G-PILOT 3100 Operation Manual
7-1 The steering parameters
The G-PILOT 3100 has six steering parameters which can be adjusted to optimize steering
Response How far the boat can move off course before the G-PILOT 3100 turns
the rudder to correct the course. A lower response setting means the
boat can move further off course before the G-PILOT 3100 corrects.
To change, go to RESPONSE in the MAIN menu (see section 3-7).
The range is 1 to 10, A1 to A5. A1 to A5 is an adaptive setting where the
autopilot attempts to minimise the number of rudder corections while
maintaining a desired course heading. The adaptive setting eliminates
the need to set the response according to varing whether conditions.
The range is A1 (slower adaption) to A5 (faster adaption).
Ratio The rudder movement required to make a given course change.
To change, go to RATIO in the MAIN menu (see section 3-7). The range
is 1 (smaller corrections) to 10 (larger corrections).
Counter rudder gain Determines how the rudder moves after making a large course change.
To change, go to C-RD GAIN in the OPTIONS menu (see section 3-7).
The range is 1 (low) to 10 (high) and OFF (no counter rudder gain).
Trim gain If the boat encounters a sideways current or wind, then the boat will
move off course sideways. The G-PILOT 3100 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.
To change, go to TRIM GAIN in the OPTIONS menu (see section 3-7).
The range is 1 (low) to 10 (high) and OFF (no counter trim gain).
GPS gain In GPS mode, this determines how much correction is applied to
remove cross track error.
To change, go to GPS GAIN in the OPTIONS menu (see section 3-7).
The range is 1 to 10.
Wind gain In wind mode, this determines how much correction is applied to reduce
any difference between the set wind angle and the actual wind angle.
To change, go to WIND GAIN in the OPTIONS menu (see section 3-7).
The range is 1 to 10.
Ideally, in AUTO or HANDSTEER the G-PILOT 3100 should steer the boat to the course without
the rudder moving too often.
Tip When checking the steering performance of the boat, display course error on the bar data
display (see section 3-3) and check how this changes with time.
7-2 Proﬁ les
The values of the steering parameters required for optimum steering may vary with boat speed,
sea conditions or wind conditions. Generally:
for higher boat speeds, decrease ratio; for lower speeds increase ratio.
for calm seas, increase response; for rough seas decrease response.
for higher and/or more stable winds, increase wind gain; for lower and/or unstable winds,
decrease wind gain.
The steering parameters are adjusted correctly
7 Optimizing steering performance