Garmin G1000 PDAs & Smartphones User Manual


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Garmin G1000 Pilot’s Guide for Cessna Nav III
190-00498-07 Rev. A
438
AUTOMATIC FLIGHT CONTROL SYSTEM
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE
AFCS
ADDITIONAL
FEATURES
APPENDICESINDEX
ALTITUDE HOLD MODE (ALT)
AltitudeHoldModecanbeactivatedbypressingthe
ALT
Key;theightdirectormaintainsthecurrentaircraft
altitude(tothenearest10feet)astheAltitudeReference.Theightdirector’sAltitudeReference,showninthe
AFCSStatusBox,isindependentoftheSelectedAltitude,displayedabovetheAltimeter.AltitudeHoldMode
activeisindicatedbyagreen‘ALT’annunciationintheAFCSStatusBox.
AltitudeHoldModeisautomaticallyarmedwhentheightdirectorisinSelectedAltitudeCaptureMode(see
Figure7-6).SelectedAltitudeCaptureModeautomaticallytransitionstoAltitudeHoldModewhenthealtitude
errorislessthan50feet.Inthiscase,theSelectedAltitudebecomestheightdirector’sAltitudeReference.
CHANGING THE ALTITUDE REFERENCE
NOTE: Turning the ALT Knob while in Altitude Hold Mode changes the Selected Altitude, but not the flight
director’s Altitude Reference, and does not cancel the mode.
Withthe
CWS
Buttondepressed,theaircraftcanbehand-owntoanewAltitudeReference.Whenthe
CWS
Buttonisreleasedatthedesiredaltitude,thenewaltitudeisestablishedastheAltitudeReference.
Figure 7-7 Altitude Hold Mode
Command Bars Hold Pitch Attitude
to Maintain Altitude Reference
Altitude Hold
Mode Active
Altitude
Reference
Selected
Altitude
Selected
Altitude
Bug
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