A
Aircraft (JAR - FCL License)
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A/C
Air conditioner Unit
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A/G
Aircraft. Air Craft
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A/T
Automatic throttle.
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AAIM
Aircraft Autonomous Integrity Monitor
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ABAS
Aircraft Based Augmenting System.
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ABC
Aluminum-Brass-Chrome. Three main components used in the production of engines that do not have rings. Engines with aluminum piston, chrome or nickel ...
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ABL
Advanced Bimetallic Liner. A Specialized form of ABN. Instead of a single-material plating,single-step, the ABL Plating process is based on a layered ...
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ABN
Aluminum-Brass-Nickel. The components used in the production of non-ringed engines. These engines use an aluminum piston, and a nickel plated brass sl...
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ABOVE GROUND LEVEL (AGL).
Distance between the aircraft and the ground Synonyms: radar altitude;
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ABSOLUTE
Fixed reference, as opposed to moving reference.
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AC
Advisory circular
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ACARS
Airline Communication and Reporting System.
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ACAS
Airborne Collision Avoidance System
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ACC
Area Control Center.
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ACCELARATION
Rate of change of velocity, either scalar or vector, often with subscripts such as ENU or XYZ to denote the coordinate frame; time derivative of veloc...
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ACCELERATION EAST
Aircraft acceleration in true east direction; Symbols: A sub E; Typical Units: ft/s-squared; Dimensions: Length / Time-squared;
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ACCELERATION NORTH
Aircraft acceleration in true north direction; Symbols: A sub N; Typical Units: ft/s-squared; Dimensions: Length / Time-squared;
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ACCELEROMETER
An inertial device for measuring acceleration, usually in three orthogonal axes (lateral X, longitudinal Y, and vertical Z); accelerometers usually co...
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ACCEPT
To allow to proceed, for example with a position update, usually by an operator; Compare: reject
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ACCIDENT
Occurrence associated with the operation of an aircraft which takes place between the time any person boards the aircraft with the intention of flight...
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ACCURACY
Measure of exactness, possibly expressed in percent; Compare: precision
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ACG
ATM/CNS Consulting Group (Euro control)
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ACI
Airport Council International
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ACQUIRE
To begin reception of useful data
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ACT
active, activated, activation message
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ACTIVATE
To begin performing a mission objective, such as flying along a radial of a radio station; usually refers to a mode of radio navigation, such flying a...
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AD
Directive; Maintenance or modification ordered by FAA.
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ADB
Aerodrome
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ADC
Air Data Computer
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ADCUS
Advise customs
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ADD
Architecture Description Document
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ADDR
Air data computer
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ADF
Automatic Direction Finder
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ADI
Attitude direction indicator
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ADIZ
Automatic Direction Finder
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ADLP
Airborne Data Link Processor
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ADMINISTRATOR
means the Federal Aviation Administrator or any person to whom he has delegated his authority in the matter concerned
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ADS
Automatic dependent surveillance
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ADS-A
Automatic Dependent Surveillance
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ADS-B
Automatic Dependent Surveillance-Broadcast
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ADS-C
Automatic Dependent Surveillance-Contract
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ADVERSE YAW
Yaw generated when the ailerons are used. The lifting wing generates more drag, causing the plane to yaw toward it.
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ADVISORY
Automatic Direction Finding
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AEA
Association of European Airlines
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AECMA
Association of European Aerospace Industries
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AEROBATICS
Acrobatic or stunt maneuvers in the air such as loops, rolls, and others.
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AERODYNAMIC COEFFICENTS
means non-dimensional coefficients for aerodynamic forces and moments
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AES
Aircraft Earth station
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AFB
Air Force Base
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AFCS
Automatic flight control system
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AFD
Adaptive flight displays
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AFDS
Autopilot flight director system
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AFIS
Automated flight information system (AlliedSignal)
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AFM
Airplane Flight Manual
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AFT
Towards the rear. Used such as: "...with an aft center of gravity...."
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AFTER RUN OIL
A lubricant designed to displace unburned fuel in the engine after running. The fuel can accelerate corrosion on some engine parts. By using an after ...
