A Autotuned NAVAID
A At or Above
(constrained altitude)
AA American
AAATS Australian
Advanced Air Traffic Services
AAC Aeronautical
Administration Communication (a class of
communication which supports administrative
communication)
AAS Advanced
Automation System (the end systems for all FAA
air traffic control, located at the ARTCCs)
AATT Advanced
Aviation Transportation Technology
ABM Abeam
A/C Aircraft
AC Air Canada
ACARS Aircraft
Communications Addressing and Reporting System
ACARS ARINC
communications and address reporting system
(digital communications system used primarily
for aircraft-to-airline messages)
ACARS MU ACARS
Management Unit
ACAS Airborne
Collision and Avoidance System
ACF Area Control
Facility
ACFS Advanced
Concepts Flight Simulator (a generic
"glass cockpit")
ACK Acknowledge
ACMS Aircraft
Condition Monitoring System
ACT Active
ADC Air Data Computer
ADF Automatic
Direction Finder
ADI Attitude Director
lndicator
ADLP Aircraft Data
Link Processor (the Mode S subnetwork function
onboard the aircraft that implements the OSI
network layer protocols)
ADMA Aviation
Distributors and Manufactureres Association
ADS Automatic
Dependent Surveillance
AECB Atomic Energy
Control Board
AERA Automated
Enroute ATC
AFCS Automatic Flight
Control System
AFDS Autopilot Flight
Director System (also A/P F/D)
AFS Automatic Flight
System
AGATE Advanced
General Aviation Transport Experiments
AGL Above Ground
Level
AHRS Attitude Heading
Reference System
AIRS Advanced
Infrared Sounder
A/l Anti-ice
AI Artificial
Intelligence
AL Allegheny
Alert Indicator
(visual or auditory) which provides
information to the flightcrew in a timely
manner about an event requiring pilot
awareness.
ALPA Air Line Pilots
Association
ALT Altitude
ALT Alternate
ALTN Alternate
ALT HOLD Altitude
Hold Mode
AM Amplitude
Modulation
AM Aeromexico
AMSS Aeronautical
Mobile Satellite Service
ANA All Nippon
Airways
AOA Angle-of-Attack
AOA Airport
Operations Area
AOC Aeronautical
Operation Control (communications which
support safety and regularity of flight that
normally take place between aircraft and the
operator)
AOCS Attitude and
Orbit Control System
AOM Aircraft
Operating Manual
AOPA Aircraft Owners
and Pilots Association
A/P Autopilot
APA Allied Pilots
Association
APC Aeronautical
Passenger Communication (a class of
communication which supports passenger
communication)
APMS Automated
Performance Measurement System
APPR
Approach/Approach Mode
APR April
APRT Airport
APU Auxiliary Power
Unit
AQP Advanced
Qualification Program
ARAC Aviation
Rulemaking Advisory Committee
ARINC Aeronautical
Radio Incorporated
ARPA Advanced
Research Projects Agency
ARR Arrival
ARTCC Air Route
Traffic Control Center
ARTS Automated Radar
Terminal System
ASCII American
Standard Code for Interface and Interchange
ASI Air Speed
Indicator
ASR Airport
Surveillance Radar
ASRS Aviation Safety
Reporting System (aviation incident reporting
system run by NASA for FAA)
AT At (an altitude)
A/T Autothrottle
ATA Air Transport
Association
ATA Actual Time of
Arrival
ATC Air Traffic
Control (a generic term for a joint
civil/military system for controlling traffic
within a specific area)
ATCS Advanced Train
Control Systems
ATCSCC Air Traffic
Control System Command Center
ATHR Autothrust
System
ATIS Automatic
Terminal Information Service (recorded voice
message that provides weather and airport
services information)
ATM Air
Transportation Management
ATN Aeronautical
Telecommunications Network (the collection of
ground subnetworks, air/ground subnetworks and
airborne subnetworks interconnected by ATN
routers that support computer-to-computer,
internetwork communication and message
transfer between host computers using the OSI
ISO protocol architecture)
ATS Automatic
Throttle System
ATSC Air Traffic
Service Communications (Communications related
to air traffic services. This includes ATC,
aeronautical and meteorological information,
position reporting and services related to
safety and regularity of flight)
AUG August
AV Avianca
AVAIL Available
AVHRR Advanced Very
High-Resolution Radiometer
AWACS Airborne
Warning And Control System
AWAS Automated
Weather Advisory Station
AWIPS Advanced
Weather Interactive Processing System
-
C
Centigrade
CAA Civil Aviation
Authority (Great Britain)
CAB Civil
Aeronautics Board
CAAC Civil Aviation
Authority of China
CAS Calibrated
(Computed) Air Speed
CASE Computer Aided
Software Engineering
CAT Clear Air
Turbulence
CAT Computer Aided
Testing
CAT I Facility
providing operation down to 200 feet
decision height and runway visual range not
less than 2600 feet.
