................................169
C.6.3 Wet-End Mounting ...............................................................................170
C.6.4 Sonar Head Assembly Orientation.......................................................170
C.6.5 Sounding Reference Point ...................................................................171
C.6.6 Wet-End Cable Connections................................................................171
C.7 System Check .............................................................................................172
Appendix D Reference Documentation ..................................173
D.1 SeaBat 7125 SV2 Documentation ...............................................................173
D.2 SeaBat 7125 SV2 Design Documents .........................................................174
Appendix E SeaBat 7125 SV2 System Options......................185
E.1 Extended Warranty Contract........................................................................185
E.2 External RAID Drive.....................................................................................185
E.3 Mounting Bracket.........................................................................................186
E.4 PDS2000 Data Acquisition Software............................................................186
E.5 SeaBat Cables.............................................................................................186
E.6 Service and Support Agreements................................................................187
E.7 Sound Velocity Probe..................................................................................187
E.8 System Integration and Training..................................................................188
Appendix F Available SeaBat 7125 Configurations...............189
F.1 Configurations .............................................................................................189
F.1.1 7125 SV Configuration.........................................................................189
F.1.2 7125 ROV Configuration......................................................................189
F.1.3 7125 AUV Configuration.......................................................................189
F.2 Feature Packages........................................................................................190
Appendix G Warranty Information ..........................................191
G.1 One Year Limited Warranty .........................................................................191
G.2 Exclusions ...................................................................................................191
G.3 Warranty Limitations....................................................................................191
G.4 Servicing During Warranty Period................................................................192
G.5 Equipment Return Procedure.......................................................................192
G.6 Service ........................................................................................................192
Appendix H Glossary of Terms...............................................193

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LIST OF FIGURES
Figure 1: SeaBat 7125 SV2 Sonar System......................................................................1
Figure 2: SeaBat 7125 SV2 System Configuration..........................................................2
Figure 3: Transceiver Filter Location...............................................................................9
Figure 4: Example of Trigger Output: Delay = 0, Pulse Width = 1..................................28
Figure 5: Sample of I/O Module Setup Tab ...................................................................38
Figure 6: 7k I/O Module Window...................................................................................41
Figure 7: User Interface with Display and Control Areas ...............................................57
Figure 8: Primary Display Tab.......................................................................................58
Figure 9: A-Scan and Sonar Wedge Display.................................................................60
Figure 10: B-Scan Display.............................................................................................60
Figure 11: Motion Tab...................................................................................................67
Figure 12: Typical Side-Scan Display............................................................................69
Figure 13: BITE Tab......................................................................................................70
Figure 14: BITE Status Tab...........................................................................................71
Figure 15: BITE –Link Control Tab...............................................................................72
Figure 16: BITE –Receiver Tab....................................................................................72
Figure 17: BITE –Projector Tab....................................................................................73
Figure 18: BITE –7kCenter Tab....................................................................................74
Figure 19: Sample of Main Sonar Settings Tab.............................................................75
Figure 20: Range Setting Diagrams ..............................................................................75
Figure 21: Sample of Detection Settings Tab................................................................78
Figure 22: Sample of Ocean Menu Tab.........................................................................80
Figure 23: Sample of Primary Display Settings Tab ......................................................81
Figure 24: Sample of Data Recording Tab ....................................................................83
Figure 25 Sample of Screen Recording Tab..................................................................85
Figure 26: Sample of Data Playback Tab......................................................................86
Figure 27: 7k Center Console Window..........................................................................92
Figure 28: Licensed Features Information (Example Only)............................................92
Figure 29: Software Release Information (Example Only).............................................93
Figure 30: Example of Reduced Swath Width...............................................................97
Figure 31: Horizontal Swath Steering............................................................................98
Figure 32: Mouse Controls for Swath and Flex Mode Sector Widths, and Steering.......99

