Edgetech 2050-DSS User manual

EdgeTech
4 Little Brook Road
West Wareham, MA 02576
Tel: [phone]
Fax: [phone]
www.EdgeTech.com
2050-DSS SIDE SCAN AND SUB-BOTTOM SYSTEM
USER HARDWARE MANUAL
0024048_REV_A 5/25/2021

ii
2050-DSS Side Scan and Sub-Bottom System 0024048_REV_A
The information, figures, and specifications in this manual are proprietary. They are issued in strict
confidence on condition that they not be copied, reprinted, or disclosed to a third party, either wholly or
in part, without the prior, written consent of EdgeTech. Any reproduction of EdgeTech supplied software
or file sharing is strictly prohibited.
Copyright © 2021 EdgeTech. All rights reserved.

iii
ATTENTION – READ THIS FIRST!
All personnel involved with the installation, operation, or maintenance of the equipment described in this
manual should read and understand the warnings and cautions provided below.
CAUTION!This equipment contains devices that are extremely sensitive
to static electricity. Therefore, extreme care should be taken when
handling them. Normal handling precautions involve the use of anti-static
protection materials and grounding straps for personnel.
WARNING!High voltage may be present in all parts of the system.
Therefore, use caution when the electronics are removed from their
containers for servicing.
CAUTION!Operation with improper line voltage may cause serious
damage to the equipment. Always ensure that the proper line voltage is
used.
Warnings, Cautions, and Notes
Where applicable, warnings, cautions, and notes are provided in this manual as follows:
WARNING! Identifies a potential hazard that could cause injury or death.
CAUTION! Identifies a potential hazard that could damage equipment or
data.
NOTE: Recommendations or general information that is particular to the
material being presented.

iv
2050-DSS Side Scan and Sub-Bottom System 0024048_REV_A
HARDWARE VARIATIONS AND COMPATIBILITY
The 2050-DSS Side Scan and Sub-Bottom System contains both standard and proprietary hardware. At
times, EdgeTech may change the standard components due to their availability or performance
improvements. Although the component manufacturers and their models and styles may change from
unit to unit, replacement parts will generally be interchangeable.
EdgeTech will make every effort to see that replacement components are interchangeable and use the
same software drivers (if applicable). At times, however, direct replacements may not exist. When this
happens, EdgeTech will provide the necessary drivers with the replacement part, if applicable.
EdgeTech may also change certain hardware per customer requirements. Therefore, portions of this
manual, such as parts lists and test features, are subject to change. These sections should be used for
reference only. When changes are made that affect system operation, they will be explicitly noted. Also,
some options and features may not be active in the customer’s unit at the time of delivery. Upgrades will
be made available when these features are implemented.
Contact EDGETECH CUSTOMER SERVICE with any questions relating to compatibility.

v
ABOUT THIS DOCUMENT
We, the employees at EdgeTech, would like to thank you for purchasing a 2050-DSS Side Scan and Sub-
Bottom System. At EdgeTech, our policy is to provide high-quality, cost-effective products and support
services that meet or exceed your requirements. We also strive to deliver them on time and to look for
ways to improve them continuously. We take pride in the products we manufacture and want you to be
entirely satisfied with your equipment.
Purpose of this Manual
The purpose of this manual is to provide the user with information on the setup and use of EdgeTech’s
2050-DSS Side Scan and Sub-Bottom System. Although this manual encompasses the latest operational
features of the 2050-DSS Side Scan and Sub-Bottom System, some features may be periodically upgraded.
Therefore, the information in this manual is subject to change and should be used for reference only.
Liability
EdgeTech has made every effort to document the 2050-DSS Side Scan and Sub-Bottom System in this
manual accurately and completely. However, EdgeTech assumes no liability for errors or any damages
resulting from the use of this manual or the equipment it documents. EdgeTech reserves the right to
upgrade features of this equipment and to make changes to this manual without notice at any time.
Revision History
REVISION
DESCRIPTION
DATE
APPROVAL
A
Release to Customers
5/25/2021
DWF

