Garmin G3X Pilot's Manual page 308

Integrated Autopilot
GPS APPROACH WITH VERTICAL GUIDANCE
NOTE: To cancel Glidepath (GP) Mode without cancelling GPS Mode, press the AP
NAV Softkey once. Pressing it a second time cancels GPS Mode.
When Glidepath (GP) Mode is armed for a GPS approach with vertical guidance, GPS
Mode is automatically armed.
Selecting a GPS approach with vertical guidance:
1) EXTERNAL NAVIGATOR: Ensure a GPS approach with vertical guidance
(LPV, LNAV/VNAV, LNAV+V) is loaded into the active flight plan.
2) EXTERNAL NAVIGATOR: Ensure the 'GPS' indication is showing in the
lower-left corner
3) 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).
4) EXTERNAL NAVIGATOR: Select and activate the GPS approach using the
PROC Key.
5) 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.
LOCALIZER WITH GLIDESLOPE
LOC Mode (lateral) and GS Mode (vertical) are both armed by pressing the ALT/
PTCH Softkey and then the AP APPR Softkey from the G3X PFD. LOC/ILS approach
captures are inhibited if the difference between aircraft heading and localizer course
exceeds 105˚.
290
. If not, press the CDI Key.
Approach Softkeys
Garmin G3X Pilot's Guide 190-01115-00 Rev. G