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Figure 33: Range Setting –Too Long..........................................................................100
Figure 34: Range Setting –Too Short.........................................................................100
Figure 35: Range Setting –The Exception..................................................................101
Figure 36: Depth Gates, With No Roll .........................................................................102
Figure 37: Depth Gates, With Roll...............................................................................102
Figure 38: Depth Gates, With Roll and Motion Sensor Input........................................103
Figure 39: Depth Gate Tilt...........................................................................................103
Figure 40: Swath under Zero Roll Conditions..............................................................105
Figure 41: Laterally Displaced Swaths under Roll Conditions......................................105
Figure 42: Swath under Roll Stabilization....................................................................106
Figure 43: Head Tilt Functionality................................................................................107
Figure 44: Head Tilt for Harbor Inspection...................................................................107
Figure 45: Head Tilt for Pipe Inspection ......................................................................108
Figure 46: Water Column Data Recording to an External RAID...................................109
Figure 47: Water Column Data Recording Locally.......................................................109
Figure 48: Acoustic Absorption Reference ..................................................................111
Figure 49: Typical Sound Velocity Values ...................................................................112
Figure 50: Graphic Illustration of Flex Mode................................................................118
Figure 51: Graphic Illustration of Snippets Data ..........................................................120
Figure 52: Beam Density.............................................................................................121
Figure 53: Beam Spacing vs. Beam Angle..................................................................121
Figure 54: Beam Spacing............................................................................................122
Figure 55: Across-Track Sounding Location on a Flat Bottom.....................................122
Figure 56: Brightness Test..........................................................................................123
Figure 57: Colinearity Flags.........................................................................................124
Figure 58: Transceiver Unit.........................................................................................151
Figure 59: Transceiver Table Mounting.......................................................................153
Figure 60: Transceiver Cable Connections..................................................................154
Figure 61: Transceiver Diagnostic LEDs .....................................................................155
Figure 62: SVP, Motion, and Time Standard Connections...........................................163
Figure 63: RJ-45 to D-SUB9 Adaptor..........................................................................165
Figure 64: SeaBat 7125 SV2 System Cables..............................................................166
Figure 65: Bend Radius...............................................................................................167
Figure 66: EM 7216 Receiver Unit...............................................................................168
Figure 67: TC 2181 Projector Unit...............................................................................169

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Figure 68: System Documentation Link (Example Only)..............................................173
Figure 69: Receiver, EM 7216 Outline Dimension.......................................................175
Figure 70: Projector, TC 2181 Outline Dimension .......................................................176
Figure 71: Cable Assembly, Transceiver to Receiver..................................................177
Figure 72: Cable Assembly, Transceiver to Dual-Frequency Transmitter....................178
Figure 73: 7125 Mounting Bracket Installation (optional).............................................179
Figure 74: Cable Assembly, Transceiver to SVP 70 (optional) ....................................180
Figure 75: Cable Assembly, Transceiver to SVP 71 (optional) ....................................181
Figure 76: Sonar Reference Point Definition, sheet 1..................................................182
Figure 77: Sonar Reference Point Definition, sheet 2..................................................183
Figure 78: Sonar Reference Point Definition, sheet 3..................................................184
Figure 79: RAID Hard Disk Array.................................................................................185

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LIST OF TABLES
Table 1: TVG Formula...................................................................................................96
Table 2: Incorrect Range Settings –Examples and Solutions .....................................100
Table 3: Ping Rate Table.............................................................................................126
Table 4: SeaBat 7125 System Performance................................................................148
Table 5: SeaBat 7125 SV2 Components.....................................................................149
Table 6: Transceiver Technical Specifications.............................................................151
Table 7: DVI and Analog Monitor Connections............................................................156
Table 8: Display Port Connections..............................................................................156
Table 9: Transceiver Port “SVP/Com3” .......................................................................163
Table 10: Transceiver Port “Motion/Com4”..................................................................164
Table 11: Transceiver Port “Time/Com10”...................................................................164
Table 12: Transceiver Ports “Com5”, “Com6”, “Com7”, “Com8”, “Com9”.....................165
Table 13: RJ-45 to DB9 Adaptor .................................................................................165
Table 14: EM 7216 Receiver Unit Technical Specifications.........................................168
Table 15: TC 2181 Projector Unit Technical Specifications.........................................169
Table 16: RAID Hard Disk Array Technical Specifications...........................................185
Table 17: SVP Technical Specifications......................................................................187
Table 18: Available Configurations..............................................................................189
Table 19: SeaBat 7125 Feature Packages..................................................................190

