Installation manual

Simrad PI Catch monitoring system / Trawl hy drophone

851--164472 / Rev.B

Keel mounted shoes

Hydrophones can be keel mounted to avoid creating appendages

to the hull that could foul the purse wire.

Keel mounted hydrophone shoes, top view.

(A) = Keel

(B) = Towards the bow

(S) = Starboard shoe with hydrophone

(P) = Port show with hydrophone

Should this solution be chosen, t he following must be taken into

consideration:

• Hydrophones must have an unobstructed line -of-sight to the

sensors attached to the trawl.

• Hydrophones should be trained 20 degrees to either side of

the vessel’s centre line providing a 10 degree overlap and a

horizontal coverage area of 90 degrees.

• Hydrophones should be mounted as deeply as possible on the

hull, but not so deep that they may be damaged when

docking the vessel.

• For combined purse seine and trawl applications a seine

hydrophone may be mounted in the starboard ( or port)

blister/shoe along with the trawl hydr ophone.