Simrad Simrad SP70, Installation Manual

Page: 43 / 230

Installation planning
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In the sonar room, the air inlet should be located in close to the deck
and the outlet as high as possible. A funnel shaped drip-collector
should be mounted below the vent pipes to divert moisture to the
bilge.
On the main deck, the best ventilation is provided when the outlet
pipe is at least four meters higher than the inlet pipe. To keep out
sea water, rain and spray, the ventilation pipes should be fitted with
goosenecks of the equivalent.
Conduit
If the cable between the wheelhouse and the sonar room passes
through hatches or areas where it may be damaged, it should be run
through a conduit (two inch conduit is recommended).
Air vent pipe
An air vent conduit with a minimum of 10 mm internal diameter
must be attached to the air bleeding cock on the Hull Unit. The pipe
should be laid with with continuous rise to free air on deck or
through the ship’s side.
Note
Through-hull modifications are subject to approval by the vessel’s
national registry and corresponding maritime authority. The
shipowner and shipyard are responsible for obtaining installation
approval.
Bilge pump
The sonar room should be connected to the vessel’s bilge pump
system. If this is not possible, a separate bilge pump for the sonar
room must be installed.
Lighting
The sonar room should be equipped with suitable lighting to
simplify the installation and aid future maintenance.
Dry docking
Make sure that ample space is provided between the vessel and dry
dock for system installation. To facilitate future dry docking, mark
the position of the installed trunk as indicated.
→
Refer to figure 2 on page 24.
Decking
Once the installation has been completed, the sonar room should
be suitably decked without restricting access to the equipment.