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PREFACE
How to Use This Manual
This manual is designed to accommodate both the first time user, who needs detailed
instructions, and the experienced technician, who only requires a reference tool. It
provides detailed procedures for the correct installation, operation, and maintenance of
your RESON system.
Read this manual thoroughly and follow the steps provided to maintain optimal safety
standards and to obtain the best system performance.
Standards of Measurement
All physical measurements represented in this document are based on the metric
system. All temperatures are represented in degrees Celsius.
Document Conventions
The following information will make it easier for the reader to interpret the text presented
in this document.
Document Conventions
Convention
Definition
Hyperlink
Indicates a hyperlinked cross-reference. Click the word to be taken
to the specified reference point.
Numbered list
Indicates stepwise instructions to be followed in a particular order.
Bulleted list
Indicates items of a list without any particular order.
Notes, Cautions, and Warnings
Notes, Cautions, and Warnings are included in this text to provide valuable information
and to help the operator prevent damage to the sonar or to personnel.
Notes, Cautions, and Warnings will be shown in the following format:
NOTE
This is a Note. Notes provide explanatory information that may be useful to the
operator, but is not necessarily vital to the operation of your RESON system.
CAUTION
This is a Caution. Cautions provide important information regarding your RESON
system. Disregarding information provided in a Caution box may result in accidental
misuse or damage to your RESON system.

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WARNING!
This is a Warning. Warnings provide important information regarding your RESON
system. Disregarding information provided in a Warning box may prove harmful to
personnel working with or near the system.
Chapter Arrangement
All RESON manuals are designed with the same basic structure. The following chapters
are included in this document:
Introduction provides a short summary of the SeaBat 7125 SV2 sonar
system, including an overview of the architecture and the main features.
Safety Precautions provides important safety information about the SeaBat
7125 SV2 sonar system.
System Startup and Shutdown provides detailed information about how to
start and shut down the SeaBat 7125 SV2 sonar system.
System Configuration provides detailed information about how to configure
the SeaBat 7125 SV2 sonar system.
System Operation provides detailed information about the user interface and
operation of the SeaBat 7125 SV2 sonar system.
Active Sonar Usage provides detailed information about the practical usage
of the SeaBat 7125 SV2 sonar system.
System Performance and Data Types provides information about the types
of data produced by the SeaBat 7125 SV2 sonar system.
In addition to the above chapters, these appendixes have been included for reference:
Appendix A: Troubleshooting
Appendix B:SeaBat 7125 Data Sheet
Appendix C: Installation Instructions
Appendix D:Reference Documentation
Appendix E:SeaBat 7125 SV2 System Options
Appendix F:Available SeaBat 7125 Configurations
Appendix G:Warranty Information
Appendix H:Glossary of Terms
If you require additional information or need clarification of any part of this document,
please contact RESON Customer Support for assistance at [email protected].

INTRODUCTION
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1 INTRODUCTION
1.1 System Overview
The SeaBat 7125 SV2 (for Surface Vessel) is a high-resolution multibeam sonar system
that measures relative water depths over a 140° (or 165°) wide swath perpendicular to
the vessel's track.
The SeaBat 7125 SV2 is a dual-frequency system designed for convenient installation
on small surface vessels. The dual-frequency system provides high-resolution
functionality with the 400kHz frequency and long-range functionality with the 200kHz
frequency.
Figure 1: SeaBat 7125 SV2 Sonar System
For available configurations, see Appendix F Available SeaBat 7125 Configurations.
For available system options, see Appendix E SeaBat 7125 SV2 System Options.
For available feature packages, see Appendix F.2 Feature Packages.

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1.2 System Architecture
The SeaBat 7125 SV2 multibeam sonar system consists of a combined sonar interface
and processing unit, known as the transceiver, as well as a receiver unit and a projector
unit, both with dual-frequency operation. 25 meter cables connect the receiver and
projector units to the transceiver. User displays and system control originate within the
transceiver.
For details on the various system components, see Appendix C Installation Instructions.
EM 7216
Receiver Unit TC 2181 Projector Unit
Monitor
Keyboard, mouse
WET END
DRY END
Transceiver
Optional PDS2000
(incl. 2 additional monitors)
Figure 2: SeaBat 7125 SV2 System Configuration
1
1.3 System Operation
The projector unit of the sonar head assembly transmits a pulse of acoustic energy,
which travels through the water and is reflected by the seafloor or any objects in its path.
The reflected signal is received by the receiver unit of the sonar head assembly,
digitized by internal electronics, and sent to the topside transceiver for beamforming and
1
It is possible to connect four monitors to the transceiver.