vi
2050-DSS Side Scan and Sub-Bottom System 0024048_REV_A
WARRANTY STATEMENT
All equipment manufactured by EdgeTech is warranted against defective components and workmanship
for a period of one year after shipment. Warranty repair will be done by EdgeTech free of charge.
Shipping costs are to be borne by the customer. Malfunction due to improper use is not covered in the
warranty, and EdgeTech disclaims any liability for consequential damage resulting from defects in the
performance of the equipment. No product is warranted as being fit for a particular purpose, and there is
no warranty of merchantability. This warranty applies only if:
i. The items are used solely under the operating conditions and in the manner recommended in the
Seller's instruction manual, specifications, or other literature.
ii. The items have not been misused or abused in any manner, nor have repairs been attempted
thereon without the approval of EdgeTech Customer Service.
iii. Written notice of the failure within the warranty period is forwarded to the Seller, and the
directions received for properly identifying items returned under warranty are followed.
iv. The return notice authorizes the Seller to examine and disassemble returned products to the
extent Seller deems necessary to ascertain the cause for failure.
The warranties expressed herein are exclusive. There are no other warranties, either expressed or implied,
beyond those set forth herein. The Seller does not assume any other obligation or liability in connection
with the sale or use of said products. Any product or service repaired under this warranty shall only be
warranted for the remaining portion of the original warranty period.
Equipment not manufactured by EdgeTech is supported only to the extent of the original manufacturer's
warranties.
CAUTION! If your product is a portable topside, never attempt to ship it
in its Storm CaseTM alone. Shipping portable topsides without an exterior
shipping crate will void the warranty.

vii
SOFTWARE SERVICE OVERVIEW
EdgeTech provides software services free of charge. This software agreement does not address customer-
specified modifications or enhancements. These services may be ordered separately. Furthermore,
EdgeTech software upgrades are meant for the sole use of EdgeTech customers. Any reproduction of
EdgeTech-supplied software or file sharing is strictly prohibited.
Software Updates and Enhancements
EdgeTech customers can download new software releases with all modifications and enhancements from
the EDGETECH WEBSITE. Major software issues, should they occur, will be reported directly to the customer.
New software releases consist of the following:
•Software enhancements that are not on the price list
•Software fixes and changes
•Product integration
•Documentation updates to online help
•Tests for compatibility with other modules
Software patches consist of software that has undergone the following:
•Minor software enhancements
•Software fixes and changes
EdgeTech customers are entitled to contact EDGETECH CUSTOMER SERVICE by telephone, facsimile, or e-mail
to report a difficulty, discuss a problem, or receive advice on the best way to perform a task. When
contacted, EdgeTech Customer Service will do the following:
•Respond within 24 hours via Telephone, Facsimile, and E-mail Support
•Immediately attend to serious problems affecting operations
•Attempt to find an immediate workaround

viii
2050-DSS Side Scan and Sub-Bottom System 0024048_REV_A
RETURNED MATERIAL AUTHORIZATION
Prior to returning any equipment to EdgeTech, a Returned Material
Authorization (RMA) Number must be obtained from CUSTOMER SERVICE.
RMA Purpose
The RMA Number identifies returned equipment when it arrives at our receiving dock and enables tracking
while at our facility. Refer to the RMA number on all documentation and correspondences.
All returned materials must be shipped prepaid. Freight collect shipments will not be accepted. All
equipment should be adequately insured for shipping, but equipment belonging to EdgeTech must be
insured for full value.
If there is more than one item per consignment, include a packing with the shipment. An invoice can
double as a packing slip only when the contents are clearly numbered and identified on the invoice.
CAUTION! Never attempt to ship a Portable Topside in its Storm CaseTM
alone. Although rugged, these cases are not intended to be used as
shipping containers, and the delicate internal components could be
damaged. Shipping in this manner will void any warranties.
NOTE: All shipping charges shall be the customer's responsibility, unless
under warranty, as EdgeTech will pay for return shipping.
NOTE: For International Shipments valued over $1000, the following
Shipper's oath must be sent with the invoice.
Shipper’s Oath:
"I, ______________________________, declare that the articles herein specified are the growth,
produce, or manufacture of the United States; that they were exported from the
United States from the port of _____________________, on or about _______________; that they
are returned without having been advanced in value or improved in condition by any
process of manufacture or any other means; and that no drawback, or allowance has
been paid or admitted hereof."
Signed ______________________________

