ATAS is a more refined alerting technolgy that is more predictive (35 seconds prior to CPA) than older alerting systems. ATAS continues working below 500’ where traffic conflicts most often occur. When ATAS and Active TAS are combined, traffic alerting is based on using the best information first. The Lynx ATAS option announces the range, bearing and relative altitude of intruder aircraft and issues warnings such as “Traffic, traffic, seven o’clock high, two miles.”