540
CONTROL STATION
Studio ti 03312 540-04usa
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6.2.4 SECTION D - Magnetic compass
A magnetic compass fitted on the dashboard of a yacht is inevitably close
to the magnetic fields produced by the electric and electronic systems on
board. This condition is called “variation”. Only a skilled technician should
set the compass to correct the variation and supply an accurate deviation
schedule. This procedure is called “compass compensation” or “compass
setting”.
Compensate the compass after the yacht launch or when replacing it, in
order to eliminate possible mistakes due to the compass position.
Do not approach the compass to steel or iron objects or objects made of
other ferrous materials (e.g. tools, wrenches, batteries, etc.). The ferrous
materials close to the compass alter the readings and make them
unreliable. Remove any unnecessary object near the compass.
NOTICES
The compass delivered with the yacht is not compensated for change
or deviation. Any electrical or metallic item located in its proximity may
influence the compass. The yacht’s owner is responsible for the
compass compensation. Compensation should be carried out after
installing additional electronic equipment or once a year after a
prolonged period of mooring or ground lay-up. Compensation should be
carried out only by authorized and qualified personnel.
As a compass can rarely be set to zero variation on all courses, the
technician in charge of its compensation should give you a card
containing the corrections to be applied to navigation calculations.
Always keep this card available on the main control station.
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