6 Terms
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Air traffic control
An in-airport service that facilitates the safe and orderly movement of aircrafts within and between airports, achieved by interpreting data from radar and weather devices, and by maintaining contact with pilots.
Industry: Aviation
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Air traffic control
Radar return
Aviation; Air traffic control
(1) The electromagnetic energy received after reflection from an object. (2) The deflection or change of intensity produced by a radar echo on a cathode ray tube display.
Secondary radar
Aviation; Air traffic control
A radar system that requires complementary aircraft equipment (transponder). The transponder generates a coded reply signal in response to transmissions from the ground station (interrogator). Since ...
Runway-holding position
Aviation; Air traffic control
ICAO: A designated position intended to protect a runway, an obstacle limitation surface, or an instrument landing system (ILS)/microwave landing system (MLS) critical/sensitive area at which taxiing ...
Localizer type directional aid (LDA)
Aviation; Air traffic control
U.S.: A NAVAID used for nonprecision (sic) instrument approaches with utility and accuracy comparable to a localizer but which is not a part of a complete instrument landing system (ILS) and is not ...
Low altitude alert system (LAAS)
Aviation; Air traffic control
U.S.: An automated function of the TPX-42 that alerts the controller when a Mode C transponder-equipped aircraft on an IFR flight plan (FP) is below a predetermined minimum safe altitude. If ...
Maximum authorised altitude (MAA)
Aviation; Air traffic control
U.S.: A published altitude representing the maximum usable altitude or flight level (FL) for an airspace structure or route segment. It is the highest altitude on a Federal airway, jet route, area ...
Minimum crossing altitude (MCA)
Aviation; Air traffic control
U.S.: The lowest altitude at certain fixes at which an aircraft must cross when proceeding in the direction of a higher minimum en route IFR altitude (MEA).
