Garmin G3X Touch Pilot’s Guide190-01754-00 Rev. E245AFCSSystemOverviewFlightInstruments EISCNSInterfaceGPSNavigationFlightPlanningHazardAvoidanceAdditionalFeatures AFCS Annun/Alerts Appendix IndexAFCS CONTROLSGMC 305 AFCS CONTROLSThe GMC 305 AFCS Control Unit has the following controls:1 HDG Key Selects/deselects Heading Select Mode2 NAV Key Selects/deselects Navigation Mode. Cancels GS Mode ifLOC Mode is either active or armed. Cancels GP Mode ifGPS Mode is either active or armed. Cancels LOC Modeif GPS Mode is active and LOC Mode is armed.3 AP Key Engages/disengages the autopilot4 LVL Key Engages the autopilot (if the autopilot is disengaged) inlevel vertical and lateral modes5 NOSE UP/DNWheelAdjusts the vertical mode reference in Pitch Hold,Vertical Speed, Indicated Airspeed, and Altitude Holdmodes6 IAS Key Selects/deselects Indicated Airspeed Mode7 ALT Key Selects/deselects Altitude Hold Mode8 VNV Key Selects/deselects Vertical Path Tracking Mode for VerticalNavigation flight control9 VS Key Selects/deselects Vertical Speed Mode10 YD Key (if installed) Engages/disengages the yaw damper11 FD Key Activates/deactivates the flight director onlyPressing once turns on the director in the default verticaland lateral modes. Pressing again deactivates theflight director and removes the Command Bars. If theautopilot is engaged, the key is disabled.12 APR Key Selects/deselects Approach Mode
