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ADS-B

ADS-B Traffic Awareness System (ATAS)

What it does

ATAS uses ADS-B to detect and alert pilots to potential traffic conflicts.

Benefits

This low-cost alerting capability for general aviation should significantly reduce the number of aircraft collisions.

Availability

ATAS standards are complete and ready for manufacturers to produce the necessary avionics (FAA Technical Standard Order - C195b). Companies are now able to offer products compatible with ATAS.

How it works

ATAS monitors potential traffic conflicts by combining ADS-B tracking data with collision-prediction algorithms. When it detects a conflict, ATAS sounds an audio alert (traffic callout). Conflicting aircraft are also highlighted on cockpit displays, when such displays are available in an aircraft.

ADS-B Traffic Awareness System uses ADS-B to detect and alert pilots to potential traffic conflicts.

After receiving an ATAS alert, the pilot takes action appropriate to the operational rules in effect at the time. Unlike TCAS II systems, ATAS does not provide resolution advisories.

ATAS was designed to operate without excessive nuisance alerts in the VFR traffic pattern at small general aviation airports, which is also where most general aviation collisions occur.

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This page was originally published at: https://www.faa.gov/nextgen/programs/adsb/pilot/atas/