Garmin G3X Pilot's Manual page 294

Additional Features
AIRPORT SIGNS
Airport Signs provide a visual representation of airport location and identification on
the synthetic vision display. Airport Signs appear on the display when the aircraft is
approximately 15 nm from and airport and disappear at approximately 4.5 nm. Airport
signs are shown without the identifier until the aircraft is approximately eight nautical
miles from the airport.
Airport Sign
with Identifier
(Between 4.5 nm
and 8 nm)
RUNWAYS
WARNING: Do not use Synthetic Vision runway depictions as the sole means
for determining the proximity of the aircraft to the runway or for maintaining
the proper approach path angle during landing.
NOTE: Not all airports have runways with endpoint data in the database,
therefore, these runways are not displayed.
Runway data provides improved awareness of runway location with respect to the
surrounding terrain. All runway thresholds are depicted at their respective elevations
as defined in the database. In some situations, where threshold elevations differ
significantly, crossing runways may appear to be layered. As runways are displayed,
272
Airport Signs
Garmin G3X Pilot's Guide
Airport Sign
without Identifier
(Between 8 nm
and 15 nm)
190-01115-00 Rev. K