the Aviation Dictionary

air traffic control clearance - Aircraft Addressing and Reporting System (ACARS)
air traffic control clearance - An authorization by air airborne delay -Amount of delay to be encountered in
trafic control, for the purpose of preventing collision airborne holding.
between known aircraft, for an aircraft to proceed
airborne intercept radar - Radar contained in fighterunder
specified traffic conditions within controlled
airspace.
type aircraft to locate and track airborne targets.
airborne moving target indicator - A feature of
airbome radar that electronically filters out targets that
are either stationary or moving at less than a preset
speed.
air traffic control clearance [ICAO] - Authorization
for an aircraft to proceed under conditions specified by
an air traffic control unit.
Note I: For convenience, the term air traffic control
clearance is frequently abbreviated to clearance when
used in appropriate contexts.
Note 2: The abbreviated term clearance may be prefixed
by the words taxi, takeoff, departure, enroute, approach
or landing to indicate the particular portion of flight to
which the air traffic control clearance relates.
air traffic control service - See air traffic control.
air traffic control service [ICAO] -A service provided
for the purpose of: a. Preventing collisions: 1) Between
aircraft, and 2) On the maneuvering area between
aircraft and obstructions; and b. Expediting and
maintaining an orderly flow of air traffic.
air traffic control specialist - A person authorized to
provide air traffic control service.
airborne navigation equipment - A phrase embracing
many systems and instruments. These systems include
VHF omnirange (VOR), instrument landing systems,
distance-measuring equipment, automatic direction
finders, Doppler systems, inertial navigation systems,
Global Positioning Systems (GPS), and others.
airborne weather radar - An electronic device used to
see objects in darkness, fog, or storms, as well as in
clear weather. The range and relative position are
indicated on the radar scope.
air-breathing engine - An engine that requires an
intake of air to supply the oxygen needed to operate.
Reciprocating and turbine engines are both airbreathing
engines.
air traffic control system command center - An Air air-c001 - excess heat an
Traffic Tactical Operations facility consisting of four
transferring it directly into the airstream.
operational units. air-cooled blades and vanes -Hollow airfoils in the hot
a. Central Flow Control Function (CFCF). Responsible section that receive air from the cold section so they
for coordination and approval of all major inter-center can operate in a much higher temperature environment.
flow control restrictions on a system basis in order to Holes, sometimes referred to as gill holes, film holes,
obtain maximum utilization of the airspace.
or tip holes, direct air back to the gas path.
b. Central Altitude Reservation Function (CARF).
Responsible for coordinating, planning, and approving air-c0o1ed - A heat exchanger in the
special user requirements under the Altitude lubrication system of an aircraft engine that removes
Reservation (ALTRV) concept.
heat from the oil and transfers it into the air that flows
c. Airport Reservation Office (ARO). Responsible for through the cooler.
approving IFR flights at designated high density traffic air-cooled turbine blades - Hollow turbine wheel
airports (John F. Kennedy, LaGuardia, O'Hare, and blades of certain high-powered gas turbine engines that
Washington National) during specified hours.
are cooled by passing compressor bleed air through
d. ATC Contingency Command Post. A facility which them.
enables the FAA to manage the ATC system when
significant portions of the systems's capabilities have air-core electrical transformer - A transformer made
been lost or are threatened.
up of two or more coils wound on a core of nonmagnetic
material. Air-core transformers are normally
air traffic service - A generic term meaning:
used for radio-frequency alternating current.
a. Flight Information Service
b. Alerting Service aircraft - Any weight-carrying device designed to be
c. Air Traffic Advisory Service supported by the air or intended to be used for flight in
d. Air Traffic Control Service the air.
I ) Area Control Service,
aircraft accident - Any damage or injury that occurs
2) Approach Control Service, or when an aircraft is moving with the intention of flight.
3) Airport Control Service.
Aircraft Addressing and Reporting System (ACARS)
air transportation - Interstate, overseas, or foreign air - A digital data network using aircraft VHF andlor
transportation or the transportation of mail by aircraft. HF radio to transmit and receive data to and from
airborne - The condition of an airplane, glider, or airline operations. The system is used by the airlines to
balloon when it is off the ground.
maintain contact with their aircraft around the world
and by pilots to obtain data such as weather.
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