9-40
GTN 625/635/650 Pilot’s Guide
190-01004-03 Rev. P
Traffic
9.9.3
TCAS II Alerts
When the TCAS II unit issues a TA or RA, the following occur:
• A ‘TRAFFIC’ annunciation appears in the annunciator bar of the GTN,
flashes for 5 seconds and remains displayed until no TAs or RAs are detected
in the surveillance area.
- RA ‘TRAFFIC’ annunciations are white text with red backgrounds.
- TA ‘TRAFFIC’ annunciations are black text with yellow backgrounds.
- If a TA and RA occur simultaneously, only the red and white RA
‘TRAFFIC’ annunciation is shown.
• If the GTN is not displaying the traffic page, the system displays a traffic
alert pop-up.
• During a TA event, the system issues a single “Traffic, Traffic” voice alert
each time the system detects a new TA threat.
• During an RA event, voice alert(s) provide vertical guidance to resolve the
traffic conflict.
- The Vertical Speed Indicator displays a range of vertical speeds to fly
to or avoid as applicable.
- Additional voice alerts occur if the RA status changes and when the
aircraft is clear of the conflict.
If the traffic system cannot determine the bearing of a Traffic or Resolution
Advisory, the alert will be displayed as a traffic alert banner outlined in the
following table:
Summary of Contents for GTN 625
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