|
|
| A |
|
| 3D,
4D |
three-
or four-dimensional |
| 4096 CODE |
the
octal base, four-digit code used between framing pulses of a reply to
identify an aircraft or for general use and emergency codes (XPD) |
| A |
ampere(s) |
| A |
autotuned
navaid |
| AAC |
aeronautical
administration communications |
| AAC |
airline
administrative communications |
| AAL |
above
aerodome level |
| AAMP |
advanced
architecture microprocessor |
| AATT |
advanced
aviation transportation technology |
| AAS |
advanced
automation system (FAA) |
| A/B |
autobrake |
| ABC |
automatic
brightness control |
| A-BPSK |
aviation
binary phase shift keying |
| AC |
advisory
circular |
| AC |
alternating
current |
| A/C |
aircraft |
| ACAC |
air-cooled
air cooler |
| ACARS |
aircraft
communications addressing and reporting system |
| ACAS |
airborne
collision avoidance system (FAA) |
| ACC |
active
clearance control |
| ACC |
area
control center |
| ACD |
automatic
conflict detection |
| ACE |
actuator
control electronics |
| ACE |
advanced
certification equipment |
| ACIPS |
airfoil
cowl ice protection system |
| ACF |
area
control facility |
| ACK |
acknowledgment |
| ACMF |
airplane
condition monitoring function |
| ACMP |
alternating
current motor pump |
| ACMS |
aircraft
condition monitoring system |
| ACNSS/ |
advanced
communication/navigation/ surveillance system |
| ACP |
audio
control panel |
| ACS |
active
control system |
| ACS |
audio
control system |
| ACT |
active |
| ACTC |
airport
traffic control towers |
| ACTD |
advanced
concept technology demonstration |
| ACU |
apron
control unit |
| ACU |
autopilot
control unit |
| ACU |
antenna
control unit |
| AD |
airworthiness
directives (FAA) |
| A/D |
analog-to-digital |
| ADA |
a
computer programming language |
| ADC |
air
data computer |
| ADF |
automatic
direction finding |
| ADI |
attitude
direction indicator |
| ADIRS |
air
data inertial reference system |
| ADIRU |
air
data inertial reference unit |
| ADL |
aeronautical
data link |
| ADLP |
aircraft
data link processor (Mode S) |
| ADLP |
airborne
data link protocol |
| ADM |
air
data module |
| ADMS |
airline
data management system |
| ADP |
air
driven pump |
| ADR |
address |
| ADR |
alternative
dispute resolution |
| ADRAS |
airplane
data recovery and analysis system |
| ADS |
automatic
dependent surveillance |
| ADS |
air
data system |
| ADS-A |
automatic
dependent surveillance- addressed |
| ADSA |
automatic
dependent surveillance- automation |
| ADS-B |
automatic
dependent surveillance- broadcast |
| ADSEL |
address
selective |
| ADSP |
automatic
dependent surveillance panel |
| ADSSG |
ADS
Study Group (ICAO) |
| ADSU |
automatic
dependent surveillance unit |
| AECU |
audio
electronic control unit |
| AED |
ALGOL
extended for design |
| AEEC |
Airlines
Electronic Engineering Committee (ARINC) |
| AEP |
ARINC
engineering practices |
| AEP |
audio
entertainment player |
| AERA |
automated
en route air traffic control |
| AES |
aircraft
earth station (Inmarsat) |
| AESS |
aircraft
environment surveillance system |
| AF |
airway
facilities |
| AFC |
Aeronautical
Frequency Committee (AEEC) |
| AFC |
automatic
frequency compensation |
| AFC |
automatic
frequency control |
| AFCAS |
automatic
flight control augmentation system |
| AFCS |
automatic
flight control system |
| AFD |
adaptive
flight display |
| AFD |
autopilot
flight director |
| AFDC |
autopilot
flight director computer |
| AFDS |
autopilot
flight director system |
| AFDX |
avionics
full-duplex Ethernet switch |
| AFEPS |
ACARS
front-end processing system |
| AFGCS |
automatic
flight guidance and control system |
| AFI |
authority
format identifier |
| AFIS |
airborne
flight information system |
| AFIS |
automatic
flight information service |
| AFIS |
automated
flight inspection system |
| AFM |
aircraft
flight manual |
| AFN |
air
traffic services facilities notification |
| AFS |
aeronautical
fixed service (ICAO) |
| AFS |
automatic
flight system |
| AFSK |
audio
frequency shift keying |
| AFSS |
automated
flight service stations |
| AFTN |
aeronautical
fixed telecommunications network |
| AFTRCC |
Aerospace
and Flight Test Radio Coordinating Council |
| AFU |
artificial
feel unit |
| A/G |
air/ground;
air to ground |
| AGACS |
automatic
A/G communication system |
| AGAE |
A/G
applications engineering |
| AGATE |
Advanced
General Aviation Transport Experiments (NASA) |
| AGC |
automatic
gain control |
| AGCOS |
A/G
communication services |
| AGCU |
auxiliary
generator control unit |
| AGDL |
A/G
data link |
| AGIS |
A/G
intermediate system |
| AGL |
above
ground level |
| AGR |
A/G
router |
| AGRM |
air/ground
router-regional manager |
| AGS |
A/G
system |
| AGSS |
ACARS
ground system standard (AEEC) |
| AGTS |
A/G
test station |
| AGVS |
A/G
voice subnetwork |
| AGW |
ARTS
gateway |
| AHC |
attitude
heading computer |
| AHRS |
attitude
heading reference system |
| AI |
alternative
interrogator |
| AI |
artificial
intelligence |
| AIC |
aeronautical
information circular |
| AIDC |
air
traffic services interfacility data communications |
| AIDS |
aircraft/airborne
integrated data system |
| AIED |
aeronautical
industry engineering and development |
| AIEM |
Airlines
International Electronic Meeting (AMC) |
| AIFSS |
automated
international flight service stations |
| AIL |
aileron |
| AIMS |
airport
information management system |
| AINSC |
aeronautical
industry service communication |
| AIO |
analog
input/output |
| AIP |
aeronautical
information publication |
| AIP |
analog
input |
| AIP |
Airport
Improvement Program (FAA) |
| AIRAC |
aeronautical
information regulation and control |
| AIRCOM |
digital
air/ground communications service (SITA) |
| AIRMET |
airman’s
meteorological information |
| AIRO |
analog
input/reference output |
| AIS |
aeronautical
information service |
| AIS |
automatic
information services (Eurocontrol) |
| AISG |
Applications
Interface Subgroup (IATA) |
| AIV |
accumulator
isolation valve |
| AJPS |
AFEPS
journal processing system |
