Operation Manual

System description

850-164385 / Rev.C

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 240 transmitters and 480 receiver channels, which are

located on the eight identical transceiver boards.

The Hull Unit is designed to be lowered 1.0 meters below the

ship’s 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 cylindrical 480-elements transducer allows the sonar beam

to give full 360 degrees coverage of the water volume down to

-60 degrees.

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.