Installation manual

Simrad SH80
30
851--164300 / C
3SONARTRUNK
3.1 Mounting of the trunk
The location of the sonar trunk must be carefully selected.
Refer to the Installation planning information on page 23.
Note Note the orientation of the centre line of the trunk with regard t o
the mounting bolts. Remove the gasket on the top flange during
welding.
Figure 5 Orientation of the
SH80 sonar trunk
Parallel to
centre line
(CD1977)
α
α±
1
The height from t he top of t he trunk flange, to the underside of the
protection blister, must be as shown in the referenced figures.
Refer to figures 6 and 7 on pages 33 and 34.
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 t hick 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.