14 | ST40 Compass Instrument Owner’s Handbook |
The Fluxgate Compass transducer must also be sited:
•At least 0.8 m (2 ft 6 in) away from the vessel's steering compass to avoid deviation in both compasses.
•On a bulkhead below deck.
Note: On steel vessels the Fluxgate Compass transducer can be mounted above deck. When mounted above deck, performance may be impaired due to increased motion.
•To allow reasonable access for installation and servicing.
•Away from any equipment or other installation which may shield the transducer or otherwise disturb the earth’s magnetic field, e.g. large ferrous or magnetic items, engines, communications equipment or cabling.
•On a vertical mounting surface. Where necessary, make up a suitable nonferrous wedged packing piece to provide the necessary vertical surface.
Instrument |
|
|
|
|
| 55 mm | 70 mm |
|
| (2.2 in) | (2.8 in) |
ST40 |
|
|
|
126 mm (5.0 in) |
| 30 mm (1.2 in) |
|
|
| minimum cable clearance | |
| 21 mm | 17 mm |
|
Instrument dimensions | (0.8 in) | (0.67 in) | |
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.
Each instrument must be positioned where:
•It is easily read by the helmsman or navigator
•It is protected against physical damage
•It is at least 230 mm (9 in) from a compass
•There is reasonable rear access for installation and servicing
•The rear of the instrument is protected from water.