| A/L |
autoland |
| ALC |
airline
link control |
| ALC |
asynchronous
link control |
| ALC |
automatic
level control |
| ALPA |
Air
Line Pilots Association |
| ALPS |
automatic
line protection service |
| ALS |
application
layer structure |
| ALT |
airborn
link terminal |
| ALT |
altitude/alternate |
| ALD HOLD |
altitude
hold mode |
| ALTM |
altimeter |
| ALTN |
alternate |
| ALTS |
altitude
select |
| ALU |
arithmetic
and logic unit |
| AM |
access
module |
| AM |
amplitude
modulation |
| AMASS |
airport
movement area safety system |
| AMC |
Avionics
Maintenance Conference |
| AMCP |
aeronautical
mobile communications panel |
| AME |
amplitude
modulation equivalent |
| AMI |
airline
modifiable information |
| AMLCD |
active
matrix liquid crystal display |
| AMP |
audio
management panel |
| AMPL |
amplifier |
| AMS |
ARINC
maintenance service |
| AMS |
apron
management service |
| AMS |
avionics
management service |
| AMS |
acquisition
management system |
| AMS(R)S |
aeronautical
mobile satellite (route) service |
| AMSS |
aeronautical
mobile satellite service |
| AMTOSS |
aircraft
maintenance task oriented support system |
| AMTS |
aeronautical
message transfer service |
| AMU |
audio
management unit |
| AMU |
ACARS/avionics
management unit |
| AMUX |
audio
multiplexer |
| A/N |
alphanumeric |
| ANC |
Air
Navigation Commission (ICAO) |
| ANDC |
airport
and navigation data compiler |
| ANICS |
Alaskan
NAS Interfacility Communication |
| ANLP |
ARINC
network layer protocol |
| ANP |
actual
navigation performance |
| ANP |
air
navigation plan/performance |
| ANS |
air
navigation system |
| ANS |
ambient
noise sensor |
| ANSI |
American
National Standards Institute |
| ANTC |
advanced
networking test center |
| AO |
acronymic
obfuscation |
| AOA |
ACARS
over AVLC |
| AOA |
angle
of attack |
| AOC |
airport
obstruction chart |
| AOC |
airport
operational communications |
| AOC |
aircraft
operational control |
| AOC |
airline
operational control |
| AOC |
aeronautical
operational control |
| AOC |
airline
operations center |
| AOCC |
airline
operations control center |
| AODB |
airport
operational database |
| AODC |
age
of data, clock (GPS) |
| AODE |
age
of data, ephemeris (GPS) |
| AOG |
aircraft
on ground |
| AOHE |
air/oil
heat exchanger |
| AOM |
aircraft
operating manual |
| AOP |
analog
output |
| AOP |
aeronautical
OSI profile |
| AOP |
airline
operational procedure |
| AOPA |
Aircraft
Owners and Pilots Association |
| AOR |
Atlantic
Ocean region |
| AOR-E |
Atlantic
Ocean region-east |
| AOR-W |
Atlantic
Ocean region-west |
| AP |
airport
location (ACARS/AFEPS) |
| A/P |
autopilot |
| APA |
autopilot
amplifier |
| APA |
Allied
Pilots Association |
| APANPIRG |
ASIA/PAC
Air Navigation Planning & Implementation Regional Group |
| APB |
auxiliary
power breaker |
| APB |
acquisition
program baseline |
| APC |
aeronautical
passenger communication |
| APC |
aeronautical
public correspondence |
| APC |
autopilot
computer |
| APFDS |
autopilot
flight director system |
| APMS |
automated
performance measurement system |
| API |
application
programming interface |
| APN |
ARINC
packet network |
| APP |
approach
control |
| APPR |
approach |
| APR |
actual
performance reserve |
| APRL |
ATN
profile requirement list |
| APU |
auxiliary
power unit |
| APUC |
auxiliary
power unit controller |
| AQF |
avionics
qualification facility |
| AQP |
advanced
qualification program |
| AQP |
avionics
qualification procedure/program |
| A-QPSK |
aeronautical
quadrature phase shift keying |
| AQS |
advanced
quality system |
| ARAC |
Aviation
Rulemaking Advisory Committee (FAA) |
| ARB |
arbitrary
waveform generator |
| ARD |
advanced
requirement definition |
| ARDEP |
analysis
of research & development in Eurocontrol programs |
| ARF |
airline
risk factor |
| ARM |
area
regional manager |
| ARMC |
area
regional maintenance center |
| ARP |
address
resolution protocol |
| ARP |
air
data reference panel |
| ARRAS |
airport
remote radio access system |
| ARS |
administrative
region selector |
| ARS |
automated
radar summary (chart) |
| ARSR |
area/air
route surveillance radar |
| ART |
automatic
reserve thrust |
| ARTAS |
ATM
surveillance tracker & server system (Eurocontrol) |
| ARTCC |
air
route traffic control center |
| ARTS |
automated
radar terminal system |
| A/S |
airspeed |
| AS-3 |
Avionics
System Group 3 (SAE) |
| ASA |
aircraft
separation assurance |
| ASA |
autoland
status annunciator (AFDS) |
| ASAA |
ACARS
system access approval (AEEC) |
| ASAC |
Aviation
Security Advisory Committee (FAA) |
| ASAS |
aircraft
separation assurance system (AEEC) |
| ASC |
aircraft
system controller |
| ASC |
aural
synthesizer card |
| ASCII |
American
standard code for information interchange |
| ASCPC |
air
supply and cabin pressure controllers |
| ASCS |
air
supply control system |
| ASCU |
anti-skid
control unit |
| ASD |
aircraft
situation display |
| ASDAR |
aircraft-to-satellite
data relay |
| ASDE |
airport
surface detection equipment |
| ASDL |
aeronautical
satellite data link |
| ASDR |
airport
surface detection radar |
| ASE |
altimetry
system error |
| ASECNA |
Agency
for Security of Aerial Navigation in Africa and Madagascar |
| ASG |
ARINC
signal gateway |
| ASI |
avionics
system integration |
| ASIC |
application
specific integrated circuit |
| ASL |
above
sea level |
| ASM |
airspace
management |
| ASM |
autothrottle
servo motor |
| A-SMGCS |
advanced
surface movement guidance and control systems |
| ASOS |
automated
surface observation system |
| ASP |
ACARS
subnetwork protocol |
| ASP |
altitude
set panel |
| ASP |
aeronautical
fixed service systems planning (AFS) |
| ASP |
acquisition
strategy paper |
| ASPP |
application
specific programmable processor |
| ASR |
airport
surveillance radar |
| ASRS |
aviation
safety reporting system |
| ASSTC |
aerospace
simulation and systems test center |
| ASSV |
alternate
source selection valve |
| ASTA |
airport
surface traffic automation |
| ASTF |
airspace
