Next Generation Air Transportation System
（重定向自NGAT）
The Next Generation Air Transportation System (NextGen) is a new National Airspace System due for implementation across the United States in stages between 2012 and 2025. NextGen proposes to transform America’s air traffic control system from a radar-based system with radio communication to a satellite-based one. GPS technology will be used to shorten routes, save time and fuel, reduce traffic delays, increase capacity, and permit controllers to monitor and manage aircraft with greater safety margins. Radio communications will be increasingly replaced by data exchange and automation will reduce the amount of information the air crew must process at one time.