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Scanmar AS  -  3179 Åsgårdstrand -  Norway

 Phone: +47 33 35 44 00 -

Trawl Sounder

#ScanMar Trawl Sounder v01-21

  • Advanced echo sounder showing fish influx and volume

  • Measures the height of the trawl opening, whether the trawl is on the bottom and the distance between the trawl and the bottom

  • Used in pelagic, bottom trawling as well as Danish/Scottish Seine

  • Ideal to pair with DoorSensors for showing a simplified trawl geometry


Advanced Echo Sounder

The TrawlSounder is an advanced echo sounder showing the height of the trawl opening, if the trawl is on the seabed and the distance between the trawl and seabed.

It also provides a simplified “sonar” that shows whether there is fish influx and the volume. Choose between “classic view” or “density view” on your Bridge System. Wireless monitoring of the trawl opening and intermediate section of the trawl has become a matter of necessity in many of the world’s fisheries.

Mounted in the belly it shows whether the trawl height is stable, or if a bucket effect is arising and allowing fish to escape. It also shows the volume of fish passing through. Together with a TrawlEye in the opening it is easy to see whether the fish seen entering the opening end up in the cod end.

Trawl Geometry

The TrawlSounder is ideal together with the Door-Sensors and the TrawlSpeed / Symmetry sensor to get full control of the trawl’s geometry

Trawl Sounder

Trawl sounder



Trawl opening: 1.5 – 150m

Clearance: 1.5 – 150m

Fish density: 0 – 9

Resolution: 0.1m / fat.

Accuracy: ± 3 %


Update rate trawl opening: Approx. 11 sec

Update rate clearance: Approx. 8 sec

Update fish density: Approx. 8 sec

Max. Depth: 1200 m

Echo sounder

Frequency: 96 kHz

Beam width: 40 deg


Type: NiCd, 2x12V / 600 mAh

Charging time: 1.5 hour (QBC-05)

Operation time: Approx. 20 hrs


Frequency range: 38.9 – 43.4 kHz

Source level: 190 dB // 1uPa @ 1m

Beam width: 55 deg (- 3dB)

Range to vessel: Approx. 2500 m (Note 1)

Receiver: All except ScanCatch and MiniCatch


In air: 5.9 kg

In water: 1.9 kg

Main dimensions

Length: 246 mm

Width: 224 mm

Height: 104 mm

Available options

Mounting kit: 101879

Battery pack: 105485 (2 pcs)

Battery charger: QBC-05


Scanmar AS  -  3179 Åsgårdstrand -  Norway

 Phone: +47 33 35 44 00 -

Designed and produced in Norway

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