Kongsberg Simrad SN90, Installation Manual

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381298/C
47
Sonar room requirements
Observe minimum requirements to obtain suitable working conditions for SN90
installation, use and maintenance.
The “sonar room” is the compartment in which the Transceiver Unit is installed.
Topics
Environment, page 47
Watertight integrity, page 47
Size and access, page 48
Insulation, heating and ventilation, page 48
Electrical installations, cables and communication, page 49
Bilge pump and decking, page 50
Environment
The SN90 cabinets must be installed in a dry and dust-free environment. The cabinets
are not fully protected against humidity, dust or water.
Observe the environmental specifications related to the SN90 cabinets.
Watertight integrity
The size, location and design of the sonar room must fulfil all requirements to the
vessel’s watertight integrity.
In the event of a major leak in the sonar room, it must be possible to close all watertight
hatches and/or doors to the sonar room to maintain the 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 sonar room will not induce instability, or cause the vessel to
capsize or sink.
Ensure that all watertight decks and bulkheads are inspected periodically to verify that
there are no unprotected openings or improper penetrations that will allow progressive
flooding from the sonar room, and that the watertight doors and hatches are in place and
in working order.
Ensure bilge high level alarms are arranged to provide the earliest warnings of abnormal
accumulation. The high level bilge alarms must be set as low as possible to the deck
or bilge well and positioned along the centre area of the compartment or in a location
at which the fluids will gravitate to first.
All cables leading in and out of the sonar room must be run in steel conduits. These steel
conduits must reach up and above the freeboard deck.
Preparations