Installation manual

Simrad SP90

851-164510 / Rev.E

3.2 Mounting the trunk

The location of the sonar trunk must be carefully selected.

Note: Note the orientation of the centre line of the trunk with regard to

the mounting bolts.

Note: Remove the gasket on the top flange during welding.

Parallel to the

centre line

(CD16001D)

Figure 3 Orientation of the sonar trunk

The height from the top of the trunk flange, to the underside of

the protection blister, must be as shown in the referenced

figures.

The top flange must be parallel to the construction water-line in

both the fore-and-aft and athwartships directions.

The installation trunk must be welded to a doubling plate which

should be at least 1.5 times as thick as the surrounding shell

plating. The doubling plate’s final dimensions are to be

governed by the approved installation drawings supplied by the

shipyard. The trunk must also be stiffened by welding

knee-plates to it and the doubling plate in both the fore-and-aft

and athwartships directions.