system task force |
| ASTOR |
Airborne
Stand-Off Radar (UK) |
| ASV |
alternate
servo valve |
| AT |
air
transport |
| AT |
at
an altitude |
| A/T |
autothrottle |
| ATA |
Air
Transport Association of America |
| ATA |
actual
time of arrival |
| ATAS |
aviation
traffic and application software |
| ATC |
air
traffic control |
| ATCA |
Air
Traffic Control Association |
| ATCBI |
ATC
beacon interrogator |
| ATCC |
area
and terminal control center |
| ATCRBS |
ATC
radar beacon system |
| ATCSS |
ATC
signaling system |
| ATCT |
airport
traffic control tower (FAA) |
| ATDL |
air
transport data link |
| ATE |
automatic
test equipment |
| ATE |
avionics
test and evaluation |
| ATFM |
air
traffic flow management |
| ATHR |
autothrust
system |
| ATI |
airborne
tracker illuminator |
| ATIDS |
airport
surface target identification system/service |
| ATIS |
airport
traffic information system |
| ATIS |
automatic
terminal information service |
| ATL |
autothrottle
limit |
| ATLAS |
abbreviated
test language for avionics systems |
| ATM |
air
traffic management |
| ATM |
asynchronous
transfer mode |
| ATMAS |
ATM
automation system |
| ATM DSS |
ATM
decision support service |
| ATMS |
area
navigation, test and management services |
| ATN |
aeronautical
telecommunication network |
| ATNE |
ATN
engineering |
| ATNP |
ATN
panel |
| ATP |
acceptance
test procedure/plan |
| ATPAC |
Air
Traffic Procedures Advisory Committee (FAA) |
| ATR |
acceptance
test report |
| ATR |
air
transport racking |
| ATS |
air
traffic services |
| ATS |
air
turbine starter |
| ATS |
autothrottle
system |
| ATSC |
air
traffic services communication |
| AT/SC |
autothrottle/speed
control |
| ATSGF |
air
traffic services geographic filter |
| ATSMP |
air
traffic services message processor |
| ATSO |
air
traffic services organization |
| ATSP |
air
traffic services provider |
| ATSRAC |
Aging
Transport Systems Rulemaking Advisory Committee (FAA) |
| ATSU |
air
traffic services unit |
| AUX |
auxiliary |
| AVC |
aviation
VHF car rental availability(messages) |
| AVH |
aviation
VHF hotel availability(messages) |
| AVLAN |
avionics
local area network |
| AVLC |
aviation
VHF link control |
| AVM |
airborne
vibration monitor |
| AVN |
avionics |
| AVOL |
aerodrome
visibility operational level |
| AVPAC |
aviation
VHF packet communications |
| AVS |
aviation
VHF seat availability (messages) |
| AWACS |
airborne
warning and control system |
| AWAS |
automated
weather advisory station |
| AWG |
American
wire gauge |
| AWIN |
aviation
weather information |
| AWIPS |
advanced
weather interactive processing system |
| AWM |
auto
warning mixer |
| AWO |
all
weather operations |
| AWOP |
AWO
panel |
| AWOS |
automated/airport
weather observing system |
| AWR |
aviation
weather research |
| B |
|
| BDMIS |
business
data management and invoicing system |
| BDS |
comm-B
designation subfield |
| BEP |
back-end
processor |
| BEPMS |
BEP
management system |
| BER |
bit
error rate |
| BFE |
buyer
furnished equipment |
| BFO |
beat
frequency oscillator |
| BGI |
bus
grant inhibit |
| BGP |
border
gateway protocol |
| BI |
burn-in |
| BiGs |
bilingual
ground station (ACARS and VDL Mode 2) |
| Binary |
base-2
counting system |
| BIS |
boundary
intermediate system |
| BISMS |
BIS
management system |
| BIST |
built-in
self-test |
| BiSync |
binary
synchronous control |
| BIT |
built-in
test |
| Bit |
a
binary digit |
| BITE |
built-in
test equipment |
| BLK |
block/black |
| BMV |
brake
metering valve |
| BNR |
binary |
| BNS |
boundary
notification system (squitters) |
| BOC |
bottom
of climb |
| BOP/COP |
bit-oriented
protocol/ character-oriented protocol |
| BP |
bite
processor |
| BPCU |
bus
power control unit |
| BPS |
bits
per second |
| BPSK |
binary
phase shift keying |
| BR |
bridge |
| BRG |
bearing |
| BRI |
basic
rate interface |
| BRT |
brightness |
| BSN |
backbone
subnetwork |
| BSC |
binary
synchronous communication |
| BSCU |
brake
system control unit |
| BSP |
board
support package |
| BSU |
beam
steering unit |
| BSU |
bypass
switch unit |
| BTB |
bus
tie breaker |
| BTMU |
brake
temperature monitor unit |
| BU |
backup |
| BUEC |
BU
emergency communications |
| BUFR |
binary
universal form for communication representation |
| BWAN |
BU
wide area network |
| Byte |
a
grouping of eight bits |
| C |
|
| CAA |
civil
aviation authority |
| CAAC |
Civil
Aviation Administration of China |
| CAB |
Civil
Aeronautics Board |
| C&C |
command
and control (also C2) |
| C&W |
control
and warning |
| CAASD |
Center
for Advanced Aviation System Development (Mitre Corp.) |
| CAC |
caution
advisory computer |
| C/A code |
course
acquisition code (GPS) |
| CACP |
cabin
area control panel |
| CAD |
computer-aided
design |
| CADAG |
Communications,
Automation and Data Link Applications Group |
| CADS |
centralized
automatic dependent surveillance |
| CAE |
component
application engineer |
| CAGE |
commercial
avionics GPS engine |
| CAH |
cabin
attendant handsets |
| CAI |
caution
annunciator indicator |
| CALSEL |
variation
of SELCAL system |
| CAM |
computer-aided
manufacturing |
| CARE |
cooperative
actions on R&D in Eurocontrol |
| CAS |
collision
avoidance system |
| CAS |
computed
airspeed |
| CAS |
commercially
available software |
| CASE |
computer-aided
software engineering |
| CAT |
category |
| CAT |
clear
air turbulence |
| CAT |
computer
aided testing |
| CAT |
categories
(I, II, IIIa/b/c) approach |
| CBA |
cost/benefit
analysis |
| CBT |
computer-based
training |
| CC |
connection
confirm |
| CCB |
converter
circuit breaker |
| CCB |
configuration
control board |
| CCD |
category
class diagram |
| CCD |
cursor
control device |
| CCD |
charged
coupled device |
| CCB |
configuration
control board |
| CCIR |
International
Radio Consultative Committee |
| CCITT |
Consultative
Committee International Telephone and Telegraph |
| CCP |
consolidated
control panel |
| CCS |
cabin
communication system |
| CCTV |
closed-circuit
television |
| CD |
chrominance
difference |
| CD |
