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Side Scan Sonar - Dual frequency

Dual Frequency Side Scan Sonar
Dual Frequency Side Scan Sonar towfish and tranceiver for seabed feature mapping offering flexibility and high quality results.

A reliable sonar for general purpose surveys

Dual Frequency Side Scan Sonar system is the ideal tool for seabed feature mapping, offering high quality results in a simple and reliable package.

It offers switch selectable dual frequency operation (114 / 410 kHz), which when combined with multiplexed data transmission enables a low-drag coaxial cable to be used. The versatility, ease of operation and reliability have made it a popular choice for navies and commercial survey companies alike.

Key features

  • 1000 m depth rating
  • Switch selectable dual frequency (114 / 410 kHz)
  • High bandwidth and resolution
  • Multiplexed data transmission over long cables
  • Easy to operate
  • High reliability (MBTF > 10,000 hours)
  • High efficiency / low power
  • Simple maintenance

System components

The standard system employs a lightweight towfish (Model 159D), which is easily deployed by one person. The towfish houses a multiplexer (Model SS982), allowing data transmission over long cables, as well as the two dual frequency transducers (model 196D port and starboard). The transceiver unit (model SS981) outputs a signal compatible with all major acquisition systems.


The sonars deck unit allows the operator a simple means to select operation parameters such as operating frequency, Gain, Time Varying Gain (TVG) and Automatic Gain Control (AGC), with duplicated controls for the port and starboard channel.


The sonar towfish was designed as an easily deployable stable platform for versatile operations.


The Multiplexer is the sub-sea processing unit. It holds all transmit, receive and multiplexing electronics and uses standard sub-sea connectors to the transducers and tow cable, thereby ensuring that transmission power is not lost over the tow-cable and reducing the risks of high voltage defects.


  • 2000 m rated towfish
  • Stainless steel towfish
  • Range of winches and tow cables
  • Heading, pitch and roll sensor
  • Responder for acoustics tracking
  • Height of bottom measurement
  • Depth sensor
  • Magnetometer interface

Services & Aftermarket Support

24/7 Technical Support

Our 24/7 technical support team is there to help at any time, day or night, wherever your vessel is. We will manage your call from the time it is received to the time the issue is resolved.

The team has direct access to the experts in our product centres, should additional support be required, and for the more complex issues a product specialist will be assigned to you. Our priority is to get the right expertise quickly matched with the issue to provide the answers you need.

Support information this product

Key support information for this product is found here:

Contact us

The following contact information will put you through to our global support team:


We understand the importance of having the right parts, available in the right place, at the right time.

We have streamlined our operations to reduce lead-times and increase spares availability.

Contact us

Our 24/7 technical support team is there to help at any time of day or night wherever your vessel is located. They manage your call from the time it is received to the time the issue is resolved.

Contacting any of these numbers will put you through to our global support team:

Our local representatives will respond to your support requirements 24/7. If you want to know more about how our enhanced service delivery will benefit you, please contact our nearest Office.

Product Training

Ensure that your crew is properly and thoroughly trained. This will reduce operational risk, downtime and maximise return on asset investment.

It also enables you to meet regulatory standards, improve crew safety and retain key personnel. In our state of the art training centres qualified and experienced trainers are able to provide your crew with practical training tailored to suit your products, systems and operational requirements. Our instructors can also train your crew on-board your vessel.

From hands on experience on live products in our training centres, to experiencing real life scenarios in our world class simulators all our courses are designed to focus on efficient and safe operation and maintenance of your Kongsberg Maritime equipment.


  • BRAZIL, Rio de Janeiro
  • CANADA, Halifax
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  • GREECE, Athens - Elliniko
  • MEXICO, Veracruz
  • NORWAY, Horten Bekkajordet
  • NORWAY, Horten Strandpromenaden
  • NORWAY, Kongsberg
  • NORWAY, Trondheim Grilstad
  • NORWAY, Trondheim Seatex
  • POLAND, Szczecin
  • SINGAPORE, Singapore, Jurong East
  • SINGAPORE, Singapore, Tuas
  • SOUTH KOREA, Busan
  • UNITED KINGDOM, Aberdeen
  • UNITED STATES, Houston
  • UNITED STATES, New Orleans

This type of solution is ideal for theoretical training, especially for larger groups. It goes through detailed systems overview including drawings and functionality.

This type of solution is ideal for practical training with focus on maintenance and troubleshooting on actual products. This type of training used together with classroom training can provide a holistic view of complete systems.