ix
CUSTOMER SERVICE
Customer service personnel at EdgeTech are always eager to hear from users of our products. Your
feedback is welcome and a valuable source of information that we use to improve these products
continually. Therefore, we encourage you to contact EdgeTech Customer Service to offer any suggestions
or to request technical support:
NOTE: Please have your system Model and Serial Number available when
contacting Customer Service.
E-mail: [email protected]
Mail: 4 Little Brook Road
West Wareham, MA 02576
Telephone: [phone]
Facsimile: [phone]
24-Hour Emergency
Technical Support Line: [phone]
For more information, please go to WWW.EDGETECH.COM.

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2050-DSS Side Scan and Sub-Bottom System 0024048_REV_A
COMPANY BACKGROUND
EdgeTech (formerly EG&G Marine Instruments) traces its history in Underwater Data Acquisition and
Processing back to 1966. EdgeTech has designed, developed, and manufactured products, instruments,
and systems — for the acquisition of underwater data, including marine, estuarine, and coastal
applications — for over 50 years.
EdgeTech responds to the needs of the scientific, naval, and offshore communities by providing industry-
leading equipment — such as sub-bottom profilers, side scan sonar, acoustic releases, USBL positioning
systems, and bathymetric systems — that have become standards in the industry.
EdgeTech consistently anticipates and responds to future needs with an active Research and Development
Program. Current efforts are focused on adapting new cutting-edge acoustic technology.

xi
TABLE OF CONTENTS
ATTENTION – READ THIS FIRST! .......................................................................................................... iii
Warnings, Cautions, and Notes................................................................................................................ iii
HARDWARE VARIATIONS AND COMPATIBILITY ................................................................................... iv
ABOUT THIS DOCUMENT ..................................................................................................................... v
Purpose of this Manual ............................................................................................................................. v
Liability ...................................................................................................................................................... v
Revision History ........................................................................................................................................ v
WARRANTY STATEMENT..................................................................................................................... vi
SOFTWARE SERVICE OVERVIEW ......................................................................................................... vii
Software Updates and Enhancements.................................................................................................... vii
RETURNED MATERIAL AUTHORIZATION............................................................................................ viii
RMA Purpose ......................................................................................................................................... viii
CUSTOMER SERVICE............................................................................................................................ ix
COMPANY BACKGROUND .................................................................................................................... x
TABLE OF CONTENTS........................................................................................................................... xi
LIST OF FIGURES..................................................................................................................................xv
LIST OF TABLES .................................................................................................................................xvii
1.0 OVERVIEW............................................................................................................................... 1-1
1.1 Key Features ..............................................................................................................................1-1
1.2 Applications ............................................................................................................................... 1-2
1.3 Main System Components.........................................................................................................1-2
1.3.1 2050-DSS Tow Vehicle ..........................................................................................................1-2
1.3.2 2050-DSS Starmux IV Topside...............................................................................................1-4
1.3.3 Tow and Test Cables .............................................................................................................1-4
1.4 Optional Equipment .................................................................................................................. 1-4
1.4.1 ROV Mounting Kit .................................................................................................................1-4
1.4.2 Magnetometer......................................................................................................................1-4
1.4.3 USBL Responder Beacon.......................................................................................................1-5
1.4.4 Pressure Sensor .................................................................................................................... 1-5
1.4.5 SBG AHRS .............................................................................................................................. 1-5