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AFTN
Aeronautical Fixed Telecommunication Network
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AGA
Aerodromes and Ground Aids (AIP)
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AGATE
Advanced General Aviation Transport Experiments (NASA)
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AGDL
Air-Ground Data Link
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AGL
Above Ground Level. Used in reference to altitude, e.g. 5000 ft AGL. See also MSL.
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AGLO
Above Ground Level
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AGR
Automatic flight control Sys.
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AGR SLANT RANGE
Straight-line distance from the aircraft to a point on the ground;
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AHOV
Approach to hover
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AHRS
Attitude-heading reference system.
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AI
Altitude indicator
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AIC
Aeronautical Information Circular
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AIDING
A process by which one or more sensors provide data to another sensor to produce results better than any single sensor; aiding occurs at the data sour...
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AILERON
A control surface on fixed-wing aircraft, usually mounted on the aft edge of wings, that controls roll, and is controlled by the wheel; Symbols: delta...
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AILERONS
Hinged control surfaces on usually the wing which can change the wing`s lifting properties. Often located near the tips. Used to bank the aircraft. Th...
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AIM
ATFM Information Message
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AIM (AIRMANS` INFORMATION MANUAL)
A primary FAA publication whose purpose is to instruct airmen about operating in the US airspace system.
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AIP
Aeronautical Information Publication
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AIR CARRIER
Person who undertakes directly, by lease, or other arrangement, to engage in air transportation.
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AIR DATA
Values computed from pitot, static and temperature measurements, usually by means of a digital computer; ARINC 575 defines outputs.
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AIR DATA COMPUTER (ADC)
A primary navigation data source. A navigation sensor based on atmospheric data sensors; usually measures static pressure, dynamic pressure, and outsi...
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AIR DATA DEAD RECKONING (ADDR)
Dead reckoning navigation based on simple instruments as source (barometric altimeter, magnetic compass, airspeed indicator, known wind conditions); s...
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AIR DEFENSE IDENTIFICATION ZONE(ADIZ)
The area of airspace over land or water, extending upward from the surface, within which the ready identification, the location, and the control of ai...
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AIR GROUND RANGING (AGR)
Straight-line distance from the aircraft to a point on the ground;
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AIR ROUTE TRAFFIC CONTROL CENTER(ARTCC) OR CENTER
Facility established to provide air traffic control service to aircraft operating on IFR flight plans within controlled airspace and principally durin...
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AIR TAXI
An aircraft operator who conducts operations for hire or compensation in accordance with FAR Part 135 in an aircraft with 30 or fewer passenger seats ...
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AIR TRAFFIC
means aircraft operating in the air or on an airport surface, exclusive of loading ramps and parking areas
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AIR TRAFFIC CLEARANCE
means an authorization by air traffic control, for the purpose of preventing collision between known aircraft, for an aircraft to proceed under specif...
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AIR TRAFFIC CONTROL
means a service operated by appropriate authority to promote the safe, orderly, and expeditious flow of air traffic
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AIR TRAFFIC CONTROL (ATC)
A service operated by the appropriate authority to promote the safe, orderly, and expeditious flow of air traffic.
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AIR TRAFFIC CONTROL (ATC).
Standard aviation term
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AIR TRANSPORTATION
means interstate, overseas, or foreign air transportation or the transportation of mail by aircraft. Alert Area. An alert area is established to infor...
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AIR-MASS FLIGHT PATH ANGLE
Angle in vertical plane of earth speed vector and groundspeed vector; occasional definition for flight path angle; Compare: earth-referenced flight pa...
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AIRAC
Aeronautical Information Regulation and Control
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AIRBORNE GROCER
A device for barrage-jamming of Wurzburgs. Extremely vulnerable to being homed onto.
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AIRCRAFT
means a device that is used or intended to be used for flight in the air
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AIRCRAFT (AC)
A craft that flies in the air; either fixed or rotary wing.
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AIRCRAFT ENGING
means an engine that is used or intended to be used for propelling aircraft. It includes turbo superchargers, appurtenances, and accessories necessary...
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AIRFOIL
The shape of the wing when looking at its profile. Usually a raindrop type shape.
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AIRFRAME
means the fuselage, booms, nacelles, cowlings, fairings, airfoil surfaces (including rotors but excluding propellers and rotating airfoils of engines)...
