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81183_2 S8.book Page 18 Tuesday, May 6, 2003 9:08 AM
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Section 8: Autopilots
Cancelling a dodge maneuver
After you have avoided the hazard, you can cancel the dodge course
change by making an equal course change in the opposite direction.
Safety in Track mode
WARNING:
Although Track mode provides accurate track keeping even in
complex navigational situations, it is still the skipper’s responsibility
to ensure the safety of the boat at all times by means of careful
navigation and frequent position checks.
Sailing in Track mode assists precise navigation and removes the tasks of
compensating for wind and tidal drift. However, you MUST still
maintain an accurate log with regular plots.
Confirming position at the start of a journey
At the start of a journey you must always use an easily identifiable fixed
object to confirm the fix given by the navigation system. Check for fixed
positional errors and compensate for them.
Verifying computed positions
Always verify the computed position with a dead reckoned position,
calculated from the average course steered and the distance logged.
Plot frequency
In open water, you should make plots at least every hour.
In confined waters or when near to potential hazards, you should
make plots more frequently.
2.8 Using Wind Vane mode – sail boats
Introduction
Note: To use Wind Vane mode, the autopilot must receive suitable wind
information.
When the autopilot is in Wind Vane mode it keeps the boat at a set angle
to the wind, using wind and compass references.
ST290 Instrument System Owner’s Handbook