Garmin G3X Pilot's Manual page 278

Hazard Avoidance
t a
raFFiC DviSorieS
The GDL 39 automatically adjusts its Traffic Advisory (TA) sensitivity level to reduce
the likelihood of nuisance TA alerts during various phases of flight. TAs are issued for
traffic when they are predicted to be within a specified volume of airspace around your
aircraft in a specified amount of time. The protected volume and time interval varies
based on the current geodetic altitude and groundspeed. Thus, the protected volume
of airspace increases with altitude and ground speed. Refer to the following table for
details.
Altitude
(Geodetic)
Below 5,000
5,000-10,000
10,000-20,000
20,000-42,000
Above 42,000
The following Traffic symbols are displayed on the display when Synthetic Vision (SVX)
is installed and enabled. See the Additional Features Section for more information
about SVX.
ADS-B Symbol on the
256
(ta)
Look Ahead
Time (sec.)
30
40
45
48
48
Traffic Advisories
PFD (SVX Only)
PFD ADS-B Symbology (SVX Only)
Garmin G3X Pilot's Guide
Vertical
Separation (ft.)
+/-850
+/-850
+/-850
+/-850
+/-1,200
Description
Proximity Advisory (PA)
Traffic Advisory (TA)
Non-threat traffic
Horizontal
Separation (nm.)
.35
.55
.80
1.10
1.10
190-01115-00 Rev. K