Garmin G3X Touch Pilot's Manual page 352

AFCS
2) EXTERNAL NAVIGATOR: Ensure the 'GPS' indication is showing in the
lower-left corner
3) G3X Touch: Ensure that GPS1 is the selected navigation source on the PFD.
4) EXTERNAL NAVIGATOR: Select and activate the GPS approach using the
PROC Key.
5) G3X Touch: From the PFD touch the autopilot then touch APPR.
Or:
APR Key on the GMC control unit.
Press the
LOCALIZER WITH GLIDESLOPE
LOC Mode (lateral) and GS Mode (vertical) are both armed by touching APPR
from the G3X Touch PFD or by pressing the APR Key on the GMC control unit. LOC/
ILS approach captures are inhibited if the difference between aircraft heading and
localizer course exceeds 105˚.
NOTE: To cancel Glideslope (GS) Mode without canceling LOC Mode, touch
NAV once. Pressing it a second time cancels LOC Mode.
Selecting LOC Mode with GS Mode:
1) EXTERNAL NAVIGATOR: Tune and activate the desired LOC frequency.
2) G3X Touch: Ensure that LOC1 is the selected navigation source. The HSI
should automatically slew the needle to the correct course.
3) G3X Touch: From the PFD touch the autopilot then touch APPR.
Or:
APR Key on the GMC control unit.
Press the
This simultaneously selects LOC Mode and GS (Glideslope) Mode. If the
localizer deviation is less than half-scale when touching APPR or the APR
Key is pressed, the autopilot will activate LOC Mode and track the localizer,
otherwise LOC Mode is armed and the pilot is responsible for intercepting
the localizer.
If the following occurs, the autopilot reverts to Roll Hold Mode (wings rolled level):
• Approach Mode is active and the Navigation source is manually
switched
330
Garmin G3X Touch
. If not, press the CDI Key.
™ Pilot's Guide for Certified Aircraft
190-02472-00 Rev. D