Garmin G3X Touch Pilot’s Guide 190-01754-00 Rev. E264AFCSSystemOverviewFlightInstrumentsEISCNSInterfaceGPSNavigationFlightPlanningHazardAvoidanceAdditionalFeaturesAFCSAnnun/AlertsAppendixIndexAt 50 feet from the Selected Altitude, the flight director automatically transitionsfrom Selected Altitude Capture to Altitude Hold Mode and holds the reference altitude.As Altitude Hold Mode becomes active, the white ‘ALTS’ annunciation moves to theactive vertical mode field and flashes green for 10 seconds to indicate the automatictransition.Automatic transition to ALTSMode with ALT Mode armedSetting the selected altitude (Integrated Autopilot Interface):1) Touch the autopilot, and touch ALT.2) Touch the Selected Altitude on the PFD, and use the keypad to enter thedesired Selected Altitude.Setting the selected altitude (GMC 305):1) Touch the autopilot, and touch ALT.2) Touch the Selected Altitude on the PFD, and use the keypad to enter thedesired Selected Altitude.Changing the Selected Altitude while Selected Altitude Capture Mode isactive causes the autopilot to revert to Pitch Hold Mode with Selected AltitudeCapture Mode armed for the new Selected Altitude.ALTITUDE HOLD MODE (ALT)Altitude Hold Mode can be activated by touching ALT or ALT Key (GMC305); the AFCS maintains the current aircraft altitude (to the nearest 10feet) as the Altitude Reference. The Altitude Reference, shown in the G3XTouch Autopilot Status Box, is independent of the Selected Altitude, displayedabove the Altimeter. Altitude Hold Mode active is indicated by a green ‘ALT’annunciation in the G3X Touch Autopilot Status Box.Altitude Hold Mode is automatically armed when in Selected AltitudeCapture Mode. Selected Altitude Capture Mode automatically transitions toAltitude Hold Mode when within 50 feet of the Selected Altitude. In this case,the Selected Altitude becomes the Altitude Reference.
