Garmin G3X Pilot’s Guide 190-01115-00 Rev. K326AFCSSystemOverviewFlightInstrumentsEISCNSInterfaceGPSNavigationFlightPlanningHazardAvoidanceAdditionalFeaturesAFCSAnnun/AlertsAppendixIndexVNAV TARGET ALTITUDE CAPTURE MODE (ALTV)VNAV Target Altitude Capture is analogous to Selected Altitude CaptureMode and is armed automatically after the VNV Key (GMC 305) or AP VNAVSoftkey is pressed if the VNAV Target Altitude is to be intercepted before theSelected Altitude. The annunciation ‘ALTV’ indicates that the VNAV TargetAltitude is to be captured. Refer to Section 2.3 (Vertical Navigation) for moreinformation on setting up the VNAV target altitude.As the aircraft nears the VNAV Target Altitude, AFCS automatically transitionsto VNAV Target Altitude Capture Mode with Altitude Hold Mode armed. Thisautomatic transition is indicated by the green ‘ALTV’ annunciation flashing forup to 10 seconds and the appearance of the white ‘ALT’ annunciation.At 50 feet from the VNAV Target Altitude, the AFCS automatically transitions fromVNAV Target Altitude Capture to Altitude Hold Mode and selects the VNAV targetaltitude as the new Autopilot Altitude Reference. As Altitude Hold Mode becomesactive, the white ‘ALT’ annunciation moves to the active vertical mode field and flashesgreen for 10 seconds to indicate the automatic transition.
