Garmin G3X Pilot's Manual page 373

COUPLED ILS APPROACH WITH PROCEDURE TURN
NOTE: Configuration of a GNS 430 or GNS 530 is required for a coupled ILS
approach.
The external navigator (GNS 430/530), G3X, and autopilot can be used to fly a
full ILS approach with procedure turn, from the enroute environment to the missed
approach point.
Setting up a coupled ILS approach:
1) EXTERNAL NAVIGATOR: Ensure the 'GPS' indication is showing in the
lower-left corner
2) G3X: Ensure that GPS1 is the selected navigation source on the PFD or
PFD Page (use the CDI SRC Softkey to cycle through external navigation
sources if necessary).
3) EXTERNAL NAVIGATOR: Select and activate the ILS approach using the
PROC Key.
4) G3X: From the PFD or PFD Page, press the HDG/ROLL Softkey to access
the autopilot lateral modes and then press the AP NAV Softkey to activate
GPS Mode. The autopilot should start navigating to the IAF (Initial
Approach Fix).
NAV Key on the GMC 305
Or: Press the
5) EXTERNAL NAVIGATOR: Tune and identify the localizer frequency by
pressing the VLOC Flip-flop Key. (Note: The external navigator should have
automatically loaded the localizer frequency into the standby VLOC slot.)
6) G3X: From the PFD or PFD Page, press the ALT/PTCH Softkey to access the
autopilot pitch modes and then press the AP APPR Softkey to arm LOC and
GS modes. Press the AP ALT Softkey.
APR Key on the GMC 305
Or: Press the
GPS Mode is now active and LOC Mode is armed in the roll axis. ALT
Mode is active and GS is armed in the pitch axis. The autopilot should now
navigate the entire approach from the IAF (Initial Approach Fix) to the MAP
(Missed Approach Point) with the only adjustment being the throttle.
NOTE: Check step #5 if the external navigator doesn't automatically switch
from GPS to VLOC Mode shortly after turning inbound on the final approach
course.
190-01115-00 Rev. K
. If not, use the CDI Key.
Garmin G3X Pilot's Guide
AFCS
351