Safety in track mode, Confirming position at the start of a journey, Verifying computed positions – Raymarine autopilot User Manual
Page 35: Plot frequency
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ST6001+ Autopilot Control Unit - Owner’s Handbook
Safety in Track mode
CAUTION:
Track mode provides accurate track keeping even in complex
navigational situations. However, it is still the skipper’s
responsibility to ensure the safety of their boat at all times
through 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.