5-24
Pilot’s Guide
190-02488-01 Rev. B
Hazard Awareness
Traffic Application Failures
During normal operation, the “ADS: On” status annunciation means that both AIRB
and ATAS applications are active. In the rare event of an application failure, it is
possible that only one of the applications may be active. The unit provides indications
to reflect which application is no longer operational.
•
ADS field indicates “On”
•
If AIRB is active and ATAS is failed, the unit displays the system message:
“ADS-B traffic alerting function inoperative”
•
If AIRB is failed and ATAS is active (and still capable of providing a no-bearing
aural alert), “Unavailable” annunciates across the traffic display
TRAFFIC APPLICATIONS
AIRB & ATAS
•
Both active when ADS-B is “On”
(airborne traffic indications are available; ATAS arms to
provide airborne alerts)
•
Alerts occur when potential collision risks are determined
based on current airborne position and trajectory and the
position and trajectories of other airborne traffic
•
Airborne traffic alerts only
(no alerts on ground or for traffic on the ground)
•
Nominally allow 20 to 40 seconds for flight crew response
•
Provide aural alerting when traffic alerts occur
SURF
•
Active on ground or within the terminal environment
(<5 nm and <1,500 ft above field elevation)
•
Traffic on ground may display when SURF is active
•
Runway and taxiway depictions when the zoom scale is
<2 nm (Traffic page only)
•
Depicts only traffic and ground vehicles equipped with
ADS-B Out
Summary of Contents for GNC 355
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