 The mapping of flights in real-time is based on the air traffic control system.In 1991, data on the location of aircraft was made available by the Federal Aviation Administration to the airline industry.The National Business Aviation Association (NBAA), the General Aviation Manufacturers Association, the Aircraft Owners and Pilots Association, the Helicopter Association International, and the National Air Transportation Association petitioned the FAA to make ASDI information available on a "need-to-know" basis.