Simrad ES60 - DATASHEET REV A, Руководство по установке, Страница: 137 / 162

Transducer Installation
Retractable transducer
Hull units allowing the transducer to be lowered and hoisted are
commonly used for horizontal looking sonars. When not in use,
the transducer is retracted into a trunk.
The retractable hull unit is more expensive than a blister, but on
vessels with a hull where it is dif fi cult or impossible to install a
blister, it may still be worth while. The principles of a hull unit
with a retractable transducer is shown below.
Vessels without a keel and with a wide,
fl at bottom is an example
where a retractable hull unit can be the only acceptable method
for bringing the echo sounder transducer below the boundary
layer.
(CD017012E)
B
E
C
D
A
(A) = Transducer
(B) = Trunk
(C) = Transducer shaft
(D) = Transducer shaft sleeve
(E) = Keel
304699/A
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