Garmin GTS 820 TAS Pilot's Manual page 30

6.4.2.2 TA Criteria
Targets may become a TA based on closure rate (time until collision) or if
they encroach within a minimum distance. The criteria used depends on the
current sensitivity level. Once a TA is generated, it will remain a TA for at least
5 seconds, even if the target no longer satisfies the criteria for a TA. Table 6
summarizes the criteria used for TAs.
Sensitivity
Level
Within the next 30 seconds, intruder range and relative altitude are
4
predicted to be within 0.20 NM and 400 ft.
Within the next 35 seconds, intruder range and relative altitude are
5
predicted to be within 0.35 NM and 700 ft.
Within the next 40 seconds, intruder range and relative altitude are
6
predicted to be within 0.55 NM and 700 ft.
Within the next 45 seconds, intruder range and relative altitude are
7
predicted to be within 0.80 NM and 700 ft.
Within the next 48 seconds, intruder range and relative altitude are
8
predicted to be within 1.10 NM and 700 ft.
24
TA Alerting Conditions
Table 6 TA Alerting Conditions
Garmin GTS Traffic Systems 190-00587-02 Rev. E