Garmin G1000 Pilot's Manual page 71

Changing navigation sources:
1) Press 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) Press 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) Press the CDI Softkey a third time to return to GPS.
GPS
Selected
Pressing the CDI Softkey Cycles
through Navigation Sources
The system automatically switches from GPS to LOC navigation source (ILS CDI capture) 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 HSI 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) approach (see the GPS Navigation Section) also causes the HSI to switch to LOC
navigation source; GPS steering guidance is not provided after this switch.
190-00498-01 Rev. A
NAV1 Selected for Tuning
LOC1
Selected
Figure 2-22 Selecting a Navigation Source
Garmin G1000 Pilot's Guide for Cessna Nav III
FLIGHT INSTRUMENTS
NAV2 Selected for Tuning
VOR2
Selected
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