Simrad ITI User Manual download pdf (Page 12)

Simrad ITI

857-164777 / A

The figure above shows that the trawl is 3_ off port side. The doors

and the clump are not lined up correc tly with door/clump di stances

of 28 and 30 meter. The distances to the trawl doors are 310 and

309 meter and distance to the clump is 307 meters. In order to

obtain maximum door spread and a square tow, the middle wire

should be paid out 1.3 m eter.

Note The trawl geometry is compared to the course over ground showing

with 90

being optimum.

Both trawl heights are 3,2 meter and the Trawl Eye echogra m

shows that the port trawl has good bottom contact but for the

moment, with a few fishes in t he opening. One Catch Sensor i s

mounted on the port cod end. The trawl is 6:20 min. behind the

vessel, the clump has a light bottom contact ascending 0,4 m/min.

Depth below the vessel is 120 meter and the temperature at the

trawl is 5,8_ C. In addition, heading, speed and Lat./Long. are

displayed.

The ITI Geometry for Twin Rig will be implemented in the ITI

topside software, version 5.20 or above.

(Cd6 893)

The picture shows a Twin Rig trawl with the Trawl Eye e chogram

showing the trawl opening.

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Simrad ITI User Manual Page 12