No longer sold

Simrad CS90

The Simrad CS90 is an omnidirectional broadband fish-finding sonar.

The Simrad CS90 is the first omnidirectional broadband sonar on the market. The world's first composite transducer makes it possible to transmit and receive in a wide frequency range. This makes it possible to achieve high resolution on longer ranges. You can also adjust the operating frequency for better detection, or to avoid a noise source such as another echo sounder or hydroacoustic system.

The CS90 is designed for fishing vessels of all sizes, both purse seiners and trawlers. The centre operational frequency is 85 kHz, but you can select any operational frequency from 70 to 90 kHz in steps of 1 kHz. The cylindrical multi-element transducer permits the omnidirectional sonar beams to be tilted electronically from -10 to +84 degrees. With this functionality, you can automatically track schools of fish, even at close range, and observe the whole water volume around the vessel. A stabilizing system is included for electronic pitch and roll compensation.

The CS90 offers the same user interface and operating software as our other sonars, echo sounders and catch monitoring systems. This enables easier and faster training of new users.

Software version

The current software version is v23.9.2. All applicable information related to this software release can be found in the software release note.

The release note is only available in English. Contact your local dealer for assistance. He/she can provide the software update and will install the software for you. Your dealer can also provide other advice related to the use and maintenance of your sonar system.

End-user documentation

A collection of end-user manuals and related documents for the Simrad CS90 system is provided. All public documents related to this product can be accessed using the links below. The documents are provided in several formats including PDF, HTML, EPUB and/or CHM. When applicable, certain publications are available as interactive electronic technical manuals (IETM) on separate websites.

System diagram

The Simrad CS90 comprises a Processor Unit (computer) with an operating panel, a transceiver and a hull unit with the transducer.


(A) Display  (the second display is optional)
(B) Processor Unit (computer)
(C) Operating Panel
(D) Transceiver Unit
(E) Hull Unit
(F) Transducer

The cable between the wheelhouse units and the CS90 Transceiver Unit in the sonar room must be a high-quality Ethernet cable. This cable can be purchased locally, or ordered from us.

Hull units for the Simrad CS90 Fish finding sonar

Hull unit Lowering depth Transducer cable Maximum speed
CS90 1 m 4.6 or 10 m 20 knots
CS94 2.1 m 4.6 or 10 m 19 knots

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.

End-user documentation