xii
2050-DSS Side Scan and Sub-Bottom System 0024048_REV_A
2.0 SPECIFICATIONS....................................................................................................................... 2-6
2.1 2050-DSS Tow Vehicle Specifications ........................................................................................2-6
2.1.1 2050-DSS Towfish Physical Specifications ............................................................................2-6
2.1.2 2050-DSS Sonar Specifications .............................................................................................2-7
2.2 Starmux IV Topside Specifications.............................................................................................2-8
2.3 Tow Cable Specifications ...........................................................................................................2-9
2.3.1 Armored Tow Cable Specifications .......................................................................................2-9
2.4 2050-DSS Mechanical Drawings ..............................................................................................2-11
2.4.1 2050-DSS Towfish Mechanical Drawing .............................................................................2-11
2.4.2 2050-DSS Electronic Bottle and End Cap Configuration Drawing.......................................2-12
2.4.3 2050-DSS Sub Bottom Transducer Drawing .......................................................................2-13
2.4.4 2050-DSS PVDF Hydrophone Drawing................................................................................2-14
2.4.5 2050-DSS Side Scan Transducer Drawing ...........................................................................2-15
2.4.6 2050-DSS Test Cable Drawing.............................................................................................2-16
2.4.7 2050-DSS Starmux IV Topside Digital Link Drawings ..........................................................2-17
3.0 TECHNICAL DESCRIPTION....................................................................................................... 3-19
3.1 2050-DSS Tow Vehicle Technical Description..........................................................................3-19
3.1.1 2050-DSS Towfish System Diagram ....................................................................................3-20
3.1.2 2050-DSS Sonar Processor Diagram ...................................................................................3-21
3.1.3 2050-DSS Sonar Processor Endcap Diagram.......................................................................3-22
3.1.4 2050-DSS Main I/O Interface (J1) .......................................................................................3-23
3.1.5 2050-DSS Magnetometer I/O Interface (J2) .......................................................................3-24
3.1.6 2050-DSS Responder I/O Interface (J8) ..............................................................................3-25
3.2 2050-DSS Starmux IV Topside Technical Description ..............................................................3-26
3.2.1 Starmux IV Controls, Indicators, and Connections .............................................................3-26
3.2.2 Starmux IV 2050 Rack Mount Controls, Indicators, and Connections................................3-28
4.0 SETUP AND ACTIVATION........................................................................................................ 4-31
4.1 Unpacking and Inspection .......................................................................................................4-31
4.2 Power Requirements ...............................................................................................................4-31
4.2.1 Use of an Uninterrupted Power Supply..............................................................................4-31
4.2.2 Change to a Non-US Power Plug.........................................................................................4-32
4.3 Topside Processor Placement..................................................................................................4-32

xiii
4.4 Connecting the System Components ......................................................................................4-32
4.4.1 Connecting and Attaching the Tow Cable to the Towfish ..................................................4-33
4.4.2 Connecting the Tow Cable to the Starmux IV.....................................................................4-33
4.4.3 Connecting the Starmux IV to the Computer .....................................................................4-34
4.4.3.1 Connecting to the Starmux IV DL................................................................................4-34
4.4.3.2 Connecting to the 2050 Rack Mount with Starmux IV DL ..........................................4-35
4.4.4 Navigation Interface ...........................................................................................................4-36
4.4.5 TCP/IP Address Settings......................................................................................................4-36
4.5 Performing System Pre-Deployment Testing ..........................................................................4-37
4.5.1 Testing the Sonar Processor ...............................................................................................4-37
4.5.2 Performing Sub Bottom Pre-Deployment Checks ..............................................................4-38
4.6 SBG AHRS Usage ......................................................................................................................4-41
4.7 Tow Vehicle Bridle Removal, Adjustment, and Installation ....................................................4-42
4.7.1 Tow Bridle Removal ............................................................................................................4-42
4.7.2 Tow Bridle Adjustment .......................................................................................................4-44
4.7.3 Tow Bridle Installation ........................................................................................................4-44
4.8 Towfish Deployment................................................................................................................4-47
4.9 Towfish Layback Charts ...........................................................................................................4-50
4.9.1 Cable A320327 Layback Chart ............................................................................................4-51
4.9.2 Cable A302799 Layback Chart ............................................................................................4-52
4.9.3 Cable A309183 Layback Chart ............................................................................................4-53
5.0 MAINTENANCE ...................................................................................................................... 5-54
5.1 Cleaning the Tow Vehicle and Cable After Use .......................................................................5-54
5.2 Inspecting and Cleaning the Underwater Connectors ............................................................5-54
5.3 Tail Rudder Removal and Installation......................................................................................5-54
5.4 Storage.....................................................................................................................................5-57
5.5 Opening the 2050-DSS Towfish ...............................................................................................5-57
5.6 Sonar Processor Removal and Installation ..............................................................................5-59
5.7 Sub-Bottom Transducer Removal and Installation..................................................................5-61
5.8 Operating System Restoration.................................................................................................5-62
6.0 TROUBLESHOOTING............................................................................................................... 6-64
6.1 Starmux IV Troubleshooting ....................................................................................................6-64

