Garmin GTS 820 TAS Pilot's Manual page 29

6.4.2.1 Sensitivity Level
As with TAS/TCAS I TA implementations, height above ground is used to
adjust the sensitivity of the ADS-B In alerting algorithm. Radar Altitude (if
available), Calculated Height Above Ground, and ownship altitude are used
to adjust the sensitivity of the ADS-B In alerting algorithm in accordance with
Table 5:
Sensitivity
Level
(HAA) (feet)
≤ 1,500 and w/in
4 5 NM of airport
reference point
4 Unavailable
4 Unavailable
Unavailable or
5
Unavailable or
6
Unavailable or
7
Unavailable or
8
190-00587-02 Rev. E
Height Radar
Above Altitude
Airport (feet)
≤ 1,500
Unavailable
Unavailable or
> 1,500 > 1,500
Unavailable or
> 1,500 > 1,500
Unavailable or
> 1,500 > 1,500
Unavailable or
> 1,500 > 1,500
Table 5 Alerting Thresholds for ADS-B Traffic
Garmin GTS Traffic Systems
Height Above
Terrain (HAT)
(if available)*
Any Any
Any
≤ 1,500
Unavailable or
> 1,500
Unavailable or
> 1,500
Unavailable or
> 1,500
Unavailable or
> 1,500
Ownship
Altitude
(feet)
Any
Any
Any
≤ 5,000
> 5,000 and
≤ 10,000
> 10,000 and
≤ 20,000
> 20,000
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