NorthStar Navigation Pilot System NS3300 - Manual (Page 43)

43
Reference Manual
Increase trim gain
Decrease trim gain
1 minute
1 minute
a Boat takes much more than one minute to trim
Sideways force starts
b Boat takes much less than one minute to trim
Sideways force starts
Problem: boat oscillated around GPS course
Decrease GPS gain.
Increase GPS gain.
Problem: drifts off GPS course
or
or
Problem: after a sideways current or wind, the correction is applied too quickly or too slowly
If the boat encounters a sideways force, then it will move off course sideways. The Pilot will automatically
bring the boat back to the correct heading by applying a few degrees of rudder, called trim. Trim gain sets how
quickly the trim is applied. Trim gain should be adjusted to trim the boat in about one minute. Getting the Trim
gain setting right can be difficult for your specific boat and it is easy to alter the Trim gain too much. Change
the settings slowly and conservatively at first, until the right settings are known.