Garmin GHP 20 Marine Autopilot System for Yamaha Helm Master Installation Inst - Page 16

NMEA 0183 Information When connected to optional NMEA 0183-compatible devices, the GHC 20 uses the following NMEA 0183 sentences. Type Receive Transmit Sentence wpl gga grme gsa gsv rmc bod bwc dtm gll rmb vhw mwv xte hdg GHP 20 Configuration Settings Although all of the configuration is typically completed automatically through the wizard, you can manually adjust any setting (page 13). NOTE: Depending upon the configuration of the autopilot, certain settings may not appear. Category Speed Source Setup Setting Verify Tachometer Speed Source Setup Planing RPM Speed Source Setup Low RPM Limit Speed Source Setup High RPM Limit Description Allows you to compare the RPM readings on the GHC 20 with the tachometers on the dashboard of your boat. Allows you to adjust the RPM reading on the GHC 20 at the point your boat transitions from displacement to planing speed. If the value does not match the value on the GHC 20, use the arrows to adjust the value. Allows you to adjust lowest RPM point of your boat. If the value does not match the value on the GHC 20, use the arrows to adjust the value. Allows you to adjust the highest RPM point of your boat. If the value does not match the value on the GHC 20, use the arrows to adjust the value. Category Rudder Gains Rudder Gains Rudder Gains Rudder Gains NMEA Setup NMEA Setup Setting Low Speed Gain Low Speed Counter High Speed Gain High Speed Counter Description Allows you to set the rudder gain for low speeds. This setting applies to the vessel when operating below planing speed. If you set this value too high, the autopilot may be overactive, attempting to constantly adjust the heading at the slightest deviation. Allows you to set the rudder gain counter-correction for low speeds. This setting applies to the vessel when operating below planing speed. If you set this value too low, the autopilot may overshoot the desired heading on turns. If you set this value too high, the autopilot may be slow to complete turns. Allows you to set the rudder gain 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. 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 low, the autopilot may overshoot the desired heading on turns. If you set this value too high, the autopilot may be slow to complete turns. 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. Reversed XTE If the connected NMEA 0183 GPS unit sends the incorrect steering direction with the cross track error signal. You can use this setting to correct the steering direction. 16 GHP 20 Installation Instructions