Kongsberg Simrad MF90, Installation Manual

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94
476671/B
Important
The installation trunk must be secured to the bulkheads and/or the hull by means of
strengthening plates (stiffereners). The dimensions and strength of the plates must be
adequate to prevent any vibrations. This is an invariable requirement to ensure the safety of
the MF90 system and the vessel.
The shape and locations of the strengthening plates must be determined by the installation
shipyard based on the physical properties of the installation trunk, the hull and the space
available. Minimum four strengthening plates must be used. Each strengthening plate must
extend all the way from the bottom to the top of the installation trunk. Only leave a small
gap to allow access to the bolts and nuts used to secure the mounting flange. The minimum
plate thickness is 10 mm, but the classification society can specify other dimensions.
MF94 (Number of holes in the flange: 24)
Procedure
1 Define the physical location of the
installation trunk.
This location must be carefully selected.
The decision must be based on the general
principles outlined in chapter
Preparations
and all relevant knowledge about the vessel
construction.
Note
All information related to practical and
theoretical noise patterns along the hull
must be taken into consideration.
2 Note the orientation of the centre line of the installation trunk with regards to the
mounting bolts.
3 Remove the rubber gasket from the top of the installation trunk to protect it from the
heat.
4 Cut out a hole in the vessel’s hull with a diameter large enough to accommodate the
installation trunk.
The exact size of the hole must be determined by the installation shipyard.
5 Orientate the installation trunk correctly, and then weld it into position.
Observe the installation examples to select the height from the top of the trunk flange
and down to the underside of the protection blister.
Simrad MF90 Installation Manual