Garmin G1000 NXi Pilot’s Guide for the Cessna NAV III
190-02177-02 Rev. A
378
AUTOMATIC FLIGHT CONTROL SYSTEM
SY
STEM
O
VER
VIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO P
ANEL
& CNS
FLIGHT
MANA
GEMENT
HAZARD
AV
OID
ANCE
AFCS
ADDITIONAL FEA
TURES
APPENDICES
INDEX
If the Course Deviation Indicator (CDI) shows greater than one dot when the
NAV
or
BC
Key is pressed,
the selected mode is armed. If the CDI shows less than one dot, Navigation Mode is automatically captured
when the
NAV
or
BC
Key is pressed. The armed annunciation appears in white to the left of the active lateral
mode.
Figure 7-12 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 flight 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.
c
hanging
the
s
electeD
c
ourse
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.
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 flight plan) when
the
CWS
Button is released.
Figure 7-13 Navigation Mode
GPS Navigation
Mode Active
Command Bars Indicate Right
Turn to Track GPS Course
GPS is Selected
Navigation Source
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