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Simrad SU90

The Simrad SU90 is the ultimate long-range, low-frequency fish-finding sonar. We made no compromises during the design of this sonar. If high performance is your only criterion when choosing a sonar, this is your natural choice.

If long range, high resolution, narrow beams and high source levels are essential criteria for you, the Simrad SU90 is the sonar you need. We made no compromises during the design of this sonar. Our goal was to make the ultimate performance sonar.

The SU90 allows you to choose an operational frequency between 20 to 30 kHz (in 1 kHz steps). The cylindrical multi-element transducer allows the omnidirectional sonar beams to be tilted electronically from +10 to –60 degrees. This allows you to automatically track schools of fish and observe the whole water volume around the vessel. A stabilizing system is included for electronic pitch and roll compensation.


Compared to the Simrad SX90, the number of channels is increased by 50%, giving the sonar an even better performance in selectivity and range.

The narrow opening angle (4,9 degrees at 30 kHz) and the increased source level (3 dB) make the SU90 a powerful, high-resolution, low-frequency sonar. The narrow beam makes the SU90 even more ideal for searching for fish near the bottom or the surface at long ranges. It also provides a far better vertical view with less "bottom climbing" that is seen on sonars with a wider beam.

Providing several standard interface lines makes communicating with peripheral devices and sensors easy. Typical inputs are geographical information from a positioning system, vessel speed and the vessel's current heading. By default, the sonar uses a built-in motion sensor. An external motion reference unit (MRU) can be connected for improved operational accuracy.

The echo presentations are optimized for multiple displays. Provided that you have connected additional displays to your Processor Unit, you can use the Docking Views function to take any sonar view and place it on a separate display monitor. When you move an echo view to another display monitor, it will automatically be scaled for the best possible result.

It is common for sonars to require many "pings" to build the various views in the echo presentations. We create the echo presentations using the echoes from one single ping. This functionality dramatically improves the update rate and provides better real-time information.

You can record real-time sonar situations. This recording function allows you to replay complete echo sequences. The playback contains the same echo information. You can use it for mission history, training or troubleshooting purposes.

Compared to our previous sonars, we have improved the tracking function. It can now use echo information from both the horizontal and vertical transmissions.

We have placed great emphasis on an intuitive user interface and the best possible sonar presentations on a high-resolution colour monitor.

The sonar offers our celebrated signal processing software. This software includes Hyperbolic FM (HFM) transmissions. This pulse type is also known as "chirp". It ensures a clutter-free picture with a very high range resolution. The signal processing and beamforming are performed in a fast digital signal processing system using the full dynamic range of the echo signals.

The SU90 Processor Unit is controlled by the Microsoft® Windows® operating system, resulting in a flexible choice of presentation modes for many user applications.

Key features

  • 360 degrees omnidirectional
  • 90 degrees vertical tip
  • Operational frequency adjustable from 20 to 30 kHz
  • Narrow beams (opening angle 4,9 degrees at 30 kHz)
  • Increased source level (3 dB higher than SX90)
  • Hyperbolic FM transmissions ("Chirp")
  • Large dynamic range
  • High definition
  • Stabilized beams
  • Dual-beam operation
  • Easy operation
  • Store and recall sonar data
  • Define and save your own user settings
  • Clear and easily comprehensive sonar data

The narrow beams provided by the SU90 sonar give you several advantages. They will increase the sonar's range and resolution and offer a vertical view with additional details and a clearer picture. The narrow beams will also decrease the noise level.

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.