Aeronautical Terms beginning with A

Aircraft Hazard Area

Used by air traffic control 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 altitude reservation (ALTRV). Unless otherwise specified, the vertical limits of an AHA are from the surface to unlimited.