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Glossary
| AC | Advisory Circular |
| AC/DC | Alternating Current/Direct Current |
| ACE | Aerobatic Competency Evaluator |
| ADO | Airports District Office |
| Aerobatic Box | The airspace at an air show where participating aircraft are authorized to perform aerobatic maneuvers appropriate to their category. |
| Aerobatic Flight | Unwaivered, Part 91.303 - intentional maneuver - abrupt change in altitude - acceleration - not normal flight. Waivered - sustained inverted flight - rolled upright to 90 degree angle. Pitch/bank angle exceeds 60 degrees for turbo jets, 90 degrees for all other aircraft. |
| Aerobatic Maneuver | Aircraft participating in an air show... stalls; spins; inverted flight; pitch angles exceeding plus or minus 30 degrees; and bank angles of 60 degrees or greater. |
| AGL | Above Ground Level |
| Air Boss | The individual who has the primary responsibility for air show operations on the active taxiways, runways, and the surrounding air show demonstration area. |
| Air Show | An aviation event defined as an aerial demonstration by one or more aircraft before an invited assembly of persons. |
| Air Show Demonstration Area | The total airspace (lateral and vertical limits) identified by the FAA waiver, temporary flight restriction (TFR), or the notice to airmen (NOTAM) issued for an air show (sometimes referred to as the waivered airspace). |
| AKA | Also Known As |
| ALP | Airport Layout Plan |
| ALS | Advance Life Support |
| Approved Maneuver | A maneuver or a series of maneuvers that have been approved by the FAA General Aviation and Commercial Division, AFS-800. These may include flight over the designated spectator area(s) below 1,000 feet above ground level (AGL), or a maneuver that may involve energy directed at the spectator area that meets safety criteria. |
| ARFF | Airport Rescue Fire Fighting |
| ASI | Aviation Safety Inspector |
| ATC | Air Traffic Control |
| ATF | Alcohol, Tobacco and Firearms (US Bureau of) |
| ATIS | Automatic Terminal Information Service |
| ATS | Air Traffic Service |
| Aviation Event | Aviation events include air shows, closed course air races, certain parachute demonstration jumps, fly-ins, balloon meets, and competitions that are conducted before an invited assembly of persons. Aerobatic competitions are not addressed or included in this chapter. The aviation event begins when the first invited guest arrives and ends when the last invited guest leaves. |