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81131_7.book Page 21 Wednesday, March 17, 2004 3:59 PM
Chapter 3: Advanced Operation 21
Initiating a dodge maneuver
In Track mode, you can make a dodge maneuver by using the course change keys ( -1 , +1 , -10 or +10 ) to select the desired course change.
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.
Note: Provided the boat remains within 0.1 nm of track, you do not need to steer back towards the track.
Safety in Track mode
WARNING:
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.
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