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Mounting the installation trunk, page 78
Verifying the quality of the installation
Once the installation trunk and blister have been installed, a quality inspection must take
place. The purpose of the inspection is to makes sure that the installation trunk has been
installed correctly, and that the hull unit can be mounted on top of it.
Prerequisites
Neither tools nor instruments are required.
Context
The installation trunk must be mounted so that it remains vertical during normal operating
conditions.
The top mating surface of the installation trunk must be protected with a blind flange or
wooden cover at all times until the hull unit is installed. It is very important that this surface
is clean and undamaged. It must be watertight after the hull unit has been installed.
Objects protruding from the hull will generate turbulence and flow noise. This will reduce
the overall performance of your system. Protruding objects may be zinc anodes, transducers
or even the vessel's keel. Holes and pipe outlets are also important noise sources, as well
as rough surfaces caused by bad welding. Even traces of sealing compound, sharp edges,
bolts or empty bolt holes will create noise.
Procedure
1
Write down the key measurements.
This is for future reference.
• Horizontal distance from the keel to the centre of the installation trunk
• Height from the bottom of keel to the top of the installation trunk
• Total height of the installation trunk (with optional blister)
Simrad MF90 Installation Manual
Summary of Contents for Simrad MF90
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