Glossary of Aviation Terms and Acronyms
A dictionary of common aviation terms, acronyms, and definitions.
- ATC (Air Traffic Control)
- A critical service provided to ensure safe and efficient movement of aircraft both in the skies and on the ground at airports. Air Traffic Control manages airspace by providing instructions for altitude changes, flight path adjustments, and maintaining safe distances between aircraft.
- Avionics
- The integrated electronic systems used for communication, navigation, monitoring, and flight control in an aircraft. These systems enhance safety, efficiency, and operational capabilities. Common avionics include autopilot, GPS navigation, terrain awareness systems, weather radar, flight management systems (FMS), Automatic Dependent Surveillance-Broadcast (ADS-B), and more.
- Clearance
- Authorization provided by ATC for an aircraft to proceed under specified conditions, ensuring compliance with safety regulations and coordination with other air traffic. Clearances may include instructions for takeoff, landing, altitude changes, route modifications, and more. Clearances go hand-in-hand with sound judgment and do not absolve pilots of the ultimate responsibility for safe operations.
- Commercial Aircraft
- Aircraft designed for the transport of passengers and cargo for revenue purposes. These include narrow-body aircraft like the Airbus A320 and wide-body jets such as the Boeing 777. Cargo-dedicated aircraft, like the Boeing 747 Freighter, are also classified under commercial aviation.
- Control Tower
- A facility at an airport where air traffic controllers monitor and manage aircraft movements. The control tower provides instructions to pilots during takeoff, landing, and taxiing, ensuring safe and efficient operations.
- Deicing
- The process of removing ice, snow, or frost from an aircraft's surfaces for safety and performance.
- EASA (European Union Aviation Safety Agency)
- The regulatory authority responsible for maintaining and improving civil aviation safety in the European Union. EASA oversees aircraft certification, pilot licensing, and airworthiness standards.
- ETOPS (Extended-range Twin-engine Operational Performance Standards)
- A regulatory framework allowing twin-engine aircraft to operate on routes where they are more than 60 minutes flying time from the nearest suitable airport. ETOPS approval ensures the aircraft and airline meet strict safety standards, enabling efficient long-haul operations. ETOPS is a global standard established under the International Civil Aviation Organization (ICAO), and its regulations are adopted by aviation authorities worldwide, including the FAA, EASA and other regional authorities.
- FAA (Federal Aviation Administration)
- The primary regulatory body for civil aviation in the United States, responsible for issuing pilot certificates, overseeing air traffic control, and ensuring compliance with aviation safety standards. The FAA also manages aircraft registration, airport operations, airspace regulations, and the governance of unmanned aircraft systems (UAS), also known as "drones". The FAA establishes rules for drone operation, requiring registration for drones that meet certain size, service or commercial criteria, and implementing safety guidelines to integrate drones into the national airspace.
- FBO (Fixed-Base Operator)
- A business providing essential ground services at an airport, including fueling, aircraft maintenance, hangar storage, and pilot lounges. FBOs cater primarily to general aviation and private aircraft.
- Flight Level
- An altitude designation used in aviation, measured in hundreds of feet and based on standard atmospheric pressure.
- General Aviation
- Encompassing all non-commercial aviation activities, including private flying, recreational aviation, flight training, and small-scale cargo transport.
- ILS (Instrument Landing System)
- A precision approach system that provides pilots with both lateral and vertical guidance for landing, particularly in poor visibility.
- ICAO (International Civil Aviation Organization)
- A specialized United Nations agency that establishes international aviation standards, facilitates global air navigation, and promotes safety.
- Landing Gear
- The undercarriage system of an aircraft used during takeoff, landing, and taxiing. Landing gear may be fixed or retractable to improve aerodynamic efficiency.
- METAR
- An aviation-specific weather report issued hourly or as conditions change, detailing temperature, wind, visibility, and other key weather metrics.
- Mode S Code
- A digital transponder code unique to each aircraft, used for identification and tracking by ATC. Mode S transponders transmit aircraft-specific data, including position and altitude.
- N-Number
- Also known as tail numbers, or aircraft registration numbers, an N-Number is a registration number assigned to US-registered aircraft, beginning with the letter "N." These identifiers are used for operational tracking and ownership registration. "N" indicates U.S. registration under ICAO annexes, and other countries have their own prefixes.
- NOTAM (Notice to Air Missions)
- Time-sensitive, detailed information issued to pilots and other aviation personnel about potential hazards, changes to aeronautical facilities, or temporary conditions that may affect flight safety.
- Nautical Mile
- A standard unit of measurement in aviation and maritime navigation, equivalent to 1.15078 statute miles or 1,852 meters.
- Squawk
- A four-digit code entered into an aircraft’s transponder to communicate with ATC. Special codes include 7500 for hijacking and 7600 for radio failure.
- TAF (Terminal Aerodrome Forecast)
- A detailed weather forecast for a specific airport, issued four times daily and valid for 24 to 30 hours.
- Taxiway
- A designated pathway at an airport connecting runways, terminals, and hangars. Taxiways are marked with signs and lights for safe navigation.