G1000 Reference Guide - SkyHoppers

SECTION 6 – AUTOMATICFLIGHT CONTROLWhen a descent leg is captured (Figure 6-12), VerticalPath Tracking becomes active and tracks the descent profile.An altitude capture mode (‘ALTS’ or ‘ALTV’) is armedas appropriate.Vertical Path Tracking ActiveVNAV Target Altitude Capture ArmedVNAVTargetAltitudeVerticalDeviationIndicatorRequiredVerticalSpeed BugHSI Set to GPSTerminalPhase ofFlightFigure 6-12 Vertical Path Tracking ModeAutomatic Pitch Hold ReversionSeveral situations can occur while Vertical PathTracking Mode is active which cause the flight director torevert to Pitch Hold Mode. Vertical Path Tracking and theappropriate altitude capture modes are armed for possibledescent profile recapture if the vertical deviation:• Exceeds 200 ft during an overspeed condition• Experiences a discontinuity exceeding 200 ft due toa flight plan change• Becomes invalid due to excessive cross-track error,track angle error• Cannot be computed for a leg type (such as a holdor procedure turn)The following circumstances cause mode reversionwithout arming Vertical Path Tracking Mode:• Navigation source manually changed from GPS• CNCL VNV Softkey selected on the Active FlightPlan Page (MFD)• All remaining vertical waypoints deleted from theflight plan• Displays entering Reversionary ModeNon-Path DescentsPitch Hold, Vertical Speed, and Flight Level Changemodes can also be used to fly non-path descents while6-12Garmin G1000 Cockpit Reference Guide for the Cessna Nav III190-00384-07 Rev. A