TMQ Bosun-AP9, Operation And Installation Manual

Page: 18 / 63

TMQ Bosun - AP9 Rev1 (935) Page 18 16/06/2003
Counter-Rudder
In some vessels, changing course requires a large
amount of rudder to be applied initially, and then a
smaller amount of rudder in the REVERSE direction to
stop the vessel from swinging beyond its desired course.
This is called
counter-rudder .
The Bosun autopilot has this feature built-in. A
counter-rudder setting of "1" gives no counter-rudder steering, suitable
for light and manoeuvrable vessels. If you find your ship over-steering
when under autopilot control, increase the counter-rudder setting by a
couple of steps, and see if the next course change behaves better.
Once the correct setting is found for your vessel, it should not need to be
changed.