B&G Vulcan Series, Руководство оператора

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The time to make a gybe is determined by the speed of the boat to
make it as quick as possible within control.
Tack and gybe prevent
You should use the autopilot with care when beating and running.
If the sails are unbalanced when beating, yaw forces from the sails
can drive the boat into the wind. If the boat is driven beyond the set
minimum wind angle, the thrust from the sails suddenly disappears
and reduces the boat speed. The boat becomes more difficult to
steer as the rudder becomes less effective.
The tack prevent function in WIND mode has been implemented to
avoid such situations. It reacts immediately when the apparent wind
angle becomes 5° less than the set minimum wind angle, and more
rudder is commanded.
When running, it is difficult to steer the boat with waves coming
sideways or from behind. The waves can yaw the boat into an
unwanted gybe; this can be hazardous for both the crew and the
mast.
The gybe prevent function is activated when the actual apparent
wind angle becomes greater than 175° or gets opposite to the set
wind angle. More rudder is commanded to prevent an unwanted
gybe.
The tack and gybe prevent functions are not a guarantee against
getting into a hazardous situation. If the effect of the rudder and/or
drive unit is not adequate, a dangerous situation may occur. Pay
particular attention in such situations.
WIND Nav mode
Ú
Note:
The
WIND Nav
mode is only available if the system has
been set up for boat type Sail. This mode is not available for
NAC-2 or NAC-3 autopilot computers.
In WIND Nav mode the autopilot steers the boat given both wind
and position data.
In this mode the autopilot calculates the initial course change
needed to navigate towards the active waypoint, but the pilot also
utilizes the current wind direction in the calculation.
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Autopilot | Vulcan Series Operator Manual