Simrad PI54 A Specifications Page 41

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Applications
29
850-165186 / Rev.B
Pelagic trawl
When used for pelagic trawling the PI54 system must have one
or more of the following sensors attached to the net: Depth
sensor(s), Bottom Contact sensor, Temperature sensor, Rip
sensor and Catch sensor(s).
The system is designed to be used with up to six sensors. We
recommend that you use a Bottom Contact sensor behind the
footrope, a Depth sensor behind the headrope, two Catch
sensors, a Temperature sensor 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) = Temperature sensor
(F) = (G) = Catch sensors
Using the r ecommended sensors, the PI54 system will provide
the following information:
• Optimal vessel speed with regard to net sink rate and school
location.
• When the codend is full.
• Bottom approximation to avoid net contact.
• Net opening (using two depth sensors) and damage
• Ambient water temperature at gear depth.
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