Kongsberg Simrad AP20 Manual page 102

Simrad AP20 Autopilot
Recommended speed during Autotune varies with the type of
boat, but should not exceed 10 knots. Autotune should not be
performed at planing speed!
For displacement boats use a speed that is approximately half the
normal cruising speed (i.e. if cruising speed is 10 knots, do the
Autotune at about 5 knots).
The parameter values calculated during Autotune becomes the
LO
automatically set to 66% of the LO.
If possible it is recommended to perform the Autotune steering
East or West, as this will yield the best balanced parameters.
WARNING ! The Autotune function will take control of the boat and
perform a number of S-turns. It must always be performed
in open waters with sufficient safe distance to other traffic.
The Autotune function may take from 1 to 2 minutes to
complete.
Activate the AUTOTUNE, by rotating the course knob
clockwise. The display will flash "Automatic tuning".
After the Autotune has been completed the rudder must be
controlled manually, as the mode is returned to STBY.
When the Autotune has been completed, there should normally
be no need for further adjustments. On certain installations,
however, you may want to "fine tune" the parameters after the
Autotune due to the special steering characteristic of a specific
boat. Viewing or changing the Autotune parameters are done
from within the VIEW PARAMETERS menu item.
Exit the Seatrial menu by pushing STBD [>] button to proceed
to the Parameters menu, or press STBY to return to normal
AP20 operation.
100
speed parameters.
Seatrial
Set Rudder zero
Compass
calibration
Compass offset
Heading
Automatic tuning
The HI speed
Set Rudder zero
00
Compass
calibration
+002
Compass offset
347
Heading
Automatic tuning
Confirmed
No
Yes
parameters are
Seatrial
00
+002
347
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