carrier
detect |
| CDA |
coordinating
design authority |
| CDG |
configuration
database generator |
| CDI |
course
deviation indicator |
| CDM |
collaborative
decision-making |
| CDMS |
CDM
system |
| CDP |
continuous
data program |
| CDR |
critical
design review |
| CDS |
common
display system |
| CDTI |
cockpit
display of traffic information |
| CDU |
control
display unit |
| CEPT |
Conference
Europeene des Postes et Telecommunications |
| CF |
change
field |
| CFDIU |
centralized
fault display interface unit |
| CFDS |
central
fault display system |
| CFDU |
configurable
file data unit |
| CFIT |
controlled
flight into terrain |
| CFM |
cubic
feet per minute |
| CFM |
configuration
management |
| CFMU |
central
flow management unit |
| CFS |
cabin
file server |
| CG |
center
of gravity |
| CHI |
computer/human
interface |
| CHIS |
center
hydraulic isolation system |
| CI |
configuration
item |
| CI |
cabin
interphone |
| CID |
category
interaction diagram |
| CIDIN |
common
ICAO data interchange network |
| CIDS |
cabin
interphone distribution system |
| CIE |
Commission
Internationale de I ‘Eclairage |
| CIP |
capital
investment plan |
| CIP |
convergence
& implementation program (Eurocontrol) |
| CIS |
common
information services |
| CIS |
corporate
information system |
| CLNP |
connectionless
network protocol |
| CLNS |
connectionless
network service |
| CLTP |
connectionless
mode transport protocol |
| CM |
context/configuration
management |
| CMC |
central
maintenance computer |
| CMCF |
CMC
function |
| CMCS |
CMC
system |
| CMD |
command |
| CMF |
common
message format |
| CMGT |
contract
management |
| CMM |
capability
maturity model |
| CMM |
component
maintenance manual |
| CMM |
common
mode monitor |
| CMN |
control
motion noise |
| CMOS |
complementary
metal oxide semiconductor |
| CMP |
configuration
management plan |
| CMS |
cabin
management system |
| CMU |
communication
management unit |
| CNDB |
customized
navigation database |
| CNES |
Centre
National d’Etudes Spatiales |
| C/NO |
carrier-to-noise
density ratio |
| CNP |
com/nav/pulse |
| CNS |
communication,
navigation surveillance |
| CNS/ATM |
communications,
navigation, surveillance/air traffic management |
| CODEC |
coder/decoder |
| COM |
cockpit
operating manual |
| COM |
communications |
| COMM |
communications |
| COM/MET/OPS |
communications/
meteorological/operations |
| CON |
continuous |
| COMSAT |
Communications
Satellite Corp. |
| CONOPS |
concept
of operations |
| CONUS |
continental
United States |
| COP |
character-oriented
protocol |
| COTP |
connection-oriented
transport protocol |
| COTR |
contracting
officer’s technical representative |
| COTS |
commercial-off-the-shelf |
| CP |
central
processor |
| CP |
conflict
probe |
| CP |
control
panel |
| CPA |
closest
point of approach |
| CPA |
collision
prediction and alerting |
| CPC |
controller-pilot
communications |
| CPC |
cabin
pressure controller |
| CPC |
cursor
position control |
| CPCI |
computer
program configuration item |
| CPCS |
cabin
pressure control system |
| CPDLC |
controller-pilot
data link communications |
| CPE |
circular
position error |
| CPI |
continuous
process improvement |
| CPM |
core
processor module |
| CPM |
critical
path method |
| CPS |
cabin
pressure sensor |
| CPS |
central
processing system |
| CPU |
central
processing unit |
| C/R |
command/response |
| CR |
change
of request |
| CR |
contrast
ratio |
| CR |
connection
request |
| CRC |
cyclic
redundancy checking/code |
| CRD |
current
routing domain |
| CRDA |
cooperative
research and development agreement |
| CRM |
crew/cockpit
resource management |
| CRPA |
controlled
reception pattern antenna |
| CRISD |
computer
resources integrated support document |
| CRM |
collision
risk model |
| CRM |
crew
resource management |
| CRR |
cutover
readiness review |
| CRS |
course |
| CRT |
cathode
ray tube |
| CRZ |
cruise |
| CS |
common
service |
| CSC |
common
signaling channel |
| CSC |
cargo
system controller |
| CSC |
computer
software component |
| CSCI |
computer
software configuration item |
| CSF |
command/status
frame |
| CSMA |
carrier
sense multiple access |
| CSMA/CD |
carrier
sense multiple access with collision detection |
| CSCP |
cabin
system control panel |
| CSDB |
commercial
standard data bus |
| CSDS |
cargo
smoke detector system |
| CSEU |
control
systems electronics unit |
| CSMM |
crash
survivable memory modules |
| CSMU |
cabin
system management unit |
| C/SOIT |
communications/surveillance
operational implementation team |
| CSPA |
closely
spaced parallel approach |
| CSTAC |
Commercial
Space Transportation Advisory Committee (FAA) |
| CSU |
configuration
strapping unit |
| CSU |
channel
service unit |
| CSU |
computer
software unit |
| CTA |
control
area |
| CTA |
controlled
time of arrival |
| CTAF |
common
traffic advisory frequency |
| CTAI |
cowl
thermal anti-icing |
| CTAS |
center
TRACON automation system |
| CTC |
cabin
temperature controller |
| CTL |
control |
| CTMO |
centralized
air traffic flow management organization |
| CTOL |
conventional
takeoff and landing |
| CTR |
control
zone |
| CTR |
center |
| CTRD |
configuration
test requirements document |
| CTRL |
control |
| CTS |
clear
to send |
| CTS |
conformance
test suite |
| CTU |
cabin
telecommunications unit |
| CU |
combiner
unit (HUD) |
| CU |
channel
utilization |
| CU |
control
unit |
| CUG |
closed
user group |
| C/UT |
code/unit
test |
| CUTE |
common
use terminal equipment |
| CV/DFDR |
cockpit
voice and digital flight data recorder |
| CVR |
cockpit
voice recorder |
| CVRCP |
cockpit
voice recorder control panel |
| CW |
continuous
wave |
| CW |
clockwise |
| CWI |
continuous
wave interference |
| CWP |
controller/ed
working position |
| CWS |
control
wheel steering |
| D |
|
| D8PSK |
differential
8-phase-shift keying |
| DA |
descent
advisor |
| DA |
design
authority |
| DA |
digital-to-analog |
| DABS |
discrete
addressable beacon system |
| DADC |
digital
air data computer |
