Installation manual

Simrad PI Catch monitoring system / Trawl hy drophone
18
851--164472 / Rev.B
Freestanding hydrophones in blisters
For t rawlers that do not have to take a pursing wire into
consideration, hydrophones can be mounted in specially
constructed blisters offset from the vessel’s keel (preferably
1200 mm, but no less than 700 mm) to avoid turbulence.
The picture shows an example of a freestanding hydrophone
offset from the keel on a wooden vessel.
Approximate blister location, view from stern. All measurements
are approximate, and the drawing is not in scale.
(A) = Outer hull
(B) = Keel
(P) = Port hydrophone blister
(S) = Starboard hydrophone blister