Chapter 3: Installation 15
• Be as near as possible to the centre line of the vessel.
• Be clear of other through-hull fittings or projections.
• Have sufficient clearance inside the hull to fit the nut.
• Have 100 mm (4 in) of headroom to allow for withdrawal.
In addition to the above requirements, the depth transducer must be
mounted within 10
0
of the vertical, forward, aft and athwart ships.
Instrument
CAUTION:
The presence of moisture at the rear of the instrument could cause
damage either by entering the instrument through the breathing
hole or by coming into contact with the electrical connectors.
ST60 instruments can be fitted either above or below deck, provided the
rear of the instrument is sited where it is protected from contact with water.
Each instrument must also be positioned where:
• It is easily read by the helmsman
• It is protected against physical damage
• It is at least 230 mm (9 in) from a compass
• It is at least 500 mm (20 in) from radio receiving equipment
• There is reasonable rear access for installation and servicing
10˚ maximum
Maximum transducer angle
D4350-3
81040_1.book Page 15 Thursday, November 7, 2002 10:21 AM
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