Garmin Flight Deck 100 Marine Instruments User Manual


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190-00728-04 Rev. A
Embraer Prodigy
®
Flight Deck 100 Pilot’s Guide
473
AUTOMATIC FLIGHT CONTROL SYSTEM
NAVIGATION MODES (GPS, VOR, LOC, BC)
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.
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verticalguidanceisnotrequired.
BackcourseModecapturesandtracksalocalizersignalinthebackcoursedirection.Themodemaybeselected
by pressing the NAVKey.Whenmakingabackcourseapproach,settheSelectedCoursetothelocalizerfront
course. The flight director creates roll steering commands from the Selected Course and deviation.
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 lateral mode.
Figure 7-26 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automaticallywhenthenavigationsourceswitchtakesplaceiftheAPR Key is not pressed prior
to the automatic source switch.
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crossedwhileinGPSNavigationModeaftertheautomaticnavigation
sourceswitchfromGPStoLOC
CHANGING THE SELECTED COURSE
IfthenavigationsourceisVORorlocalizerorOBSModehasbeenenabledwhenusingGPS,theSelected
Course is controlled using the CRS Knob corresponding to the selected flight director (CRS1 for the pilot
side, CRS2 for the copilot side).
Pressing the CWS Button and hand-flying the aircraft does not change the Selected Course while in
NavigationMode.TheautopilotguidestheaircraftbacktotheSelectedCourse(orGPSightplan)whenthe
CWS Button is released.
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