24
476671/B
Hull Unit
Lowering depth (m)
Transducer cables (m)
Maximum speed
(knots)
4.6
MF90
1.0
10
20
4.6
MF94
2.1
7
19
On some vessels, additional transducer protection is required. One example is vessels
working in arctic conditions. It is important for them to prevent ice from damaging the
transducer. A gate valve is then added to the hull unit installation. By means of a mechanical
construction it shuts off the bottom of the installation trunk when the MF90 system is not
used.
For more information, refer to the end-user documentation provided by the manufacturer.
Important
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.
Related topics
Simrad MF90, page 13
System units, page 20
Installing the hull unit, page 99
Cable layout and interconnections, page 143
Setting to work, page 186
Technical specifications, page 346
Drawing file, page 364
Starting up the hull unit, page 201
Simrad MF90 Installation Manual
Summary of Contents for Simrad MF90
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