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AIRPLANE
means an engine-driven fixed-wing aircraft heavier than air, that is supported in flight by the dynamic reaction of the air against its wings
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AIRPORT
An area on land or water that is used or intended to be used for the landing and takeoff of aircraft and includes its buildings and facilities, if any...
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AIRPORT TRAFFIC CONTROL TOWER(ATCT)
A terminal facility that uses air/ground communications, visual signaling, and other devices to provide ATC services to aircraft operating in the vici...
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AIRSHIP
means an engine-driven lighter-than-air aircraft that can be steered
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AIRSPEED
The speed of an aircraft relative to its surrounding air mass. See: calibrated airspeed; indicated airspeed; true airspeed.
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AIRSPEED (AS, A/S)
See Also: state data, true airspeed, indicated airspeed, calibrated airspeed; Symbols: V sub A/S; Typical Units: kt, ft/s; Dimensions: Length / Time;
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AIRSPEED INDICATOR
An onboard instrument which registers velocity through the air, in miles per hour or in knots.
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AIRY
A standard model for computing earth data
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AIS
Aeronautical Information Service
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ALIGHNMENT
A basic control to a data source from controls and displays to align a device. Also a procedure to align physical devices, usually navigation sensors,...
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ALL-WEATHER FIGHTER/INTERCEPTOR
-equipped jet fighter airplane which can operate at night or in the worst weather.
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ALS
approach light system.
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ALT
Altitude
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ALTERNATE AIRPORT
means an airport at which an aircraft may land if a landing at the intended airport becomes inadvisable
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ALTIDUTE GAIN (KALTINT)
A guidance control law parameter, generated by the vertical guidance modes; varies control authority of the altitude integral in vertical guidance, to...
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ALTIMETER
An onboard instrument which senses air pressure in order to gauge altitude.
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ALTIMETER SETTING
The barometric pressure reading used to adjust a pressure altimeter for variations in existing atmospheric pressure or to the standard altimeter setti...
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ALTINTVAL
Altitude integral input
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ALTITUDE
Height, usually with respect to the terrain below (radar altitude, feet above closest dirt) or fixed earth reference (barometric altitude, feet above ...
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ALTITUDE ENGINE
means a reciprocating aircraft engine having a rated takeoff power that is producible from sea level to an established higher altitude
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ALTITUDE ERROR
A basic output from guidance to flight director, indicating the difference between actual altitude and desired altitude; Symbols: DELTA h; Typical Uni...
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ALTITUDE ERROR SCALE FACTOR(KZSF)
A guidance control law parameter, generated by the vertical guidance modes; varies control authority of vertical guidance
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ALTITUDE INTEGRAL INPUT (ALTINTVAL).
A guidance control law parameter, generated by the vertical guidance modes; a reference altitude for reducing steady-state errors in altitude error Ty...
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ALTITUDE INTEGRAL LIMIT (INTMAGLIM).
A guidance control law parameter, generated by the vertical guidance modes; limits the magnitude of altitude integral value Typical Units: ft; Dimensi...
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ALTN
Alternate
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ALTP
Airline Transport Pilot`s License)
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AM
Amplitude modulation
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AMC
Acceptable Means of Compliance
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AME
Aviation Medical Examiner (U.S.)
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AMIE
AIS Met Information Equipment (Swiss Computer Self Briefing System)
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AMLCD
Active-matrix liquid crystal display.
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AMPHIBIAN
An aircraft that can fly off of water or land. The wheels retract into the hull or floats, depending upon the type of aircraft. An amphibian can land ...
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AMS
Aero Medical Services
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AMSL
Above mean sea level
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ANGEL OF ATTACK
The difference between pitch and the air-referenced flight path angle; the angle between the aircraft center line and the airspeed vector in the verti...
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ANGEL OF ATTACK (AOA)
The angle between the chord line of the wing of an aircraft and the relative wind.
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ANGLE OF ATTACK
The angle that the wing penetrates the air. As the angle of attack increases so does lift, up to a point (and drag).
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ANGULAR ACCELERATION
Rate of change of angular velocity, either scalar or vector, often with subscripts such as XYZ to denote the coordinate frame; time derivative of angu...
