Kongsberg Simrad MF90, Installation Manual

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90
476671/B
MF94 Installation example (off keel/with blister)
The illustration demonstrates the mounting principles for a standard trunk.
Note
The drawing is not to scale.
A
As short a possible
B
795 mm (Maximum)
C 1200 mm (Minimum)
D
40 mm (Approximately)
E
Strengthening knee plates
(stiffereners)
F
Streamlined blister
G
610 mm (Approximately)
H
1200 mm (Approximately)
I Deflection brackets must only
be welded to the shell-plating.
Thickness: 6 mm (Minimum)
The streamlined blister is an option.
The blister may work well on smaller
vessels. This is because it allows you to bring the installation trunk and hull unit down
closer to the keel. A lower position will increase the depth of the transducer relative to the
hull. The circular opening in the blister must have the same diameter as the inside diameter
of the installation trunk.
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.
Simrad MF90 Installation Manual