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2050-DSS Side Scan and Sub-Bottom System 0024048_REV_A
A.0 KITS...................................................................................................................................... 6-66

xv
LIST OF FIGURES
Figure 1-1: 2050-DSS Side Scan and Sub Bottom Imagery Displayed in Discover .....................................1-1
Figure 1-2: 2050-DSS Towfish Side View....................................................................................................1-3
Figure 1-3: 2050-DSS Towfish Forward View.............................................................................................1-3
Figure 1-4: 2050-DSS Towfish Aft View......................................................................................................1-3
Figure 1-5: Case Mounted Starmux IV and EdgeTech CPU .......................................................................1-4
Figure 1-6: Test Cable ................................................................................................................................ 1-4
Figure 1-7: 2050-DSS Magnetometer Interface.........................................................................................1-5
Figure 2-1: 2050-DSS Towfish Drawing (0023737)-Click Image For Embedded PDF ...............................2-11
Figure 2-2: 2050-DSS Electronics Bottle Drawing (0023404)...................................................................2-12
Figure 2-3: 2050-DSS KT-216D Transducer Drawing (0012552) ..............................................................2-13
Figure 2-4: 2050-DSS Hydrophone PVDF Drawing (0017353) .................................................................2-14
Figure 2-5: 2050-DSS Side Scan Array Drawing (0019213) ......................................................................2-15
Figure 2-6: Test Cable (0011690) .............................................................................................................2-16
Figure 2-7: Starmux IV ICD (0022246)- Click Image For Embedded PDF .................................................2-17
Figure 2-8: 2050-DSS Rack Mounted Option ...........................................................................................2-18
Figure 3-1: Bottom View of 2050-DSS Towfish ........................................................................................3-19
Figure 3-2: 2050-DSS Towfish System Diagram .......................................................................................3-20
Figure 3-3: 2050-DSS Sonar Processor Diagram (0023520).....................................................................3-21
Figure 3-4: Sonar Processor Endcap Diagram (0023521) ........................................................................3-22
Figure 3-5: Tow Cable to Electronic Bottle Diagram (002915) ................................................................3-23
Figure 3-6: Magnetometer Interface Cable Diagram (0007367) .............................................................3-24
Figure 3-7: Starmux IV Front and Back Panels .........................................................................................3-27
Figure 3-8: Labeled Front Panels of 2050 Rackmount .............................................................................3-29
Figure 3-9: Labeled Rear Picture of 2050 Rackmount .............................................................................3-30
Figure 4-1: Starmux IV and Computer Connected By Ethernet Cable .....................................................4-33
Figure 4-2: Starmux IV Sea Cable Connector ...........................................................................................4-34
Figure 4-3: Discover Serial Port Configuration.........................................................................................4-36
Figure 4-4: Windows Manual IP Properties Window...............................................................................4-36
Figure 4-5: Command Prompt Ping Test..................................................................................................4-37

