Abbreviation ADC air densitynoun the density of the atmosphere airfieldnoun an area of land given over to runways, taxiways and aprons o When the pressure setting on the altimeter is set to 1013.25 millibars, the pressure altitude of the airfield is known as QNE.
air filternoun a device to filter solid particles out of the air in engine and ventilation systems airflownoun 1. the movement of air over the aircraft as it travels through the atmosphere 2. a current of air flowing through or past an object or body o The compressor must provide an adequate airflow through the engine.
air intake .noun the front part of a jet engine where air enters air lanenoun a regular route that aeroplanes fly along airlinenoun a company which manages air transport services for passengers or goods o Which airline is she working for, Air France or Air Canada? o Most airlines do not allow passengers to smoke during flight. airlinernoun an aeroplane designed to carry large numbers of passengers o Concorde is the world’s fastest airliner.
airlinesecurity area noun an area in which measures are taken by an airline to ensure the safety of people and property Airline Transport Pilot’s Licence noun the licence that a person must have to be the pilot-in-com-mand or co-pilot of a public transport aircraft.
airmannoun a person who is a member of a country’s Air Force airmanshipnoun all- round skill in piloting an aircraft which includes academic knowledge, common sense, quick reactions, awareness, experience, consideration for other people and property o Keeping a careful lookout for other aircraft in the circuit is good airmanship. ‘I was always told by my airmanship instructor, in an emergency, to find the largest piece of asphalt with the biggest fire trucks’ [INTER PILOT]
air massnoun a very large mass of air in the atmosphere in which the temperature is almost constant and which is divided from another mass by a front o ^4ir masses are divided into two types according to source region, and these are known as polar and tropical air masses.
airportnoun a civil aerodrome designed for the take-off and landing of passenger-carrying aircraft for the general public and/or cargo aircraft o London Heathrow is one of the busiest airports in the world. Abbreviation A/P
airshownoun a public display of aircraft in flight and on the ground, held at an airfield airsidenoun the part of an airport where the aircraft take off and land, load, or unload air socknoun same as wind-sock
airspacenoun the part of the atmosphere that is above a particular geographical area and is subject to the laws of a particular country or controlling authority o The Korean 747 flew into Soviet airspace and was shot down. airspeednoun the speed of the aircraft relative to the air around it o Maintain a constant airspeed on final approach.
airspeed indicator noun a primary cockpit or flight deck instrument which shows the pilot the speed of the aircraft in relation to the air around it o Airspeed is shown in knots on the airspeed indicator. Abbreviation ASI
Comment: The position of the pitot tube and the attitude of an aircraft can affect the accuracy of the airspeed indicator. Aircraft operating handbooks usually have a table to help pilots calculate calibrated airspeed (CAS).
air stationnoun a small airfield with facilities for the maintenance of aircraft airstreamnoun the flow of air caused by the movement of the aircraft through the air o Pressure is built up inside the pitot tube by the air-stream.
Comment: Unlike airflow, airstream does not refer to the movement of air around the airframe and its aerodynamic effect.
airstripnoun a place for air craft to take off and land that has no facilities and is often temporary air taxinoun a small commercial aircraft used for short flights between places not on a regular airline route
airterminalnoun 1. an airport building with a range of facilities where passengers check in before boarding their plane and where they arrive when their plane lands 2. a building in a city for receiving passengers who are being transported to or from an airport by train or bus air terrorism noun violent actions that aim to frighten or kill passengers, disrupt air services, or damage or destroy aircraft in an attempt to achieve a political objective air-tightadjective closed or sealed so that air cannot get in or out air-to-airadjective between one airborne aircraft and another o air-to-air communications □ air-to-air communications communications between one airborne aircraft and another air to air refuelling area
noun an area of airspace in which tanker aircraft are permitted to refuel other aircraft in flight. Abbreviation AARA air-to-ground visibility noun a description of how easily seen an object on the ground is from the air o Glare caused by reflection of sunlight from the top of a layer of fog or haze can seriously reduce the air-to-ground visibility. air-to-surfaceadjective directed from a flying aircraft to a point on the ground
air trafficnoun aircraft operating in the air or on the airport surface o Students practising circuit flying need to keep a very careful lookout especially at times when there is a lot of air traffic.
air traffic control noun a service that oversees and guides the movements of aircraft and provides for the safe and efficient flow of air traffic o Controllers in the tower provide an air traffic control service for aircraft in the air around the airfield.
Comment: Air Traffic Control’s main function is to maintain separation between aircraft operating within Instrument Flight Rules (IFR), but it also provides a service to aircraft using Visual Flight Rules (VFR). Ground control is for aircraft taxiing to and from runways. The tower controls aircraft around an airport, clearing them for take-off or landing. Departure and approach controls monitor and control aircraft around the airport, and en route centres control traffic between airports.
air traffic controller noun a person who works in air traffic control and whose main task is to ensure correct separation of aircraft in all phases of flight o The air traffic controller approved the emergency landing. Abbreviation ATC. t> controller
air traffic movements plural noun the number of aircraft taking off and landing o an increase in air traffic movements airwaynoun an area of the sky, usually rectangular in cross-section, along which civil aircraft fly from place to place o Airways provide a high degree of safety by ensuring adequate separation between aircraft. o Aircraft inside an airway are controlled by ATC. (note: Airways are usually 10 nm wide with a centreline joining navigational beacons.)
airworthinessnoun the state of an aircraft with regard to whether it can fly safely, as determined by a national certifying authority airworthiness directive noun a regulation issued by an aviation authority when a problem has been identified with a particular aircraft part.
AIS abbreviation aeronautical information services
alarmnoun 1. fear or worry If the ammeter shows a high level of charge after start-up, it is quite normal and no cause for alarm. 2. a warning sound or light o In the event of fire or overheat, the control unit will produce an alarm.verb to frighten or worry o Severe turbulence may alarm passengers.
alertadjective fully awake, watchful and ready to deal with any situation o The crew must be alert at all times to the possibility of hijacking, bombs and stowaways. noun a signal, warning everyone to be alert □ to be on the alert to be watchful and ready for anything that may happen verb to warn o It is the cabin staff’s responsibility to alert the flight crew if they see smoke coming from an engine.
Alightadjective on fire Although the passenger thought he had extinguished his cigarette, it was still alight when he threw it into the waste disposal bin. verb (formal) 1. (of people) to leave or get off an aeroplane o At some airports, passengers alight onto the apron when they leave the aircraft. 2. (of aircraft) to land o An aeroplane may not fly over a city below such a height as would allow it to alight in the event of an engine failure.