Kongsberg Simrad MF90, Installation Manual

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476671/B
Important
The MF90 is an advanced product. It is used with other advanced products. There is
important information that you need to know.
Watertight integrity
The size, location and design of the sonar room must fulfil all the requirements to the
vessel’s watertight integrity.
In the event of a major leak, it must be possible to close all watertight hatches and/or doors
to the room to maintain vessel stability and safety. The physical size of the sonar room must
be limited, so that in the event of a major leak, the flooding of the room will not induce
instability, or cause the vessel to capsize or sink.
For more information, see Sonar room requirements .
Mechanical support of the installation trunk
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.
Mechanical support of the hull unit gantry
The hull unit gantry must be secured to the bulkhead by means of mechanical support
brackets. The dimensions and strength of the support brackets must be adequate to prevent
vortex induced vibrations. This is an invariable requirement to ensure the safety of the
MF90 system and the vessel.
We recommend that support brackets are placed pointing at minimum three directions with
approximately 120 degrees between them.
The mechanical support brackets must be designed and manufactured by the installation
shipyard to fit the complete installation in the sonar room. All calculations made to support
the design must meet the applicable safety requirements, and apply to the physical properties
of the complete installation.
Simrad MF90 Installation Manual