9-13
190-01004-03 Rev. P
GTN 625/635/650 Pilot’s Guide
Traffic
9.4.1
TAS Symbology
Traffic Advisory System (TAS) is designed to help in detection and avoidance
of other aircraft. TAS uses an on-board interrogator-processor to detect traffic.
Only aircraft with operating transponders will be detected. Traffic is displayed
according to TCAS symbology using four different symbols.
TAS Symbol
Description
Non-Threat Traffic
(intruder is beyond 5 NM and greater than 1,200 ft vertical
separation)
Proximity Advisory (PA)
(intruder is within 5 NM and less than 1,200 ft vertical separation)
Traffic Advisory (TA)
(closing rate, distance, and vertical separation meet TA criteria)
Traffic Advisory Off Scale
Table 9-6 TAS Intruder Symbol Description
Relative Altitude (1,200 ft Above)
Vertical Trend Arrow (Climbing)
Non-Threat Traffic
Figure 9-7 Intruder Type, Altitude, and Vertical Trend
Summary of Contents for GTN 625
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