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1. OPERATIONAL OVERVIEW
2
1.2 Underwater Unit
1.2.1 Components of the underwater unit
The underwater unit mainly consists of a red polyurethane case and three
transducers. The vertical sonar transducer is the cylindrical red housing which
extends from the back of the case. The (gray) echo sounder transducer is
mounted near the front of the unit. The catch sensor receiver transducer is
located at the back of the unit, to the right of the vertical sonar transducer.
Pressure
Sensor
Echo Sounder
Transducer
Third Wire
Cable
Catch Sensor
Receiver Transducer
Vertical Sonar Transducer
Underwater unit, cover removed
1.2.2 Trawl system
Underwater
Unit
Third Wire
Cable
Catch
Sensor
(option)
Trawl system