Transducer installation
183
857-164342 / Rev.C
Retractable transducer
Retractable hull units 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 having a hull where it is difficult or impossible to install
a blister, it may be worth-while. A retractable hull unit with
transducer is shown below.
Vessels without a keel and with a wide, flat 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.
Transducer
(CD1999)
Keel
Hull
unit
Figure 25 Retractable hull unit with
transducer
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