26
GHP 12 Installation Instructions
Category
Setting
Description
Autopilot Tuning > Rudder
Gains
(power boat only)
High Speed Counter Allows you to set the rudder gain counter-correction for high speeds.
This setting applies to the vessel when operating above planing speed.
If you set this value too high, the autopilot may be overactive, attempting to constantly adjust
the heading at the slightest deviation. An overactive autopilot can cause excess wear and
Autopilot Tuning
Acceleration Limiter Allows you to limit the speed of autopilot-controlled turns.
Increase the percentage to limit the turn rate, and decrease the percentage to allow higher
turn rates.
Navigation Setup
Fine Heading
Adjustment
Allows you to set the lubber line (heading offset) for the autopilot.
Navigation Setup > NMEA
Setup
NMEA Checksum
If the connected NMEA 0183 GPS unit incorrectly calculates checksums, you may still be
able to use it if you turn this setting off. When set to off, data integrity is compromised.
Navigation Setup > NMEA
Setup
Reversed XTE
If the connected NMEA 0183 GPS unit sends the incorrect steering direction with the cross
track error signal, use this setting to correct the steering direction.
Navigation Setup
Navigation Gain
Allows you to adjust how aggressively the autopilot eliminates cross-track error while
following a Route-To pattern.
If this value is too high, the autopilot can oscillate back and forth across the course line over
long distances.
If this value is too low, then the autopilot may respond slowly in eliminating cross-track error.
Navigation Setup
Navigation Trim
Gain
Allows you to adjust the acceptable amount of long term cross-track error while following a
Route-To pattern. Only adjust this setting after the navigation gain has been set.
If this value is too high, the autopilot will overcompensate for cross-track error.
If this value is too low, the autopilot will allow a large long term cross-track error.
Steering System Setup
Shadow Drive
Connected
This setting lets the system know if a Shadow Drive (optional) is connected or not. (
Steering System Setup
Verify Steering
Direction
This setting tells the autopilot which direction the rudder must move to turn the vessel to port
and to starboard. You can test and reverse the steering direction if necessary.
Steering System Setup
Drive Unit Class
Allows you to specify the class of your drive unit (refer to
for more
information).
Select Other for non-Garmin drive units.
Steering System Setup >
Drive Unit Class > Other or
Solenoid
Drive Unit Voltage or
Solenoid Voltage
Only applicable if the Drive Unit Class has been set to “Other” or “Solenoid”.
This setting tells the autopilot the voltage it should supply to the drive unit motor. Refer to the
documentation supplied by the manufacturer of your drive unit to determine motor voltage
specification.
An incorrect setting can cause damage to your drive unit motor.
Steering System Setup >
Drive Unit Class > Solenoid
Bypass Valve Voltage Only applicable if the Drive Unit Class has been set to “Solenoid”.
This setting tells the autopilot the voltage it should supply to the solenoid bypass valve. Refer
to the documentation supplied by the manufacturer of your solenoid drive to determine the
bypass-valve-voltage specification.
An incorrect setting can cause damage to your solenoid drive.
Steering System Setup >
Drive Unit Class > Other
Max. Current
Threshold
Only applicable if the Drive Unit Class has been set to “Other”.
This setting tells the autopilot the maximum amount of current it can supply to the drive unit
motor.
Refer to the documentation supplied by the manufacturer of your drive unit to determine motor
current specification.
An incorrect setting can cause damage to your drive unit motor.
