AUTONAUTIC INSTRUMENTAL C20 Installatie- en bedieningshandleiding - Pagina 5
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Pagina afdrukken3. MAINTENANCE
Compass Bowl
The compass bowl should be regularly inspected to ensure that there are no leaks or
bubbles. In addition, the upper and lower glass should be maintained in a clean
condition, and the compass gimballing checked.
A few times per year, and more regularly on vessels with high vibration levels or
following heavy weather, an operational test should be carried out on the magnetic
compass to ensure that no friction has developed on the pivot and jewel. This
operational test should be carried out as follows:‐
Whilst the vessel is alongside, bring a magnetic object towards the compass so that the
heading is deviated by 2 degrees. Hold the deviated compass card in this position for
10 seconds, and then release by removing the magnetic object. When the compass
card settles it should be within 15 seconds of arc of the original heading. If the
compass card does not return within this limit then there is a high level of friction
between the pivot and jewel. The compass should be overhauled by a competent
authority.
Binnacle
The C20 Binnacle has one of the simplest periscope arrangements, utilising only
one lens and mirror. The lens is easily removed for cleaning at periodic intervals from
the foreward side of the binnacle.
The only area where maintenance may be required is with the binnacle lighting. There
are two LED lamps within the binnacle, and an additional spare, all accessible by
removing the binnacle.
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