Simrad SN90

Innovative and efficient sonar for purse seiners and trawlers

Simrad SN90 introduces a new and efficient tool for purse seiners and trawlers. Dubbed 'five echo sounders in one', the SN90 provides unprecedented insights through its five individually controlled inspection beams. An online simulator is also available, allowing users to experience these capabilities firsthand.

WINSON operating software

The SIMRAD SN90 uses the latest "Winson" software. This unique software platform is common for all Simrad sonars. It allows you to present the various sonar echoes in separate views, which can be placed on separate display monitors. Another great feature of the new software is its ability to "ping" all the beams simultaneously. This increases the ping rate and thus offers a more frequent update of the sonar echoes in the views.

Innovative sonar capabilities for trawlers

For trawlers, the SN90 features a forward-looking transducer mounted on the bow, shielded from acoustic interference from hull movement, machinery, and propellers. Its high resolution and extensive range help detect individual fish and schools from hundreds of meters away. With a transducer that projects a 120 degree swath, the SN90 offers a powerful tool for long-range fish detection.

Enhancing purse seine operations

Purse seiners benefit greatly from the SN90's side-looking transducer, which enhances seine setting with comprehensive control. It requires no retraction due to the side hull mounting. The transducer beams cover a vast horizontal area of 160 degrees, while the vertical beam width spans 5 to 8 degrees, varying by frequency. This enables purse seiners to maintain a full overview of their operations.

Sonar operating panel

You can set up your SIMRAD SN90 sonar with the Mk2 Sonar Operating Panel. This operating panel uses a handy multifunction joystick. The joystick facilitates tilt, vertical, and inspection beam control through simple pushes or twists of the knob. The operating panel communicates with the Processor Unit using an Ethernet connection. This communication format allows for advanced functionality. You can manage up to four different SIMRAD sonars using a single panel. Conversely, up to three panels in various locations on the vessel can operate a single sonar. The USB port on the operating panel also provides convenient software upgrades and user settings management. The sonar operating panel also features dedicated and customizable buttons and knobs, and its design allows for a straightforward upgrade from older panels using a mounting bracket.


Keep your SIMRAD SN90 updated with the latest software version. Follow us on social media to keep up with the changes, and contact your dealer for upgrades. For the latest software version, check the dedicated SN90 software article.

End-user documentation

All relevant user- and installation manuals, certificates and drawings for the SIMRAD SN90 fish-finding sonar are available. To access the information, open the relevant article using the link at the bottom of this page. Several formats are provided, including interactive electronic technical manuals (IETM). Selected publications are also available in additional languages.

Key features

  • 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

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