xvi
2050-DSS Side Scan and Sub-Bottom System 0024048_REV_A
Figure 4-6: Sonar.exe Successful Self-Test...............................................................................................4-38
Figure 4-7: Status Indicator Bar- NET: ON................................................................................................4-38
Figure 4-8: Discover 2050 Sub-Bottom Display Window.........................................................................4-39
Figure 4-9: The Sub-Bottom Control Tab .................................................................................................4-39
Figure 4-10: Sub-Bottom Control Tab-Pulse and Transmit Level Called Out...........................................4-40
Figure 4-11: Sub-Bottom Shortcut Toolbar- Range Text Field and Normalize Gain Button Called Out ..4-40
Figure 4-12: Sub-Bottom Display Tap Test Results ..................................................................................4-41
Figure 4-13: 2050-DSS Starboard Bridle Power and Data Cable Cable-Tie Locations .............................4-43
Figure 4-14: Tow Bridle Arm Removal Hardware ....................................................................................4-44
Figure 4-15: Tow Fish Bridle Mounting Bracket Positioning....................................................................4-45
Figure 4-16: Tow Bridle Arm Removal Hardware ....................................................................................4-46
Figure 4-17: 2050-DSS Starboard Bridle Power and Data Cable Cable-Tie Locations .............................4-46
Figure 4-18: 2050-DSS Tow Cable and Grip Bridle Attachment...............................................................4-47
Figure 4-19: 2050-DSS Towfish Deployment ...........................................................................................4-49
Figure 4-20: Bottom Track Tab ................................................................................................................4-49
Figure 5-1: 2050-DSS Tail Rudder [3] Bolt Hardware Assembly Locations ..............................................5-55
Figure 5-2: Tail Rudder Bolt Hardware ....................................................................................................5-56
Figure 5-3: Tail Rudder Bolt Hardware Disassembly................................................................................5-56
Figure 5-4: 2050-DSS Upper-Shell Disassembly [13] Bolt-Hardware Locations.......................................5-57
Figure 5-5: 2050-DSS Bolt Hardware Disassembly...................................................................................5-58
Figure 5-6: 2050-DSS Bolt Hardware Assembly .......................................................................................5-58
Figure 5-7: 2050-DSS Sonar Processor Mounting Assembly....................................................................5-59
Figure 5-8: 2050-DSS Vertically Mounted Sub-Bottom Transducer Removal and Installation ...............5-61
Figure 5-9: 2050-DSS Sub Bottom Transducer Clamp and Mount Orientations .....................................5-62

xvii
LIST OF TABLES
Table 2-1: 2050-DSS Towfish Specifications ..............................................................................................2-6
Table 2-2: 2050-DSS Sonar Specifications..................................................................................................2-7
Table 2-3: Starmux IV Specifications..........................................................................................................2-8
Table 2-4: Armored Cable A309183 Specifications....................................................................................2-9
Table 2-5: Armored Cable A392799 Specifications....................................................................................2-9
Table 2-6: Armored Cable A320327 Specifications..................................................................................2-10
Table 3-1: Main I/O Interface Cable Pin Outs ..........................................................................................3-23
Table 3-2: Magnetometer Interface Cable Pin Outs ................................................................................3-24
Table 3-3: Responder IO Pin Outs ............................................................................................................3-25
Table 3-4: Starmux IV Controls, Indicators, and Connections .................................................................3-26
Table 3-5: Starmux IV Rack Mount Controls, Indicators, and Connections .............................................3-28
Table 4-1: AC Power Wiring Wire Colors for Conversion.........................................................................4-32
Table 4-2: 2050-DSS Factory Installed Component IP Addresses ............................................................4-37
Table 4-3: 2050-DSS Tow Bridle Removal Tools ......................................................................................4-43
Table 4-4: 2050-DSS Tow Bridle Installation Tools and Hardware ..........................................................4-45
Table 4-5: Cable A320327 Layback Chart.................................................................................................4-51
Table 4-6: Cable A302799 Layback Chart.................................................................................................4-52
Table 4-7: Cable A309183 Layback Chart.................................................................................................4-53
Table 5-1: Tail Rudder Removal and Installation Tools and Hardware....................................................5-55
Table 5-2: Upper-Shell Disassembly and Assembly Tools and Hardware................................................5-58
Table 5-3: Sonar Processor Installation and Removal Tools and Hardware............................................5-60
Table 5-4: Sub-Bottom Transducer Removal and Installation Tools and Hardware................................5-61
Table 6-1: Starmux IV Troubleshooting Table..........................................................................................6-65
Table 6-2: 2050-DSS Accessory Kit...........................................................................................................6-66

