Simrad AP28 Operator's Manual page 79

Steer to wind
Wind steering is only available if 'Boat type' is set to 'Sail'
in the Installation menu.
The 'Minimum wind angle' is the minimum apparent wind
angle that will keep the sails well shaped and give an
acceptable thrust. This parameter will vary from boat to
boat.
The 'Minimum wind angle' applies for the tack-prevent
function. It also applies when the autopilot is operating in
Wind mode.
NAV
You can select different minimum wind angles for port
and starboard. The difference between port and
starboard will be taken into account when calculating the
Distance To Turn (DTT).
Range Change per step Default Units
15 - 90 1 30 °
Steer to navigator
In NAV mode, when the required course change is more
than the set limit, you are prompted to verify that the
upcoming course change is acceptable. The limit is
adjustable.
Setup at installation | 79