Simrad SH90 Features and functionality

Multiple operational frequencies

On any fishing vessel you have numerous sources for noise, such as propellers, generators, engines and other hydroacoustic equipment.

When other vessels are fishing in the vincinity using the same sonar as you have, you may also experience acoustic disturbance from these.

With the multiple frequency operation provided, you will still be able to tune your sonar for maximum performance. This will allow you to avoid interference both from your own, and from other vessels.

The multiple frequency operation comes very handy in other situations as well; high and low frequencies have different detection ranges on different conditions and species.

Beam stabilisation

When the beam stabilisation is activated, both the horizontal and vertical beams are electronically stabilised for the vessel's roll and pitch movements.

This allows the full circle sonar beam to stay on the target independent of the vessel movements, even in rough seas. You will always maintain a clear picture of the targets.

To improve the accuracy of the beam stabilisation, you can connect a dedicated motion reference unit (MRU) sensor.

Dual beam

The combination of the horizontal and vertical beams displays the school of fish from above and from the side at the same time.

It is not necessary to go over the target to see the vertical distribution on the echo sounder.

User selectable beam width

Simrad is often first with new sonar features. We now provide you with user selectable beamwidth.

This feature provides improved range and better resolution in the horizontal picture.

When you search for fish at long distances you will set the beamwidth to "narrow" for maximum detection range. When you approach the fish you will use shorter range. The sonar can then be set to change beamwidth to "normal" or "wide" automatically, or you can select the appropriate setting manually. The beamwidth is frequency dependant.

A. Wide beam
B. Normal beam
C. Narrow beam

Full screen presentation

In full screen presentation, the echo presentation will be extended to cover the entire display area. You can also hide the menu if you don't need it.

Off centre presentation

Offset the vessel to any screen position, and enlarge the echoes for more detailed information. In this example, the menu has been hidden from view.

Dual mode presentation

In the dual mode, we provide you with "two sonars in one".

Each sonar presentation can be set up as if you had two different sonars working simultanously. Individual frequencies, tilt angles, ranges, gain and filters can be used.

The presentation may be organized horizontally or vertically to fit your preferences. In this example, the menu has also been hidden from view.

User settings

In many cases, the sonar on the bridge has several users. Each user has often his or her own favourite settings.

On this sonar, you can save these settings using your own name, and retrieve them whenever you take charge of the sonar operations. This saves you valuable time as your favourite colours, settings and parameters are only a few "clicks" away.

Store and recall sonar images

All Simrad sonars include a Store/Recall function.

You can choose to save either single sonar images or sequences during a normal sonar search.

Later, you can easily play the images back on the sonar display if you wish to study the sonar data in more detail.

You can also copy the images to an external hard disk, or to a USB memory device.