Furuno SEARCHLIGHT CH-250 - Manual (Page 16)

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1.2 Transceiver Unit
1.2.1 General mounting considerations
•
The mounting location should be well ventilated and dry.
•
The unit can be mounted on bulkhead or the deck.
•
Secure the maintenance space shown in drawing below for ease of maintenance and
service.
•
The maximum cable length between the transceiver unit and the raise/lower drive unit cable
is 50 m.
•
The maximum cable length between the transceiver unit and the monitor (interface) unit is
10 m.
1.2.3 Mounting method
Fasten the transceiver unit with four tapping screws (5X20, local supplied).
For bulkhead mounting, tighten upper tapping screws so there is 5 mm clearance between
bottom of screw head and bulkhead, and screw slots of the unit. Then fasten lower screws.
1.3 Hull Unit
1.3.1 General mounting considerations
•
Noise and air bubbles will affect performance.
•
Do not turn on the equipment with the transducer exposed to air. Exposing the transducer to
air may damage it.
1.3.2 Installation position considerations
Discussion and agreement are required with the dockyard and ship owner in deciding the
location for the hull unit. When deciding the location, take into account the following points:
•
Select an area where propeller noise, cruising noise, bubbles and interference from
turbulence are minimal. Generally, the point at 1/3 to 1/2 of the ship’s length from the bow or
near the keel is the best. On-the-keel installation is advantageous for minimizing oil
consumption in comparison with of-the-keel. If the hull unit cannot be installed on the keel,
the center of the retraction tank should be within 1 meter of the keel to prevent a rolling
effect.