| DADS |
digital
air data system |
| DAP |
digital
service access product |
| DAR |
data
access recorder |
| DARC |
direct
access radar channel |
| DARP |
dynamic
aircraft route planning |
| DARPA |
Defense
Advanced Research Projects Agency |
| D-ATIS |
digital
automatic terminal information service |
| DB |
database |
| dB |
decibel |
| dBA |
dB
adjusted |
| DBI |
downlink
block identifier |
| dBI |
dB
referenced to an isotropic antenna |
| dBI |
decibels
above isotopic circular |
| dBM |
dB
below 1 milliwatt |
| DBS |
direct
broadcast satellite |
| DBU |
database
unit |
| DBU |
dial
backup |
| dBW |
dB-watts
or referenced to 1 watt |
| DC |
disconnect
confirm |
| DC |
direct
current |
| DCAS |
digital
control audio system |
| DCD |
double
channel duplex |
| DCE |
data
communications equipment |
| DCGF |
data
conversion gateway function |
| DCL |
departure
clearance (European) |
| DCMF |
data
communication management function |
| DCMS |
data
communication management system |
| DCN |
document/drawing/design
change notice |
| DCP |
data
communication process |
| DCP |
display
control panel |
| DCS |
double
channel simplex |
| DCU |
data
concentration unit |
| DCV |
directional
control valve |
| DD |
data
delivery |
| DDA |
digital
differential analyzer |
| DDD |
dual
disk drive |
| DDM |
difference
in depth of modulation |
| DDP |
declarations
of design and performance |
| DDR |
draft
document review |
| DDS |
data
link delivery of expected taxi clearances |
| DDS |
direct
digital synthesizer |
| DDT |
downlink
data transfer |
| DECCA |
a
navigation system widely used by European shipping |
| DER |
designated
engineering representative |
| DFA |
direction
finding antenna |
| DFCS |
digital
flight control system |
| DFDAF |
digital
flight data acquisition function |
| DFDAMU |
digital
flight data acquisition management unit |
| DFDAU |
digital
flight data acquisition unit |
| DFDR |
digital
flight data recorder |
| DFDU |
digital
flight data unit |
| DFIDU |
dual
function interactive display unit |
| DFIU |
digital
flight instrument unit |
| DFS |
digital
frequency select |
| DFS |
Deutsche
Flugsicherung GmbH (Germany) |
| DFU |
digital
function unit |
| DGNSS |
differential
GNSS |
| DGPS |
differential
GPS |
| DH |
decision
height |
| DI |
data
interrupt |
| DIFAX |
digital
facsimile |
| DIP |
data
interrupt program |
| DIR |
director |
| DIR/INTC |
direct
intercept |
| DISC |
disconnect |
| DISCH |
discharge |
| DIST |
distance |
| DITS |
data
information transfer system |
| DL |
data
link |
| DL |
downlink |
| DLAP |
data
link application processor |
| DLC |
data
link control |
| DLCI |
data
link control identifier |
| DLE |
data
link entity |
| DLK |
data
link (AEEC) |
| DLL |
data
link layer |
| DLM |
data
link management unit |
| DLME |
data
link and message engineering |
| DL/MSU |
data
loader/mass storage unit |
| DLORT |
data
link operational requirements team |
| DLP |
data
link processor |
| DLS |
data
link service/system |
| DLU |
download
unit |
| DM |
disconnected
mode |
| DMA |
direct
memory access |
| DME |
distance
measuring equipment |
| DME/N |
DME
normal |
| DME/P |
DME
precision |
| DMM |
data
memory module |
| DMS |
debris
monitoring sensor |
| DMS |
data
link management system |
| DMU |
data
management unit |
| DoD |
Department
of Defense |
| DoT |
Department
of Transportation |
| DOTS |
dynamic
ocean tracking system |
| DPI |
dots
per inch |
| DPR |
dual
port RAM |
| DPSK |
differential
phase shift keying |
| DR |
dead
reckoning |
| DRAM |
dynamic
random access memory |
| DRER |
designated
radio engineering representative (FAA) |
| DRN |
document
release notice |
| DSAD |
digital
service access device |
| DSARC |
defense
system acquisition review cycle |
| DSB |
double
side band |
| DSB-AM |
DSB,
full carrier digital amplitude modulation |
| DSDU |
data
signal display unit |
| DSF |
display
system function |
| DSP |
digital
signal processor |
| DSP |
display
select panel |
| DSP |
domain
specific part |
| DSPDRV |
display
driver |
| DSR |
display
system replacement |
| DSS |
decision
support services |
| DSU |
data
signaling unit |
| DTD |
data
terminal display |
| DTD |
document
type definition |
| DT&E |
development
test and evaluation |
| DTE |
data
terminal equipment |
| DTG |
distance-to-go |
| DTM |
demonstration
test milestone |
| DTMF |
dual
tone multifrequency (telephone) |
| DTPDU |
data
protocol data unit |
| D-TOC |
digital
transfer of communications |
| DTU |
data
transfer unit |
| DU |
display
unit |
| DUAT |
direct
user access terminal |
| DVD |
digital
video disc |
| DVF |
demonstration
and validation facility |
| DVM |
digital
voltmeter |
| DWAN |
direct
WAN |
| E |
|
| EAA |
Experimental
Aircraft Association |
| EACARS |
enhanced
ACARS |
| EAD |
European
AIS data base (Eurocontrol) |
| EADI |
electronic
attitude director indicator |
| EAI |
engine
anti-ice |
| EANPG |
European
Air Navigation Planning Group |
| EAP |
engine
alert processor |
| EAROM |
electrically
alterable ROM |
| EAS |
equivalent
airspeed |
| EARTS |
en
route automated radar tracking system |
| EASIE |
enhanced
ATM and Mode S implementation in Europe |
| EATCHIP |
European
air traffic control harmonization & integration program |
| EATMS |
European
ATM System (Eurocontrol) |
| ECAC |
European
Civil Aviation Conference |
| ECACNAV |
Eurocontrol
navigation Web site |
| ECAM |
electronic
caution alert module |
| ECC |
error
correcting code |
| ECEF |
earth-centered,
earth-fixed |
| ECL |
emitter
coupler logic |
| ECMP |
electronic
component management system |
| ECN |
engineering
change notice |
| ECO |
engineering
change order |
| ECP |
EICAS
control panel |
| ECP |
engineering
change proposal |
| ECS |
engineering
compiler system |
| ECS |
environmental
control system |
| ECS |
event
criterion subfield |
| ECSL |
left
environmental control system card |
| ECSMC |
ECS
miscellaneous card |
| ECSR |
right
environmental control system card |
| ED |
EICAS
display |
| E/D |
end-of-descent |
| EDA |
