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Simrad SN90

The Simrad SN90 introduces a new and efficient tool for purse seiners and trawlers.

Some have called the SN90 "five echo sounders in one" after experiencing the information from the five individually controlled inspection beams.

We have created an online simulator so you can experience these yourself. Try it here!


On a trawler, the forward-looking transducer is mounted on the vessel’s bow, well protected against acoustic noise from the hull, machinery and propellers. The high resolution and long range allow you to detect and investigate single fish and schools - even those close to the bottom - from a distance of several hundred meters. The sonar beams point forward in a 120 degrees swath.

Purse seiner

On a purse seiner, the side-looking transducer gives you full control over the setting of the seine. It is installed on the side of the hull facing the purse seine. There is no need to retract the transducer using a large hull unit. A large horizontal coverage area provides you with a full overview. The 256 individual beams have a horizontal coverage area of 160 degrees and the vertical beam width is typically 5 to 8 degrees (varies with the frequency).

Key facts

  • Up to 160 degrees of horizontal coverage
  • Up to 60 degrees vertical coverage
  • Five separate inspection beams
  • 0 to 60 degrees tilt
  • Operational frequency band from 75 to 95 kHz
  • Narrow vertical beam
  • Hyperbolic FM transmissions (“Chirp”)
  • Wide bandwidth
  • Large dynamic range
  • High resolution
  • Stabilized beams
  • Easy operation
  • Store and replay raw sonar data
  • Define and save your own user settings
  • Cost-efficient solution

Online simulator

Our online simulator allows you to experiment with the powerful features offered by the SN90 inspection beams. Each inspection beam can be controlled individually.


Services and 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.

  • Conversions, retrofit and refit

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

  • Training

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