CAT II Facility
providing operation down to 100 feet
decision height and runway visual range not
less than 1200 feet.
CAT II a Facility
providing operation with no decision height
limit to and along the surface of the runway
with external visual reference during final
phase of landing and with a runway visual
range not less than 700 feet.
CBT Computer Based
Training
CDI Course
Deviation Indicator
CDU Control display
unit (pilots' interface to the FMS)
CDTI Cockpit
Display of Traffic Information
CENA Centred' Études
de la Navigation Aérienne (France)
CFIT Controlled
Flight Into Terrain
CG Center of
Gravity
CGS
Centimeter-gram-second
Cl Cost Index
CI China Airlines
CIT Compressor
Inlet Temperature
CLB Climb Detent of
the Thrust Levers
CLR Clear
CMC Central
Maintenance Computer
CNS Communications
Navigations and Surveillance
CO Continetnal
COM Cockpit
Operating Manual
CON Continuous
CO ROUTE Company
Route (also CO RTE)
COTR Contracting
Officer's Technical Representative
COTS Commercial Off
The Shelf
CP Control Panel
CPCS Cabin Pressure
Control System
CPDLC Controller
Pilot Datalink Communications
CPU Central
Processing Unit
CRC Cyclic
Redundancy Check
CRITTER Civil
Rotorcraft IFR Terminal-Area Technology
Enhancement Research
CRM Cockpit
Resource Management
CRM Crew Research
Management
CRS Course
CRT Cathode Ray
Tube
CRZ Cruise
CSD Constant Speed
Drive
CTA Controlled-Time
of Arrival
CTA Control Area (ICAO
Term)
CTAS Center TRACON
Automation System
CTC Centralized
Train Central
CTR Center
CTR Civil Tilt
Rotor
CTRL Control
CVSRF Crew-Vehicle
Simulation Research Facility (NASA Ames)
CWS Control Wheel
Steering
-
V
Velocity
VA Heading to an
Altitude
VA Design
Maneuvering Speed
VAR Variation
VAR Volt-amps
Reactive
VAR Visual-aural
Radio Range
VASI Visual
Approach Slope Indicator
VBF(LO) Flaps up
minimum buffet speed at current maneuver
load factor minus altitude dependent
variable
VBFNG(HI) High
speed CAS at N g's to buffet onset
VBFNG(LO) Low speed
CAS at N g's to buffet onset
VCMAX Active
Maximum Control Speed
VCMIN Active
Minimum Control Speed
VC Design Cruising
Speed
VD Design Diving
Speed
VD Heading to a DME
distance
VF Design Flap
Speed
VFE Flaps Extended
Placard Speed
VFR Visual Flight
Rules
VFXR(R) Flap
Retraction Speed
VFXR(X) Flap
Extension Speed
VG Ground Velocity
VGND Ground
Velocity
VH Maximum
Level-flight Speed with Continuous Power
VHF Very-high
Frequency
VHRR Very
High-Resolution Radiometer
VISSR Visible
Infrared Spin Scan Radiometer
Vl Heading to a
course intercept
Vls Lowest
Selectable Airspeed
VLE Landing Gear
Extended Placard Airspeed
VLO Maximum Landing
Gear of Operating Speed
VLOF Lift-off Speed
VM Heading to a
manual termination
VMC Visual
Meteorological Conditions
VMC Minimum Control
Speed with Critical Engine Out
VM(LO) Minimum
Maneuver Speed
VMAX Basic Clean
Aircraft Maximum CAS
VMIN Basic Clean
Aircraft Minimum CAS
VMO Velocity Max
Operating
VNAV Vertical
Navigation (provides computer description of
aircraft's speed and altitude that can be
tracked by autoflight system)
VNE Never-exceed
Speed
VNO Maximum
Structural Cruising Speed
VOM Volt-ohm-milliammeter
VOR VHF OmniRange
Navigatgion System (ground navigational aid
that can provide display of aircraft
position relative to course through selected
ground navigational radio transmitter)
VORTAC VHF Omni
Range Radio/Tactical Air Navagation
VPATH Vertical Path
VR Heading to a
radial
VR Takeoff Rotation
Velocity
VREF Reference
Velocity
VS Design Speed for
Maximum Gust Intensity
V/S Vertical
Speed/Vertical
VSCS Voice
Switching and Control System
VSI Stalling Speed
in a Specified Flight Configuration
VSO Stalling Speed
in the Landing Configuration
VSTOL Vertical or
Short Takeoff and Landing
VTK Vertical Track
Distance
VTOL Vertical
Takeoff and Landing
V/TRK Vertical
Track
VTR Variable
Takeoff Rating
VU Utility Speed
VX Speed for Best
Angle of Climb
VY Speed for Best
Rate of Climb
Vl Critical Engine
Failure Velocity (Takeoff Decision Speed)
V2 Takeoff Climb
Velocity