1-1
1.0 OVERVIEW
The EdgeTech 2050-DSS (Deep Side Scan Sonar and Sub-Bottom Profiler) is a fully integrated tri-frequency
side scan and sub-bottom system that is particularly useful in conducting high-resolution sub-bottom
surveys close to the seabed. The system’s hydrodynamic towfish configuration options are currently a 2-
16 kHz sub-bottom profiler that utilizes a polyvinylidene fluoride (PVDF) panel receive hydrophone that
provides excellent sub-bottom receive sensitivity and directivity. The 2050-DSS system comes with either
a 120/410/850 kHz or a 230/540/850 kHz side scan sonar array using EdgeTech’s proven CHIRP technology
to provide crisp, high-resolution side scan imagery. The system is controlled, data is collected and
processed by a topside Starmux IV Digital link and an EdgeTech Discover Software enabled computer. The
2050-DSS can be integrated with auxiliary sensors such as a magnetometer, depth sensor, altitude sensor,
and a USBL responder. The system can also be integrated with an ROV (Remotely Operated Vehicle) with
a mounting kit.
1.1 Key Features
Fully Integrated Turn-Key System: The system comes delivered to customer specifications with minimal
setup and configuration.
Tri-Frequency Side Scan Sonar:The
standard 2050-DSS configurations
are either a 120/410/850 kHz or
230/540/850 kHz array that can
operate any two frequencies
simultaneously. The system
frequency choice can be
reconfigured instantly, allowing the
operator to react and optimize range
and resolutions to changing survey
conditions and to use the system in
multiple roles.
Sub-Bottom Profiler:The 2050-DSS
system has enhanced sub-bottom
profiling capabilities with a low-
frequency transducer and a PVDF
receiver. Mounted within the system
is a single 2-16 kHz transducer that provides improved directionality and the ability to focus power where
needed. The PVDF receive panel provides 2D directionality and improved sensitivity over simple line
arrays.
Reflection Coefficient Calculation: The Discover 2050 Software shipped with the 2050 system provides
reflection coefficient calculation to help with bottom sediment composition identification.
Figure 1-1: 2050-DSS Side Scan and Sub Bottom Imagery
Displayed in Discover

1-2
2050-DSS Side Scan and Sub-Bottom System 0024048_REV_A
Digital Telemetry Over a Single Coaxial Armored Tow Cable: The topside processor interfaces with the
towfish over an armored 10/100BaseT cable connection, using asynchronous digital subscriber line (ADSL)
modems.
Deep Water Operations: The system is rugged and rated to a depth of 2,000 meters. An optional Edgetech
armored cable provides digital telemetry over a single coaxial type cable up to 6,000 meters in total length.
Additional Payload Options:The 2050-DSS can be integrated with magnetometers, depth sensors,
altitude sensors, and a USBL responder.
ROV Mounting Option:The system components can be mounted on a ROV with a mounting kit.
1.2 Applications
Applications for the 2050-DSS Combined Side Scan Sonar and Sub-Bottom Profiling System are many, a
few of which are the following:
•Cable and Pipeline Surveys
•Geological/Geophysical Surveys
•Sediment Classification
•Pre/Post Dredging Surveys
•Archeological Surveys
•Scour/Erosion Investigation
•Marine Construction Surveys
1.3 Main System Components
The 2050-DSS Combined Side Scan Sonar and Sub-Bottom Profiling System consists of a rack-mounted
Starmux IV topside digital link, an attached computer with EdgeTech’s Discover 2050 software installed,
an armored tow cable, and the 2050-DSS Tow Vehicle.
1.3.1 2050-DSS Tow Vehicle
The 2050-DSS is a hydrodynamic towfish designed to accommodate multiple system payloads. The sonar
electronics are contained inside a single housing where side-scan transducer arrays and sub-bottom
transducers are attached. The towfish comes standard with either a 120/410/850 kHz and 2-16 kHz sub-
bottom profiler with PVDF receiver or a 230/540/850 kHz tri-frequency side-scan sonar configuration and
2-16 kHz sub-bottom profiler with PVDF receiver.

1-3
Figure 1-2: 2050-DSS Towfish Side View
Figure 1-3: 2050-DSS Towfish Forward View
Figure 1-4: 2050-DSS Towfish Aft View