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ANGULAR POSITION
Amount of rotation about an axis, either scalar or vector, often with subscripts such as XYZ to denote the coordinate frame; time integral of angular ...
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ANGULAR VELOCITY
Rate of change of rotation about an axis, either scalar or vector, often with subscripts such as XYZ to denote the coordinate frame; time derivative o...
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ANM
ATFM Notification Message
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ANNUAL
Mandatory inspection of airframe and power plant that occurs every 12 months.
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ANNUNCIATOR
Any one of warning, caution, or advisory; Synonyms: alert;
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ANR
Air Navigation Routes
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ANS
Active Noise System
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ANSP
Air Navigation Services
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ANT
Airspace Navigation Team (Euro control)
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AO
Aircraft Operator
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AOC
Airline Operations Centre
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AOPA
Aircraft Owners and Pilots Association
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AOR
Aero of Responsibility
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AOWIR
Aircraft Operator What-If Reroute (CFMU/IFPS)
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AP
Auto Pilot
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APERIODIC
A process that executes based on events rather than a fixed rate, it is not synchronized to other processes of interest; Compare: periodic;
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APP
Approach (Control)
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APPLIANCE
means any instrument, mechanism, equipment, part, apparatus, appurtenance, or accessory, including communications equipment, that is used or intended ...
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APPR
Approach
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APPROACH (APPR)
To fly towards a point; a basic guidance mode, providing lateral guidance, longitudinal guidance, and vertical guidance to a point at an operator sele...
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APPROACH SPEED
The recommended speed contained in aircraft manuals used by pilots when making an approach to landing. This speed will vary for different segments of ...
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APPROACH TO HOVER (AHOV)
Hover approach of a rotary wing aircraft.
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APPROVED
unless used with reference to another person, means approved by the Administrator
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APR
Auxiliary Power Reserve
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APRON
A defined area on an airport or heliport intended to accommodate aircraft for purposes of loading or unloading passengers or cargo, refueling, parking...
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APU
Auxiliary power unit
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ARCID
Aircraft Identification
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AREA
The number of square inches (or feet) of the wing. It`s the wingspan multiplied by the wing`s chord. The area of a tapered wing is the wingspan multip...
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AREA NAVIGATION (RNAV)
means a method of navigation that permits aircraft operations on any desired course within the coverage of station-referenced navigation signals or wi...
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AREA NAVIGATION LOW ROUTE
means an area navigation route within the airspace extending upward from 1,200 feet above the surface of the earth to, but not including, 18,000 feet ...
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AREA NAVIGATION ROUTE
means an area navigation route within the airspace extending upward from, and including, 18,000 feet MSL to flight level 450
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ARF
Almost Ready to Fly. A prefabricated aircraft.
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ARINC
Aeronautical Radio, Inc. A nonprofit corporation owned by member airlines to define form, fit, and function of avionics equipment and to provide radio...
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ARINC 419
Digital information transfer characteristics as applied in ARINC 500-series equipment specifications.
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ARINC 547
Digital specification for ILS reference sensors.
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ARINC 561
Inertial navigation system specifications.
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ARINC 568
Inertial sensor DME reference specification.
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ARINC 571
Inertial sensor attitude-heading reference system specifications.
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ARINC 575
Digital air-data system specifications.
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ARINC 700-SERIES
All-digital equipment specifications for new-generation transport category aircraft.
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ARINC 743
All-digital specifications for FANS-1 compatibility.
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ARM
To strive for a mission objective, such as flying toward a radial of a radio station; usually refers to a mode of radio navigation, such as striving t...
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ARMED FORCES
means the Army, Navy, Air Force, Marine Corps, and Coast Guard, including their regular and reserve components and members serving without component s...
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ARN
ATS Route Network
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ARNS
Aeronautical Radio Navigation Services
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ARO
Air Traffic Services Reporting Office (or Airport Reporting Office)
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ARP
Airport Reference Point
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ARR
Arrival
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ASA
Auto land status annunciator.
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ASAP
As soon as possible
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ASAS
Airborne Separation Assurance system
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ASCB
Avionics standard communication bus (Honeywell)
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ASDIC
:, (Allied Submarine Investigation Committee), a ship-borne sonic detection system first developed in 1917.
