Catch monitoring brochures - Simrad

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Effective trawling with Simrad PI32...

Pelagic trawling

Simrad PI32 gives a new dimension to trawling where new sensor design, combined with new signal processing technology can achieve more efficient trawling. You can choose from the variety of sensors to build the trawl system that will give you the information required.

The PI32 catch sensor will indicate when a pre-determined tonnage of fish is caught in the cod end. The bottom contact sensor for trawlers is extremely important to help keep the trawl on the bottom, to avoid fish escaping under the rollers.

For a pelagic trawl, the new bottom sensor will sound an alarm when the foot marine rope is too close to the bottom.

1.1

1«

Pelagic system with depth, bottom and catch sensor. The depth is 28 meters, no bottom contact and the catch sensor is not triggered. The headrope is indicated on the echosounder recording and the trawl height is entered manually.


	Cl II		1 124
	■1		62
	•		11

The Simrad PS30 Sensor is designed to withstand the extreme forces and the rough environment around

the rollers on a bottom trawl.

Three catch indicators are in use. Sensor 1 and 2 are triggered indicated in red. Sensor 3 is still not activated.

Bottom trawling ii ii i ^^^^^^M

PI32 TRAWLING CONFIGURATION

52.3 7a

NMEA INTERFACES EXTERNAL ALARM


		Y V V	7
			19

OPTION: TRANSDUCER DEPTH TEMPERATURE SPEED

HYDROPHONES

Trawl system with depth, bottom and catch sensor.

The depth is 52.3 meters, the bottom sensor indicates no bottom contact and the footrope has been off bottom for 7 minutes. The catch sensor has been activated for 19 minutes.