Simrad SN90

For trawlers, the Simrad 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.

The transducer can be fixed to the hull or bulb like a regular echo sounder transducer. If you need protection against ice or obstacles in the sea, you can use a hull unit. With a hull unit, you can retract the transducer when the SN90 is not used.

In this configuration, the sonar beams point forward in a wide swath that can be tilted to match your requirements. A complete vertical slice is also available, as well as separate inspection split beams. These can be individually trained and tilted to fit your needs. Stack the inspection beams on top of each other, or spread them out to investigate echoes on either side of the vessel. Bottom detector and bottom expansion functionalities have been included in the inspection beam presentations, as well as a zoom option. This allows you to detect fish close to the bottom, giving you more time to decide before the fish reaches the trawl.

Purse seiners benefit greatly from the Simrad 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.

With the SN90 transducer mounted on the side of the hull facing the purse seine, you can work safely without damaging it with ropes and wires. Since the transducer is flush-mounted, you do not need to retract it for protection.

Many individual beams provide you with a wide coverage area, and you can tilt the search area all the way down. In addition to this, the individually steerable inspection beams can be used for more detailed inspections. You can observe fish behaviour, target strength and biomass. This allows you to run alongside a school of fish and observe, just as you would with a "horizontal" echo sounder. By analyzing the school without passing over it, fish avoidance is minimized. The additional information provided by the SN90 will further help you to reduce the bycatch, and you can detect unwanted species. To catch the correct school size you can conduct a volume estimation before setting the net.

When fitted with a hull unit, you can take advantage of the transducer- and hydrophone combination offered by the SN92HPX and SN93HPX hull units. We have equipped the transducer housing on these hull units with two gear monitoring hydrophones.

The hydrophones receive the acoustic communications from the gear monitoring sensors on the gear and convert these to electrical signals.

Both hydrophones point aft. They connect to a suitable gear monitoring receiver, typically the Simrad SR70 or the Simrad SR15.

This sonar uses the latest "Winson" operating software. This unique software platform is common for all Simrad sonars. It allows you to present the various sonar echoes in separate views, which you can move to separate display monitors. Another great feature of the new software is its ability to "ping" all the beams simultaneously. Multiple pings increase the ping rate and thus offer a more frequent update of the sonar echoes in the views.

Other standard features of the "Winson" operating software are:

• User interface in more than 20 languages
• Intuitive access to all operating parameters
• Save and recall your favourite user settings
• Save and replay sonar images and video sequences
• Target and position tracking

The sonar system provides several standard interface lines. These interfaces ensure seamless communication with peripheral devices and sensors, with typical inputs like geographical information, vessel speed, and heading. The built-in motion sensor enhances operational accuracy, and you can increase this accuracy by adding an external motion reference unit (MRU).

This sonar supports the optional Operating Panel Mk.2. 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 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.

Kongsberg Discovery owns the Simrad brand name, which is your assurance of quality. All Simrad products are backed by Kongsberg Discovery's extensive worldwide support and training. On the Support pages, we have provided the relevant Simrad contact information for professional fish-finding systems for direct assistance.

Simrad provides a global sales organization for product information, software updates, and purchases.

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