Air Transport World

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ADS-B can fulfill the role of a collision avoidance system and then some, while moving the ATC system toward Free Flight

Searching for a lower-cost option to TCAS for collision avoidance guidance, the Cargo Airline Assn. and its members nearly two years ago began developing a new Aviation Conflict and Airspace Management System using Automatic Dependent Surveillance-Broadcast technology. Initially inspired by looming FAA requirements for collision-avoidance equipage by cargo carriers, CAA quickly found that ADS-B potentially had much more to offer--at about half the price-- than TCAS, which costs between $50,000 and $100,000 a unit.

GAA's system, expected to receive initial FAA certification in the first half of this year, is being developed by 11 Morrow Inc.--pronounced "tomorrow"--of Salem, Ore., a wholly owned subsidiary of UPS.

According to its proponents, ADS-B will improve safety, ease congestion and increase situational awareness by giving pilots and controllers reliable, rent-time traffic information. Users not only will be able to determine the position of conflicting traffic but will be able to see the traffic's direction, speed and relative altitude. …

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