Simrad AP25 - Manual (Page 20)

Simrad AP25 Autopilot
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20221495F
2.3 AP25 with MSD50 Stern Drive unit
Note ! The information in section 2.3 only applies if your autopilot is
driving a Simrad MSD50 Stern Drive.
The MSD50 Stern drive unit has a relative feedback signal which
needs a zero point setting after the autopilot has been turned on.
Refer to the MSD50 manual for further information.
Zero point setting
Note ! If you do not need a rudder angle display when leaving the dock,
just steer the boat manually on a straight course and press the
AUTO button. The zero point is then set automatically.
If you prefer to use the rudder angle display when leaving the
dock, proceed as follows:
After turn on the rudder angle
display will alternate between
10 degrees port and starboard
to indicate that the "rudder"
zero point need be set.
Use the wheel to bring the "rudder" to midship position. Turn the
wheel from lock to lock (H.O. to H.O.) and count the exact number
of turns. Then start from one lock position and turn the half number
of turns.
Press AUTO and then STBY. The zero point is now set and the
display will show:
Follow the operating
instructions on the following
pages. There is no further need
for zero point settings until
next time you turn the
autopilot on.