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 station /e. ste..(.)n/ noun a
small airfield with facilities for the
maintenance of aircraft airstream /e.strim/ noun the flow of air caused by the movement of the aircraft through the air . 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.
airstrip /e.str.p/ noun a place for air-craft to take off and land that has no facilities and is often temporary
air taxi /e. tksi/ noun a small com-mercial aircraft used for short flights between places not on a regular airline route
air terminal 14
air terminal /e. tm.n(.)l/ noun 1.
an airport building with a range of facil-ities where passengers check in before boarding their plane and where they arrive when their plane lands 2. a build-ing in a city for receiving passengers who are being transported to or from an airport by train or bus
air terrorism /e. ter.r.z(.)m/
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-tight /e. ta.t/ adjective closed or sealed so that air cannot get in or out
air-to-air /e.t.e./ adjective between
one airborne aircraft and another . air-to-air communications . air-to-air communications communications between one airborne aircraft and another
air to air refuelling area /e. t. e. rifju.l.. e.ri./ noun an area of air-space in which tanker aircraft are per-mitted to refuel other aircraft in flight. Abbreviation AARA
air-to-ground visibility /e. t. raυnd v.z.b.l.ti/ noun a descrip-tion of how easily seen an object on the ground is from the air . 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-surface /e. t. sf.s/ adjec-tive directed from a flying aircraft to a point on the ground
air traffic /e. trf.k/ noun aircraft operating in the air or on the airport sur-face . 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 /e. trf.k k.n
tr.υl/ noun a service that oversees and guides the movements of aircraft and provides for the safe and efficient flow of air traffic . Controllers in the tower provide an air traffic control service for aircraft in the air around the airfield.
Abbreviation ATC
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.
| 
