Installation manual

Transducer installation

851-165187 / Rev.A

Common guidelines

The best performance is obtained with a blister height of 40 cm

or more. A streamlined shape and rounded edges reduce the

flow noise. A vertical leading edge or front will guide the

aerated water to the sides of the blister. The orientation of the

blister should follow the water flow.

The interior of the blister must be filled with sea water. Use

drainage holes in the bottom and an air outlet on the top. The

water pressure behind the transducer will then compensate for

the outside pressure during vessel movements in rough sea.

Large diameter transducers must be fitted with a horizontal

U-shaped support bar. This bar can then be secured to the

mounting ring using threaded rods.

The transducer cable penetrates the hull in a stuffing tube. Leave

an adequate loop of the cable behind the transducer for easy

mounting or removal of the transducer.

Toe-in

On a conventional hull shape, without a bulb, the front of the

blister should have a few degrees toe-in towards the bow.

(A) = Keel

(B) = Blister