Garmin G1000 PDAs & Smartphones User Manual


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Garmin G1000 Pilot’s Guide for Cessna Nav III
190-00498-07 Rev. A
454
AUTOMATIC FLIGHT CONTROL SYSTEM
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE
AFCS
ADDITIONAL
FEATURES
APPENDICESINDEX
NAVIGATION MODES (GPS, VOR, LOC)
NOTE: The selected navigation receiver must have a valid VOR or LOC signal or active GPS course for the
flight director to enter Navigation Mode.
NOTE: When intercepting a flight plan leg, the flight director gives commands to capture the active leg at
approximately a 45° angle to the track between the waypoints defining the active leg. The flight director
does not give commands to fly to the starting waypoint of the active leg.
PressingtheNAVKeyselectsNavigationMode.NavigationModeacquiresandtrackstheselectednavigation
source(GPS,VOR,LOC).TheightdirectorfollowsGPSrollsteeringcommandswhenGPSistheselected
navigationsource.WhenthenavigationsourceisVORorLOC,theightdirectorcreatesrollsteeringcommands
fromtheSelectedCourseanddeviation.NavigationModecanalsobeusedtoynon-precisionGPSandLOC
approacheswhereglideslopecaptureisnotrequired.
IftheCourseDeviationIndicator(CDI)showsgreaterthanonedotwhentheNAV Key is pressed, the selected
modeisarmed.IftheCDIislessthanonedot,NavigationModeisautomaticallycapturedwhentheNAV Key
is pressed. The armed annunciation appears in white to the left of the active roll mode.
Figure 7-22 GPS Navigation Mode Armed
WhentheCDIhasautomaticallyswitchedfromGPStoLOCduringaLOC/ILSapproach,GPSNavigation
Moderemainsactive,providingGPSsteeringguidanceuntilthelocalizersignaliscaptured.LOCNavigation
Modeisarmedwhentheautomaticnavigationsourceswitchtakesplace.IftheAPR Key is pressed prior to the
automatic navigation source switch, LOC Navigation mode is armed.
IfNavigationModeisactiveandeitherofthefollowingoccur,theightdirectorrevertstoRollHoldMode
(wings rolled level):
•DifferentVORtunedwhileinVORNavigationMode(VORNavigationModerevertstoarmed)
•Navigationsourcemanuallyswitched(withtheCDI Softkey)
•DuringaLOC/ILSapproachtheFAFiscrossedwhileinGPSNavigationModeaftertheautomaticnavigation
sourceswitchfromGPStoLOC
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