Simrad ITI Instrukcja Użytkownika Pobierz pdf (Strona 11)

Instruction manual

857-164777 / A

3 ITI GEOMETRY FOR TWIN RIG

Setting up a three wire Twin Rig system isa question of finding the

balance point between a number of forces. The adjustment of the

centre warp is very critical. This is one of the reason for the

positioning of the clump, and hence the balance of forces between

the doors and the warp and sweeps be ing so critical to get a square

tow.

• The ITI Geometry System provides the skipper with c rucial

informationtoadjust the TwinRigcorrectlyandhenceoptimise

the efficiency of both trawls during t he tow.

The ITI Geometry System is based on measurements of the

distance from the vessel to both trawl doors and to the clump. In

addition, the distances between each door and the clump are

measured based on transponders attached to the clump. Based on

these range mea surements, the geometry of the Twin Rig is

calculated with high accuracy since all measurements are relative

to each other.

1.3

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(C d6891)

Theclumpposition relative toa straightline betweenthe doorswill

affect the geometry of the trawl. To get a square tow, the deviation

from the straight line position should be close to ze r o.

This is a focus point for the ITI Geometry System. In addition, the

angle between the true course over ground (VTG) and the straight

line between the doors are calculated and displayed.

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Simrad ITI Instrukcja Użytkownika Strona 11