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ADS-B In Trail Procedures

Project Information

The overall objective of the ADS-B In Trail Procedures (ITP) concept is to increase the efficiency of long-haul flights while maintaining the current level of safety. The concept takes advantage of ADS-B In to display traffic on an Electronic Flight Bag (EFB). In addition to increasing flight crew awareness of the traffic around them, ITP displays offer the capability of climbing or descending through altitudes currently blocked by traffic due to procedural separation standards. After flight crews gain experience with the ITP display and the capability of the ITP to optimize altitude, it is expected that they will be comfortable lowering the amount of contingency fuel carried, thereby reducing fuel burn and carbon emissions. ADS-B equipment provides situational awareness up to 200 miles out, compared to the current 40 miles, which enhances safety over the ocean. The expanded view will also enable pilots to make more informed requests of air traffic control for changes in altitude or to avoid weather or turbulence. The FAA has worked with the International Civil Aviation Organization (ICAO) to develop a new separation standard that allows aircraft to climb or descend through the altitude of blocking traffic, if that traffic is at least 15 miles distant from the requesting aircraft. ADS-B ITP will allow flight crews to obtain optimum altitudes more often than they can using today's separation standards. Currently conducting operational flight evaluations of ADS-B ITP on aircraft in revenue service, on routes between the Oakland Flight Information Region (FIR) between the U.S. west coast and Australia, using certified avionics equipment. ITP has the potential to expand operations into the New Zealand and Fijian airspace and the Northern Pacific routes to Japan/ Korea.