Simrad AP28 Operator's Manual page 44

reduces the boat speed. Hence the boat will be more
difficult to steer because the rudder will become less
effective.
The tack prevent function in WIND mode has been
implemented to avoid such situations. It will react
immediately when the apparent wind angle becomes 5°
less than the set minimum wind angle, and more rudder
will be commanded.
When running, it is difficult to steer the boat with waves
coming sideways or from behind. The waves may yaw the
boat into an unwanted gybe; this can be hazardous for
both the crew and the mast.
The gybe prevent function will be activated when the
actual apparent wind angle becomes greater than 175° or
gets opposite to the set wind angle. More rudder will be
commanded to prevent an unwanted gybe.
44 | Operation
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, it may happen. Pay particular
attention in such situations.