electronic
design automation |
| EDAC |
error
detection and correction |
| EDARC |
enhanced
direct access radar channel |
| EDC |
error
detection and correction |
| EDDS |
electronic
document distribution service |
| EDI |
electronic
data interchange |
| EDI |
engine
data interface |
| EDIF |
engine
data interface function |
| EDIU |
engine
data interface unit |
| EDMS |
electronic
data management system |
| EDP |
electronic
data processing |
| EDP |
engineering
development pallet |
| EDP |
engine
driven pump |
| EDS |
explosive
detection system |
| EDU |
electronic
display unit |
| EE |
electrical
engineer |
| EE |
electronics
equipment |
| EEAS |
enhanced
en-route automation system |
| EEC |
Eurocontrol
Experimental Center |
| EEC |
electronic
engine control |
| EEPROM |
electrical
erasable programmable ROM |
| EEU |
ELMS
electronics unit |
| EFB |
electronic
flight bag |
| EFC |
expected
further clearance |
| EFD |
electronic
flight display |
| EFDAS |
European
logical flight data server(Eurocontrol) |
| EFDP |
European
flight data processing(Eurocontrol) |
| EFIC |
electronic
flight instrument controller |
| EFIP |
electronic
flight instrument processor |
| EFIS |
electronic
flight instrument system |
| EFIS CP |
EFIS
control panel |
| EGIHO |
expedited
ground-initiated handoff |
| EGNOS |
European
Geostationary Overlay System |
| EGP |
exterior
gateway protocol |
| EGPWS |
enhanced
ground proximity warning system |
| EGT |
exhaust
gas temperature |
| EHSI |
electronic
horizontal situation indicator |
| EHV |
electro-hydraulic
valve |
| EIA |
Electronic
Industries Association |
| EIA |
Electrical
Institute of America |
| EICAS |
engine
indication and crew alert system |
| EICASC |
EICAS
controls |
| EIPI |
extended
initial protocol identifier |
| EIRP |
earth
incident radiated power |
| EIS |
electronic
instrument system |
| EIS |
engine
indication system |
| EIS |
environmental
impact statement |
| EISA |
extended
industry standard architecture |
| EIU |
electronic
interface unit |
| ELEC |
electrical |
| ELM |
extended
length message |
| ELMS |
electrical
load management system |
| ELS |
electronic
library system |
| ELT |
emergency
locator transmitter |
| EM |
element
manager |
| EM |
electromagnetic |
| EMATS |
endurance
management air traffic system |
| EMC |
electromagnetic
compatibility |
| EMC |
entertainment
multiplexer controller |
| EMER |
emergency |
| EMI |
electromagnetic
interference |
| EMS |
emergency
medical services |
| EMS |
engine
management system |
| ENG |
engine |
| ENOC |
engineering
network operations center |
| E/O |
engine-out |
| EOD |
end
of day |
| EOM |
end
of message |
| EOT |
end
of text |
| EP |
engineering
project |
| EP |
external
power |
| EPC |
engineering
project contractor |
| EPCS |
engine
propulsion control system |
| E-PIREPS |
electronic
pilot reports |
| EPLD |
electronically
programmable logic device |
| EPR |
engine
pressure ratio |
| EPROM |
erasable
programmable ROM |
| EPS |
electrical
power system |
| ERPDU |
error
protocol data unit |
| ERB |
Engineering
Review Board |
| ERD |
end
routing domain |
| ERP |
eye
reference point |
| ERP PDU |
echo
replay protocol data unit |
| ERQ PDU |
echo
request protocol data unit |
| ERU |
engine
replay unit |
| ES |
end
system |
| ESA |
European
Space Agency |
| ESAS |
electronic
situation awareness system |
| ESAS |
enhanced
situational awareness system |
| E-Scan |
electronic
scanning |
| ESD |
electrostatic
discharge |
| ESDS |
electrostatic
sensitive devices |
| ESH |
end
system hello |
| ESID |
engine
and system indication display |
| ESIS |
engine
and system indication system |
| ESS |
environmental
stress screening |
| ESS |
electronic
switching system |
| ESSD |
electrostatic
sensitive devices |
| ESU |
environmental
sensor unit |
| ETA |
estimated
time of arrival |
| ETAS |
enhanced
TRACON/tower automation system |
| ETB |
end
of block (ASCII/IA5 character) |
| ETB |
engineering
test bed |
| ETC |
estimated
time of completion |
| ETD |
estimated
time of departure |
| ETI |
elapsed
time indicator |
| ETM |
elapsed
time measurement |
| ETMS |
engine-trend
monitoring services |
| ETMS |
enhanced
traffic management system |
| ETOP |
extended
twin-engine operations |
| ETRC |
expected
taxi ramp clearances |
| ETVS |
enhanced
terminal voice switch |
| ETX |
end
of transmission |
| EUAFS |
enhanced
upper air forecast system |
| EUPS |
external
uninterruptible power supply |
| EURATN |
European
ATN |
| EURET |
European
research on transport systems |
| EUROCAE |
European
Organization for Civil Aviation Equipment (European equivalent of RTCA) |
| EV |
earned
value |
| EVM |
error
vector magnitude |
| F |
|
| F |
fahrenheit |
| FA |
final
approach |
| FAA |
Federal
Aviation Administration (U.S.) |
| FAA/EURO |
FAA/Eurocontrol
R&D committee |
| FAATC |
FAA
Technical Center |
| FAC |
flight
augmentation computer |
| FADEC |
full
authority digital engine/electronic control |
| FAF |
final
approach fix |
| FAI |
first
article inspection |
| FANS |
Future
Air Navigation System (ICAO) |
| FAR |
federal
acquisition regulation |
| FAR |
federal
aviation regulation |
| FAST |
final
approach spacing tool |
| FAT |
factory
acceptance test |
| FBL |
fly
by light |
| FBO |
fixed-base
operator |
| FBW |
fly
by wire |
| FC |
functional
capability |
| FC |
foot
candles |
| FCA |
functional
configuration audit |
| FCC |
flight
control computer |
| FCC |
Federal
Communications Commission |
| FCDC |
flight
critical direct current |
| FCP |
flight
control processor |
| FCP |
flight
control panel |
| FCS |
frame
check sequence |
| FD |
flight
dynamics/director |
| FD |
final
data |
| FDAF |
flight
data acquisition function |
| FDB |
flight
plan data bank |
| FDDI |
fiber
distribution data interface |
| FDEP |
flight
data entry panel |
| FDH |
flight
deck handset |
| FDI |
fault
detection and isolation |
| FDIMU |
flight
data interface management unit |
| FDIO |
flight
data input/output |
| FDM |
frequency
division multiplex |
| FDMA |
