Installation manual

System description

850-164186 / Rev.D

Sonar room units

The Transceiver Unit is located in the sonar room, close to the

Hull Unit. One signal cable is used for communication with the

Sonar Interface Unit in the wheelhouse. The transceiver

performs the signal processing and the digital beamforming of

the 241 transmitters and 241 receiver channels, which are

located on the eight identical transceiver boards.

The standard Hull Unit is designed to lower the transducer 1.0

meters below the ship’s hull. (Optional hull units will lower the

transducer to 1,2 or 1,6 meters below the hull.) The transducer

can also be lowered to any selectable middle position. Note that

in case of voltage failure, the Hull Unit can be manually raised

or lowered by means of a hand crank.

The spherical 241-elements transducer allows the sonar beam

to give full 360 degrees coverage of the water volume around

and below the vessel.

The sensor for the electronic stabilization of the sonar beams is

housed in the Motor Control Unit, which is mounted on the Hull

Unit.

Warning If the transducer hits larger objects or bottom,

the transducer shaft may be bent, or in worst

caseitcanbebrokenoff.Abrokentransducer

shaft will cause water leakage in the top of the

shaft. To prevent larger leakages in such a case,

do not

raise the transducer shaft to the upper

position. To prevent serious damages it is

therefore of great importance to have a good

pump and warning system in the sonar room.