Garmin G900X Pilot's Manual - page 76

Garmin G900X Pilot’s Guide

190-00726-00  Rev. A

2-16

FLIGHT INSTRUMENTS

Changing navigation sources:

1) 

Select the 

CDI

 Softkey to change from GPS to VOR1 or LOC1.  This places the light blue tuning box over the 

NAV1 standby frequency in the upper left corner of the PFD.

2) 

Select the 

CDI

 Softkey again to change from VOR1 or LOC1 to VOR2 or LOC2.  This places the light blue tuning 

box over the NAV2 standby frequency.

3) 

Select the 

CDI

 Softkey a third time to return to GPS.

Figure 2-23  Selecting a Navigation Source

VOR2 

Selected

NAV2 Selected 

for Tuning

NAV1 Selected 

for Tuning

LOC1 

Selected

CDI

 Softkey Cycles Through 

Navigation Sources

GPS 

Selected

The system automatically switches from GPS to LOC navigation source and changes the CDI scaling accordingly 

when all of the following occur:

• A localizer or ILS approach has been loaded into the active flight plan

• The final approach fix (FAF) is the active leg, the FAF is less than 15 nm away, and the aircraft is moving 

toward the FAF

• A valid localizer frequency has been tuned

• The GPS CDI deviation is less than 1.2 times full-scale deflection

GPS steering guidance is still provided after the CDI automatically switches to LOC until LOC capture, up 

to the Final Approach Fix (FAF) for an ILS approach, or until GPS information becomes invalid.  Activating a 

Vector-to-Final (VTF; see the GPS Navigation Section) also causes the CDI to switch to LOC navigation source; 

GPS steering guidance is not provided after this switch.