Traffic Advisory (Ta); No Bearing Traffic - Honeywell Bendix/King KTA970 Pilot's Manual

KTA 970/KMH 980 Pilot's Guide

TRAFFIC ADVISORY (TA)

A symbol change to a filled yellow circle indicates that the Intruding air-
craft is considered to be potentially hazardous. Depending upon TCAS I
sensitivity level, TCAS I will display a TA when time to CPA (Closest
Point of Approach) is 15 to 30 seconds.
+05

NO BEARING TRAFFIC

In installations with dual directional antennas with landing gear down,
when omnidirectional antenna is installed on the bottom of the aircraft, or
the intruder is located where the TCAS I cannot determine the azimuth
of the intruder, a "No Bearing" TA will be annunciated. If traffic can only
be seen by the bottom antenna as described above, a "No Bearing" TA
would be annunciated as shown. Here the intruder is two nautical miles
away and co-altitude (i.e. same altitude).
Rev 2
Here the Intruder is 500 feet above your aircraft. A
voice is heard in the cockpit, advising:
"Traffic, Traffic"
The crew should attempt to gain visual contact with the
Intruder and be prepared to maneuver upon visual
acquisition.
The crew should take no evasive action
based solely on the TCAS I display.
+500 Ft.
No Bearing TA
TCAS I Theory of Operation and Symbology
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