Simrad SL35 Searchlight sonar for purse seiners and trawlers

The Simrad SL35 Hull Sonar series is a short range mechanical scanning sonar designed for small and medium sized purse seiners and trawlers. The system provides real time images from the sonar dome to the bridge, thus maximizing the best possible presentation on a high-resolution color monitor.The SL35 Sonar allows the operator to monitor the complete operation, by displaying individual fish school target locations in the horizontal plane. In addition the SL35 Sonar provides a Vertical Fan mode, specially made for trawling, where a complete overview of the horizontal and verticalplane is presented. The sonar beam can be horizontally trained 360 degrees or 180 degrees in the vertical plane. The automatic search features with full -90°tilt capability ensures maximum control during the tow and/or pursing. The active motion compensation for pitch and roll and the audio speaker are optional. The SL35 Sonar is a modular system. It is ope-rated with ease through a direct access control panel with an integrated roller ball. When the optional beam stabilizer is activated, both the horizontal and vertical beams will be electronically stabilized for roll and pitch movements up to ±20°. The full circle beam will then stay on the target inde-pendent of the vessel movement. This secures opti- mal contact with the target even in rough seas. The horizontal beam covers360°around the vessel and can be tilted from +10°up to -90°down. When tilting, the total beam picture can be compared with folding an umbrella, which means that all beams in 360°around the vessel have the same tilt angle. The vertical beam covers a 180°vertical slice under the vessel. This is useful for visualizing the vertical distribution of the school of fish.The vertical beam can be trained to any bearing around the vessel. The horizontal and verticalbeams gives an optimal visua- lizing of the catch situation. This is because the school of fish can be seen from above and from the side. In that way, it is not necessary to go over the target to see the vertical distribution on the echosounder. The SL35 sonar dome The SL30 catch sonar dome
The SL35 can operate in the horizontal mode and quickly be retrained in the vertical mode with a single button press.A flexible choice for a large range ofuser applications, with 6 different displaymodes and 4 customized user modes, providing the operator with the bestoverview for the type of fishing. The advantage of the SL30 for purse seining is that the dome does not need to be retracted during the catch phase. This provides a complete picture of the net and catch during this critical phase. The high frequency sonar signal gives an accurate picture of the purse seine. The SL30 sonardome protrudes only 15 cm from the ship´s hull. The hull unit sonardome is lowered 250 mm or 400 mm below the ship´s hull and is available in two frequencies, 90kHz and 160kHz.