Simrad AP28, Operator'S Manual

Page: 95 / 126

Setup at installation | 95
Autotrim standard value is 40 seconds which should
work well on most boats.
On boats operating on VRF it should be set to 20 seconds
Rate Limit should be kept at 6.0°/second unless there is
a need for more rapid response in turns.
Minimum rudder
Some boats may have a tendency of not responding to
small rudder commands around the “course keeping”
position because of a small rudder, a rudder deadband,
whirls/disturbance of the water-stream passing the
rudder or it is a single nozzle water jet boat.
Turning the Minimum Rudder function ‘On’, may improve
the course keeping performance on some boats, but will
increase the rudder activity.
During the seatrial, only set Minimum Rudder to ON if it
proves to give a better course keeping performance in
calm sea. It should be set after the Autotune has been
performed and a possible fine tune of the Rudder
parameter (page 94).
Correct setting of counter rudder,
ideal response
New course
Counter rudder setting too high, sluggish
and creeping response
New course