Navigation Modes (Gps, Vor, Loc, Bc) - Garmin G3X Pilot's Manual

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.
NOTE: When intercepting a flight plan leg, the flight director gives com-
mands 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 fly to the starting waypoint of the active leg.
NOTE: When making a backcourse approach, set the Selected Course to the
localizer front course.
Pressing the NAV Key or AP NAV Softkey selects Navigation Mode. Navigation
Mode acquires and tracks the selected navigation source (GPS, VOR, LOC). The flight
director follows GPS roll steering commands when GPS is the selected navigation
source. When the navigation source is VOR or LOC, the flight director creates roll
steering commands from the Selected Course and deviation. Navigation Mode can
also be used to fly non-precision GPS and LOC approaches where vertical guidance is
not required.
Backcourse Navigation Mode is selected when the localizer front course is greater
than 105° from the aircraft heading. Backcourse Navigation Mode captures and tracks
a localizer signal in the backcourse direction. The annunciation 'BC' in the Autopilot
Status Box indicates Backcourse Navigation Mode.
If the Course Deviation Indicator (CDI) shows greater than one dot when the NAV
Key or AP NAV Softkey is pressed, the selected mode is armed. If the CDI is less than
one dot, Navigation Mode is automatically captured when the NAV Key or AP NAV
Softkey is pressed. The armed annunciation appears in white to the left of the active
roll mode.
190-01115-00 Rev. K
Navigation Mode Annunciation
Garmin G3X Pilot's Guide
AFCS
337