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processing. The transceiver generates the video displayed on the monitor and formats a
digital output to be used by a peripheral bathymetric data processing system (or the
optional PDS2000 DAC preinstalled on the transceiver) while functioning as the control
interface between the operator and the sonar system.
1.4 System Features
The main features of the SeaBat 7125 SV2 system are summarized below. Depending
on the feature package purchased
2
, all features may not be available (see appendix F.2
Feature Packages).
Resolution: Dynamic, focused beamforming maintains ultra-high resolution,
even at short ranges. A receiver sample rate of 34kHz provides
unprecedented range resolution and complements the narrow beam, thus
providing the user with ultimate data quality and resolution.
Fast update: The entire 140° (or 165°) swath is illuminated with a single
transmission at an update rate of up to 50Hz (range selection dependent),
maintaining 100% bottom coverage, even at high speed.
Depth rating: The SeaBat 7125 SV2 is depth-rated to 50 meters.
Data output: The SeaBat 7125 SV2 exports the standard hydrographic
records of bathymetry, side-scan, and snippets as well as water column data
and other data for more scientific applications.
Beamforming: The transceiver performs initial signal processing, a
combination of time delay and phase rotation beamforming.
Bottom detection: The special bottom detection algorithm uses a
combination of center-of-energy and phase-zero crossing algorithms to detect
the bottom in each individual beam with the highest possible accuracy.
Uncertainty output: Uncertainty is computed for each sounding and
presented graphically on various UI (user interface) displays.
Variable swath coverage: This feature gives the operator control of the
swath coverage. It includes swath width settings ranging from 45º to 140º (or
165º) in increments of 5º as well as a choice of beam density mode.
Steerable swath: This feature allows swath to be steered electronically.
Head tilt: This feature makes it possible to operate with a physically rotated
sonar head, which allows for very flexible and specialized applications of the
SeaBat 7125 SV2.
XYZ offsets:This feature makes it possible to take into account offsets
between the projector and receiver, when these two separate units are
mounted remotely from each other. This way bathymetric accuracy is
maintained.
2
Feature Packages include Standard and Efficiency.

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Auto pilot: This feature allows for automatic update of certain sonar settings.
When Autopilot mode is initiated, the SeaBat analyzes bottom detection data
to determine the average bottom depth and maximum usable swath angle,
then optimizes the sonar settings accordingly consistent with a user-
configurable look-up table.
Operator selectable operating mode: The choice of five different beam
modes allows the operator to select a beam mode appropriate to the
application thereby optimizing sonar operation. Wide mode yields a swath of
165º, while the other four modes yield a swath of 140º. In addition, Flex mode
provides settings for alternative beam distribution.
Beam distribution: The SeaBat 7125 SV2 offers the operator a choice
between Minimum Beams (equiangular spacing), Intermediate, and Best
Coverage (equidistant spacing) at both the 200kHz and 400kHz frequency. All
options are dynamically focused.
On the fly frequency change: The SeaBat 7125 SV2 dual-frequency system
may be operated at either frequency without the need to restart the 7k Center.
On the fly beam mode selection: Choice of beam mode (spacing and
number of beams) can be done without restarting the 7k Center.
Real-time QC display: The SeaBat 7125 SV2 generates a real-time display
with an intensity image on a high resolution 19-inch LCD monitor. Overlaid on
this intensity image is the bottom detection display, giving the operator an
excellent QC (quality control) tool.
Hardware sync pulse out: A TTL pulse (synchronous with the transmit pulse)
is available from the transceiver.
1PPS pulse handling and time stamping: Data time stamping is referenced
to an incoming 1PPS and associated time message.
External trigger: The system may be triggered using a standard 7k Center
software remote command or by a TTL incoming trigger pulse.
Adaptive gating: Three different gate settings are available for application to
the bottom detection process: No Gates, Absolute Gates, and Adaptive Gates.
Beam data recording: The SeaBat 7125 SV2 is capable of producing a
stream of beam data that is operator configurable and may be written to either
the transceiver local hard drive or an optional external RAID hard disk array.
Data logging software controls recording, playback, and data storage
functions.
Built-In Test Environment (BITE): BITE is an integral part of the transceiver,
monitoring the status of internal subsystems and the wet-end units.