Garmin GHP 12 Autopilot System Installation Instructions - Page 26

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 tear on the drive unit (page 18). 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 NMEA Checksum Setup 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 Reversed XTE Setup 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 Steering System Setup Steering System Setup Steering System Setup > Drive Unit Class > Other or Solenoid Steering System Setup > Drive Unit Class > Solenoid Steering System Setup > Drive Unit Class > Other Shadow Drive Connected This setting lets the system know if a Shadow Drive (optional) is connected or not. (page 6) 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. Drive Unit Class Allows you to specify the class of your drive unit (refer to www.garmin.com for more information). Select Other for non-Garmin drive units. Drive Unit Voltage or Only applicable if the Drive Unit Class has been set to "Other" or "Solenoid". Solenoid Voltage 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. 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. 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. 26 GHP 12 Installation Instructions