Garmin G3X Pilot’s Guide 190-01115-00 Rev. K318AFCSSystemOverviewFlightInstrumentsEISCNSInterfaceGPSNavigationFlightPlanningHazardAvoidanceAdditionalFeaturesAFCSAnnun/AlertsAppendixIndexSELECTED ALTITUDE CAPTURE MODE (ALTS)Selected Altitude Capture Mode is automatically armed with activation of thefollowing modes:• Pitch Hold• Vertical Speed• Indicated Airspeed (GMC 305)• TO/Go Around (GMC 305)• Vertical Path Tracking (if theSelected Altitude is to becaptured instead of the VNVTarget Altitude)The white ‘ALTS’ annunciation indicates Selected Altitude Capture Mode is armed.Press the AP ALT Softkey or ALT Softkey, and turn the FMS Joystick to set theSelected Altitude (shown above the Altimeter) until Selected Altitude Capture Modebecomes active.SelectedAltitudeAs the aircraft nears the Selected Altitude, the flight director automatically transitionsto Selected Altitude Capture Mode with Altitude Hold Mode armed. This automatictransition is indicated by the green ‘ALTS’ annunciation flashing for up to 10 secondsand the appearance of the white ‘ALTS’ annunciation. The Selected Altitude is shownas the Altitude Reference beside the ‘ALTS’ annunciation.Automatic transition to ALTSMode with ALT Mode armedAt 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.
