Applications
23
857-164636 / Rev.A
Bottom trawl
When used for bottom trawling, the PI32 system will give you
all necessary information about the trawl status. You should
have minimum three of the following sensors attached to the
net:
Depth
sensors(s),
Bottom Contact
sensor,
Rip
sensor and
Catch
sensors(s).
The system is designed to be used with up to three sensors. We
recommend that you use a Catch sensor, a Height sensor behind
the headrope and a Spread sensor. Sensor configuration can be
tailored to suite individual needs.
(A) = Depth sensor (headrope)
(B) = Depth sensor (footrope)
(C) = Bottom contact sensor
(D) = Rip sensor
(E) = (F) = Catch sensor(s)
Using the recommended sensors, the PI32 system will provide
the following information:
•
Optimal vessel speed with regard to net sink rate and bottom
approximation.
•
When the codend is full.
•
Footwire/bottom lift-off.
•
Net opening (using two depth sensors) and damage