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Used by ATC to segregate air traffic from a launch vehicle, reentry vehicle, amateur rocket, jettisoned stages, hardware, or falling debris generated by failures associated with any of these activities. An AHA is designated via NOTAM as either a TFR or stationary ALTRV. Unless otherwise specified, the vertical limits of an AHA are from the surface to unlimited.
Listed in the Pilot/Controller Glossary as a cross-reference to AIRCRAFT HAZARD AREA (AHA), whose text is shown above.
Source FAA Pilot/Controller Glossary · checked 2026-08-25