frequency
division multiple access |
| FDPS |
flight
data processing system |
| FDR |
flight
data recorder |
| FDRS |
flight
data recorder system |
| FDP |
flight
data processor |
| F&E |
facilities
and equipment |
| FEATS |
future
European air traffic management system |
| FEC |
forward
error correction |
| FEP |
front-end
processor |
| FF |
fuel
flow |
| FFIC |
free
flight implementation committee |
| FFS |
full
flight simulator |
| FGC |
flight
guidance computer |
| FHA |
functional
hazard assessment |
| FIB |
forwarding
information base |
| FIFO |
first
in, first out |
| FIR |
flight
information region |
| FIS |
flight
information services |
| FIS-B |
FIS-broadcast |
| FIX |
position
in space usually on aircraft’s flight plan |
| FL |
flight
level |
| FL |
foot
lampert |
| FLCH |
flight
level change |
| FLIR |
forward-looking
infrared |
| FLW |
forward-looking
windshear radar |
| FM |
frequency
modulation |
| FMA |
flight
mode annunciator |
| FMAC |
Frequency
Management Advisory Council |
| FMC |
flight
management control/computer |
| FMCF |
flight
management computer function |
| FMCS |
flight
management computer system |
| FMCW |
frequency-modulated
continuous wave |
| FMEA |
failure
mode and effects analysis |
| FMF |
flight
management function |
| FMP |
flight
mode panel |
| FMS |
flight
management system |
| FMSG |
Frequency
Management Study Group (ICAO) |
| FMU |
fuel
metering unit |
| F/O |
first
officer |
| FOC |
full
operational capability |
| FOC |
fuel/oil
cooler |
| FODA |
flight
operations data assurance |
| FOG |
fiber
optic gyro |
| FOQA |
flight
operational quality assurance |
| FOV |
field
of view |
| FPA |
focal
plane array |
| FPA |
flight
path angle |
| FPAC |
flight
path acceleration |
| FPC |
flight
profile comparator |
| FPGA |
field
programmable gate array |
| FPM |
feet
per minute |
| FPV |
flight
path vector |
| FQIS |
fuel
quality indicating system |
| FQPU |
fuel
quality processor unit |
| FQR |
formal
qualification review |
| FR |
frame
relay |
| FRA |
flap
retraction altitude |
| FRAD |
frame
relay access device |
| FRM |
frame
reject mode |
| FRMR |
frame
reject |
| FRP |
Federal
Radionavigation Plan |
| FRPA |
fixed
reception pattern antenna |
| FRQ |
frequency |
| FSAS |
flight
service automation system |
| FSE |
FANS
systems engineering |
| FSE |
field
service engineer |
| FSEMC |
Flight
Simulator Engineering and Maintenance Conference |
| FSEU |
flap
slat electronics unit |
| FSF |
Flight
Safety Foundation |
| FSM |
flight
schedule monitoring |
| FSS |
flight
service station |
| FSWE |
FANS
software engineering |
| FT |
functional
test |
| FTE |
flight
technical error |
| FTP |
file
transfer protocol |
| FTPP |
fault
tolerant power panel |
| FVHF |
future
VHF system study (Eurocontrol) |
| FW |
failure
warning |
| FW |
firewall
router |
| FWC |
flight
warning computer |
| FWD |
forward |
| FWS |
flight
warning system |
| FY |
fiscal
year |
| G |
|
| G/A |
ground/air
or ground-to-air |
| GA |
general
aviation |
| GA |
go-around |
| GAAS |
gallium
arsenide |
| GACS |
genetic
ATN communications service |
| GAIT |
ground-based
augmentation and integrity technique |
| GAMA |
General
Aviation Manufacturers Association |
| GAO |
General
Accounting Office |
| GATM |
global
ATM |
| GBAS |
ground-based
augmentation system |
| GBST |
ground
based software tool |
| Gbyte |
gigabyte
(billion bytes) |
| GCA |
ground-controlled
approach |
| GCAS |
ground
collision avoidance system |
| GCB |
generator
circuit breaker |
| GCC |
ground
cluster controller (ACARS) |
| GCS |
ground
clutter suppression |
| GCU |
generator
control unit |
| GDAP |
growing
danger of acronym proliferation |
| GDLP |
ground
data link processor |
| GDOP |
geometric
dilution of precision |
| GDP |
ground
delay program |
| GENOT |
general
notice |
| GEO |
geosynchronous/geostationary
earth orbit |
| GEP |
ground
entry point |
| GES |
ground
earth station |
| GFE |
government
furnished equipment |
| GFI |
general
format identifier |
| GFSK |
Gaussian
frequency shift keying |
| GG |
graphics
generator |
| G/G |
ground/ground |
| GGR |
G/G
router |
| GGS |
GPS
ground station |
| GGTFM |
ground-ground
traffic flow management |
| GH |
ground
handling |
| GHz |
gigahertz |
| GI |
group
identifier |
| GIB |
GNSS
integrity broadcast |
| GIC |
GNSS
integrity channel |
| GIC |
GPS
integrity channel |
| GICB |
ground-initiated
comm-B |
| GIHO |
ground
initiated handoff |
| GIP |
government-industry
partnership |
| GIS |
geodetic
information system |
| GIS |
graphical
information system |
| GL |
ground
location (ACARS/AFEPS) |
| GL |
group
length |
| GLC |
geographic
locator codes |
| GLNS |
GPS
landing and navigation system |
| GLONASS |
Global
Navigation Satellite System (Russia) |
| GLS |
GPS
landing system |
| GLU |
GPS
landing unit |
| GM |
guidance
material |
| GMC |
ground
movement control |
| GMDS |
ground
mobile data service |
| GMT |
Greenwich
mean time |
| GMU |
GPS
monitoring unit |
| GNA |
global
network architecture |
| GNE |
gross
navigational error |
| GNR |
global
navigation receiver |
| GNSS |
global
navigation satellite system |
| GNSSP |
GNSS
Panel (ICAO) |
| GOS |
grade
of service |
| GOSIP |
government
open systems interconnection profile |
| GPADIRS |
global
positioning, air data, inertial reference system |
| GPCBT |
guidelines
for the production of computer-based training (Eurocontrol) |
| GP&C |
global
positioning and communications |
| GPIB |
general
purpose instrument bus |
| GPP |
general
purpose processor |
| GPS |
Global
Positioning System (Navstar) |
| GPS L1 |
GPS
L1 frequency |
| GPSSU |
GPS
sensor unit |
| GPU |
ground
power unit |
| GPWC |
ground
proximity warning computer |
| GPWS |
ground
proximity warning system |
| GR |
ground
router |
| GRIP |
gridded
binary (National Weather Service model output) |
| GRP |
geographic
reference point |
| GS |
ground
speed/station |
| G/S |
glideslope |
| GSC |
ground
station controller (ACARS) |
| GSE |
ground
support equipment |
| GSIF |
ground
