4-12
Bottom Flange hull mounting procedures
The Bottom Flange must first be welded into a hole cut in the ship’s bottom hull.
1. Cut a circular hole (diameter 250mm +10/–0mm) at the selected Transducer position.
Hole cut in Ship's Hull
Positioning Bottom Flange flush with hull outside
Notes:
x IT IS IMPORTANT that the outer (bottom) surface of the flange is flush with the
hull and exactly vertical/perpendicular and horizontal in a flat area of the hull
underside.
For this kind of installation there is no direction requirement (longitudinal or
transverse) of the flange. Disregard any markings (red dot/groove) on the flange.
The markings are intended for other purpose and are not used here.
x Welding work shall be carried out by qualified personnel as required by the
applicable classification society.
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