Garmin Aera 660 Pilot's Manual page 148

Hazard Avoidance
Symbol
Non-threat, non-directional airborne traffic
Non-threat directional airborne Traffic with absolute vector. Points in the
direction of the aircraft track.
Non-directional airborne Proximity Advisory (PA). Proximity Advisories
are issued for any traffic within 6 nautical miles and +/- 1,200'.
Directional airborne Proximity Advisory (PA) with absolute vector. Points
in the direction of the aircraft track. Proximity Advisories are issued for
any traffic within 6 nautical miles and +/- 1,200'.
Non-directional airborne Traffic Advisory (TA)
Non-directional off-scale airborne Traffic Advisory (TA). Displayed at
outer range ring at proper bearing.
Directional airborne Traffic Advisory (TA) with absolute vector. Points in
the direction of the aircraft track.
Directional off-scale airborne Traffic Advisory (TA). Points in the direction
of the aircraft track.
Ground traffic without directional information.
Directional surface traffic.
Non-directional non-aircraft ground traffic.
Directional non-aircraft ground traffic.
TRAFFIC ALERTS (ADS-B TIS-B)
A traffic audio alert is generated whenever the number of Traffic Advisories on the
aera 660 display increases. Limiting Traffic Advisories only reduces the "nuisance"
alerting due to proximate aircraft. For example, when the first Traffic Advisories appear
on the display, the user is alerted audibly. So long as a single aircraft remains on
the display, no further audio alert is generated. If additional aircraft appear on the
screen, a new audio alert is sounded. Traffic Advisories can only be issued when the
compatible device knows its own altitude and the altitude of the intruder aircraft.
132
Description
ADS-B Traffic Symbology
Garmin aera 660 Pilot's Guide
190-02017-20 Rev. E