Simrad SP270 Installationshandbuch PDF herunterladen (Seite 49)

Installation procedures

851-160572 / B

Installation of the sonar trunk

Mounting the trunk

The location of the sonar trunk has to be carefully selected, as

described in chapter Location of the hull unit.. Refer also to

figures 4 and 5.

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

the mounting bolts, shown in figure 3.

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

Parallel to

centre line

(CD1883 WMF/GIF)

∝±

∝

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 minimum 920 mm (36 1/4”) as

shown in figures 4 and 5.

The top flange must be parallel to the construction loadline in

the fore-and-aft as well as the athwartships direction.

The installation trunk must be welded to an inserted plate which

should be 1.5 times as thick as the original shell plate. The size

may be determined by the shipyard or the responsible maritime

authorities. The trunk must be stiffened to the inserted plate by

welding knee-plates on the trunk in both fore-and-aft and

athwartships directions.

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Simrad SP270 Installationshandbuch Seite 49