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ASF
Air Safety Foundation (AOPA-USA)
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ASL
Above sea level
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ASM
Air Space Management
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ASPECT RATIO
The wingspan divided by the chord. Aspect ratio is important where a wing`s efficiency is concerned. A short aspect ratio (short wings) is better for ...
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ASPH
Asphalt Runway
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ASPIDISTRA
Codename for the ground transmitters operating the DARTBOARD interference system
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ASR
means airport surveillance radar.
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ASTRONOMICAL LATITUDE
Latitude measured with respect to vector of apparent gravity; Compare: geocentric latitude, geodetic latitude; Symbols: Phi sub A; Typical Units: rad,...
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ASV
Air to Surface Vessel. An airborne or ship borne radar used to detect surfaced U-boats and other surface vessels.
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ATA
Actual Time of Arrival
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ATC
Air Traffic Control. A service operated by appropriate authority to promote the safe, orderly and expeditious flow of air traffic.
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ATCO
Air Traffic Control
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ATD
Actual Time of Departure
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ATE
Actual Time Enroute
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ATFM
Air Traffic Flow Management
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ATI AND ATR
ARINC form factors.
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ATIR
Air Traffic Incident Report ("Near-Miss Report")
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ATIS
Automatic Terminal Information Service
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ATM
Air traffic management.
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ATMOSPHERIC DATA
Air Traffic Control
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ATN
Air Traffic Management
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ATP
Airline Transport Pilot (the "highest" grade of pilot certificate)
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ATPL
Airline Transport Pilot (`s License)
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ATS
Air Traffic Services
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ATSP
Air Traffic Service Provider
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ATTIDUDE HEADING REFERENCE SYSTEM(AHRS)
Combines information from a Magnetic Heading Sensor with self-contained aircraft acceleration data to provide attitude, heading, position, body inerti...
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ATTITUDE
The primary aircraft angles in the state vector; pitch, roll, and yaw;
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ATTITUDE INDICATOR
A vacuum powered instrument which displays pitch and roll movement about the lateral and longitudinal axes.
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ATV
Adjustable Travel Volume. Used on many radio transmitters to limit, or extend, maximum throw of a servo. ATV can indicate having a single adjustment w...
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AUDIO PANEL
Electronic device used to switch between radios.
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AUFKL„RUNG
Reconnaissance
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AUSTRALIAN NATIONAL
A standard model for computing earth data
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AUTOGYRO
An aircraft equipped with a rotating wing, or rotor, to sustain itself in the air, and a propeller to move forward.
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AUTOMATIC DIRECTION FINDING(ADF)
A basic guidance mode, providing lateral guidance to a radio station. Equipment that determines bearing to a radio station;
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AUTOMATIC FLIGHT CONTROL SYSTEM(AFCS)
An automated system for controlling the primary flight controls, often with built-in functions for guidance and flight director, and sometimes radio n...
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AUTOMATIC TERMINAL INFORMATIONSERVICE (ATIS)
The continuous broadcast of recorded non control information in selected terminal areas. Its purpose is to improve controller effectiveness and to rel...
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AUTOPILOT
A method of an automatic flight control system which controls primary flight controls to meet specific mission requirments,I.E. maintain a heading or ...
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AUTOROTATION
means a rotorcraft flight condition in which the lifting rotor is driven entirely by action of the air when the rotorcraft is in motion
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AUX FUEL
Auxiliary fuel tanks.
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AUXILIARY ROTER
means a rotor that serves either to counteract the effect of the main rotor torque on a rotorcraft or to maneuver the rotorcraft about one or more of ...
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AVERAGING FILTER
A filter for combining multiple data sources, usually of the same type, by adding with weighted averages; a simple average of the data sources; Compar...
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AVGAS
Aviation Gasoline (piston aircraft fuel)
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AVM
Avionics monitor
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AWACS
Airborne Warning And Control System. An electronically very souped-up Boeing 707. (Pronounced "AY-wax.")
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AWY
Airway
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AXIS
The line around which a body rotates.
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AZIMUTH
An angle in the horizontal plane, usually measured with respect to body coordinates
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