Kongsberg Simrad MF90, Installation Manual

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476671/B
51
Choosing the best location for the hull unit
Topics
About the hull unit location, page 51
Defining the fore and aft location of the hull unit, page 52
Defining the athwartships location of the hull unit, page 53
Installation with more than one hull unit, page 53
Installation close to echo sounder transducer(s), page 54
Important considerations related to noise, page 55
About the hull unit location
Selecting the best possible location for the hull unit is of vital importance for the overall
sonar performance. The location of the hull unit must be selected by a skilled naval architect
or engineer with experience in sonar theory and hull unit installation. Kongsberg Maritime
can assist if required.
The information here must be considered as general advice. Each installation must be
handled separately depending on the hull design.
The sonar room is the compartment in which the Hull Unit is installed. Other system
units may also be installed in the sonar room.
The physical location of the hull unit depends on the vessel's design and construction,
how the hull is shaped, and how the water runs along the hull. Observe the following
considerations:
1 The sonar room must be accessible under all conditions at sea or at a berth.
2 The size of the hatch must allow the entire hull unit to be removed without being
disassembled.
3 Heating is an effective method for reducing humidity. The heater in the sonar room must
be dimensioned to maintain the equipment within its environmental tolerances. Typical
heating power is minimum 1000 W. The heater must be installed close to the deck.
4 If it is not possible to connect the sonar room to the vessel's bilge pump system, a
separate bilge pump for the compartment must be installed.
5 The sonar room must be connected to the vessel's ventilation system to ensure a supply
of cooling air. If the vessel is likely to operate in tropical conditions, an air dehumidifier
is strongly recommended to reduce the likelihood of corrosion due to condensation.
Preparations