Installation manual

Simrad SP70

850-164186 / Rev.D

In addition to the Omni picture, the vertical slice is especially

useful for visualizing the vertical distribution of a school of fish.

In that way, it is not necessary to go over the target to see the

distribution on the echo sounder, which often results in a

spreading of the school.

For the optional 90 degrees tilt version, the Omni/Vertical

combination is used in several display modes to give the best

situation overview for both purse seiners and trawlers. In these

presentations the seine net and the trawl can be seen in relation

to the vessel, the school of fish and the bottom.

Stabilization system

When the beam stabilizer is activated, both horizontal and

vertical beams will be stabilized electronically for roll and pitch

movements up to 20 degrees. The beam direction will then

change continuously according to the vessel’s movements, and

secure an optimal contact with the targets even in rough seas.

Stabilization

system

Reception

A great effort has been made to reduce unwanted noise to get a

clean and stable echo presentation. To achieve this goal the

sonar receiver has the following filtering possibilities:

FM Correlation filter

In addition to the traditional single frequency transmitting

method, the SP70 sonar is equipped with an FM correlation

mode.