Garmin G3X Pilot’s Guide 190-01115-00 Rev. K322AFCSSystemOverviewFlightInstrumentsEISCNSInterfaceGPSNavigationFlightPlanningHazardAvoidanceAdditionalFeaturesAFCSAnnun/AlertsAppendixIndexVertical Speed ModeVertical Speed Mode SoftkeySelectedAltitudeVertical SpeedMode Active Vertical SpeedReferenceVertical SpeedReference BugINDICATED AIRSPEED MODE (IAS) (GMC 305 ONLY)Indicated Airspeed Mode is selected by pressing the IAS Key. This mode acquiresand maintains the Airspeed Reference (IAS) while climbing or descending. WhenIndicated Airspeed Mode is active, the flight director continuously monitors SelectedAltitude, airspeed and altitude.The Airspeed Reference is set to the current airspeed upon mode activation.Indicated Airspeed Mode is indicated by a green ‘IAS’ annunciation beside the AirspeedReference in the Autopilot Status Box. The Airspeed Reference is also displayed as alight blue bug corresponding to the Airspeed Reference along the airspeed tape.Engine power must be adjusted to allow the autopilot to fly the aircraft at a pitchattitude corresponding to the desired flight profile (climb or descent) while maintainingthe Airspeed Reference.
