Kongsberg Simrad MF90, Installation Manual

Page: 91 / 426

476671/B
89
MF94 Installation example (off keel/without blister)
The illustration demonstrates the mounting principles for a standard trunk.
Note
The drawing is not to scale.
A
Sonar room (watertight compart-
ment)
B Air vent pipe
C
Air vent pipe
D
Access hatch
E Lamp
F
Heater
G
Strengthening knee plates
(stiffereners)
H Installation trunk extension
This is the preferred method if you need
to place the installation trunk on the side
of the keel. Extend the trunk to fit the
shape of the hull.
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.
Related topics
Mounting the installation trunk, page 78
About the installation trunk, page 79
Mounting the installation trunk