Garmin Socata TBM850 Pilot's Manual page 463

TA ALERTING CONDITIONS
The GTS 820 automatically adjusts its TA sensitivity level to reduce the likelihood of nuisance TA alerting
during flight phases likely to be near airports. Level A (less) TA sensitivity is used when the aircraft' s landing
gear is extended, or when the radar altimeter (if equipped) indicates own aircraft altitude is below 2000' AGL.
In all other conditions, Level B (greater) TA sensitivity is used to assess TA threats.
Sensitivity Intruder Altitude
Level
A
A
B
B
190-00709-04 Rev. A
Available
Intruder closing rate provides less than 20 seconds of vertical and
horizontal separation.
Or:
Intruder closing rate provides less than 20 seconds of horizontal
Yes
separation and vertical separation is within 600 feet.
Or:
Intruder range is within 0.2 nm and vertical separation is within
600 feet.
No Intruder closing rate provides less than 15 seconds of separation.
Intruder closing rate provides less than 30 seconds of vertical and
horizontal separation.
Or:
Intruder closing rate provides less than 30 seconds of horizontal
Yes
separation and vertical separation is within 800 feet.
Or:
Intruder range is within 0.55 nm and vertical separation is within
800 feet.
No Intruder range is less than 20 seconds.
Table 6-31 TA Sensitivity Level and TA Alerting Criteria
Garmin G1000 Pilot's Guide for the Socata TBM 850
TA Alerting Conditions
HAZARD AVOIDANCE
449