Automatic Dependent Surveillance-Broadcast

Overview
Automatic Dependent Surveillance-Broadcast (ADS-B) is a crucial component of the nation's Next-Generation Air Transportation System (NextGen), and its implementation over the next 20 years will turn the NextGen vision into a reality. After years of research and development, the Federal Aviation Administration (FAA) determined in 2005 that ADS-B was ready to be implemented throughout the national airspace system.

With ADS-B, both pilots and controllers can see radar-like displays of air traffic. The displays update next-to-real time and do not degrade with distance or terrain. The system also gives pilots access to weather services and flight information services.

The gains in safety, capacity, and efficiency as a result of moving to a satellite-based system will enable the FAA to meet the expected growth in air traffic predicted in coming decades. Because ADS-B is a flexible and expandable platform, it can change and grow with the evolving aviation system.