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Air Route Traffic Control Center In air traffic control, an area control center (ACC), also known as a center or en-route center, is a facility responsible for controlling aircraft flying in the airspace of a given flight information region (FIR) at high altitudes between a ...

s (ARTCC) have the capability to recall recorded

radar Radar is a detection system that uses radio waves to determine the distance (''ranging''), angle, and radial velocity of objects relative to the site. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, w ...

data. The National Track Analysis Program (NTAP) can identify and track targets which are at a sufficient altitude to be tracked by radar whether or not they are being "controlled" by the ARTCC. NTAPs requested by the AFRCC have proven to be very helpful during an aircraft search by providing the route of flight and last radar position of an aircraft being searched for.

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Air traffic control {{aviation-stub