station information frame |
| GSM |
global
systems mobile |
| GSMS |
ground
station management system |
| GSP |
glare
shield panel |
| GTC |
data
link ground terminal computer |
| GUI |
graphical
user interface |
| GVE |
graphics
vector engine |
| GW |
gateway |
| GWS |
graphical
weather services |
| H |
|
| HAD |
hardware
architecture document |
| HARS |
high
altitude route system |
| HCI |
human-computer
interface |
| HCP |
heads-up
control panel |
| HDG |
heading |
| HDG SEL |
HDG
select |
| HDISK |
hard
disk |
| HDL |
hybrid
data link |
| HDLC |
high-level
data link control |
| HDLC-B |
HDLC-balanced |
| HDLMS |
hybrid
data link management system |
| HDOP |
horizontal
dilution of precision |
| HDP |
hardware
development plan |
| HDTV |
high-definition
television |
| HE |
altitude
error |
| HF |
high
frequency |
| HF |
human
factors |
| HFDL |
high
frequency data link |
| HFDM |
high-frequency
data modem |
| HFDR |
high
frequency data radio |
| HFI |
human
factors integration |
| HFNPDU |
high
frequency network protocol data unit |
| HFS |
high
frequency system |
| HFSG |
human
factor study group |
| HFSNL |
high
frequency subnetwork layer |
| HFWG |
human
factors working group |
| HGA |
high
gain antenna |
| HGAS |
HGA
system |
| HGC |
head-up
guidance computer |
| HGS |
head-up
guidance system |
| HGS |
HFDL
ground station |
| HHLD |
heading
hold |
| HIL |
horizontal
integrity limit |
| HIRF |
high
intensity radiated field |
| HLCS |
high
lift control system |
| HLE |
higher
layer entity |
| HLL |
high
level language |
| HMI |
human-machine
interface |
| HMOS |
high
density metal oxide semiconductor |
| HMU |
height
monitoring unit |
| HO |
handoff |
| HOCSR |
host/oceanic
computer system replacement |
| HOW |
hand-over
word |
| HP |
high
pressure |
| HP |
holding
pattern |
| hPa |
hecto
Pascal |
| HPA |
high
power amplifier |
| HPC |
high
pressure compressor |
| HPR |
high
power relay |
| HPSOV |
high
pressure shutoff valve |
| HPT |
high
pressure turbine |
| HRD |
home
routing domain |
| HRM |
home
regional manager |
| HS-DSAD |
high
speed frame relay service access device |
| HSI |
horizontal
situation indicator |
| HSIT |
hardware
and software integration test |
| HSL |
heading
select |
| HSR |
high
stability reference |
| HSRP |
hot
standby routing protocol |
| HTC |
highest
two-way channel |
| HUD |
head
up display |
| HVPS |
high
voltage power supply |
| HWCI |
hardware
configuration item |
| HX |
heat
exchanger |
| HYD |
hydraulic |
| HYDIM |
HYD
interface module |
| Hz |
Hertz
(cycles per second) |
| I |
|
| I&TE |
integration
and test engineering |
| IACSP |
international
aeronautical communications service provider |
| IAGS |
integrated
ARINC ground station |
| IANA |
Internet
assigned number authority |
| IAOA |
indicated
angle of attack |
| IAOPA |
International
Council of Aircraft Owners and Pilots Association |
| IAPS |
integrated
avionics processing system |
| IARP |
inverse
address resolution protocol |
| IAS |
indicated
airspeed |
| IAT |
investment
analysis team |
| IATA |
International
Air Transport Association |
| IBAC |
International
Business Aviation Council |
| IC |
integrated
circuit |
| IC |
intercabinet |
| ICAO |
International
Civil Aviation Organization |
| ICARD |
ICAO
five-letter name code & route designator system |
| ICC |
IAPS
card cage |
| ICCAIA |
International
Coordinating Council of Aerospace Industries Association |
| ICD |
interface
control document/drawing |
| ICD |
interactive
design center |
| ICD |
installation
control drawing |
| ICM |
interline
communications manual |
| ICMP |
Internet
control message protocol |
| ICNIA |
integrated
communications, navigation and identification avionics |
| ICS |
interface
control specification |
| ICSS |
integrated
communication switching system |
| ICU |
integrated
control unit |
| ICU |
instrument
comparator unit |
| ID |
identifier/identification |
| IDC |
internal
diagnostic capabilities |
| IDC |
indicator
display/control |
| IDD |
interface
design document |
| IDEN |
integrated
digital enhanced network |
| IDG |
integrated
drive generator |
| IDI |
initial
domain identifier |
| IDP |
initial
domain part |
| IDRP |
interdomain
routing protocol |
| IDS |
integrated
display system |
| IDS |
inter-domain
system |
| IDS |
ice
detection system |
| IDU |
interactive
display unit |
| IEC |
International
Electrotechnical Commission |
| IEC |
IAPS
environmental control module |
| IEC |
International
Engineering Consortium |
| IED |
insertion
extraction device |
| IEEE |
Institute
of Electrical and Electronics Engineers |
| IF |
intermediate
frequency |
| IFALPA |
International
Federation of Airline Pilots Association |
| IFATCA |
International
Federation of Air Traffic Controllers’ Association |
| IFC |
indicated
final cost |
| IFE |
in-flight
entertainment |
| IFPS |
integrated
initial flight plan processing system |
| IFR |
instrument
flight rules |
| IFRB |
International
Frequency Registration Board |
| IGES |
intermediate
ground earth station |
| IGES |
standardized
graphics exchange file |
| IGIA |
Interagency
Group on International Aviation |
| IGV |
inlet
guide vane |
| ILA |
International
Law Association |
| ILM |
independent
landing monitor |
| ILS |
instrument
landing system |
| ILSP |
integrated
logistics support plan |
| IMA |
integrated
modular avionics |
| IMC |
instrument
meteorological conditions |
| IMG |
implementation
manager group |
| INFO |
information
frame |
| INAV |
interactive
navigation |
| IN.HG. |
inches
of mercury |
| INMARSAT |
International
Maritime Satellite Organization |
| INMS |
integrated
network management system |
| INS |
inertial
navigation system |
| INTELSAT |
International
Telecommunications Satellite Organization |
| InterNIC |
Internet
Network Information Center |
| I/O |
input/output |
| IOC |
initial
operating capability |
| ION |
Institute
of Navigation |
| IOR |
Indian
Ocean region |
| IOS |
Internet
operating system |
| IOT & E |
initial
operational test and evaluation |
| IP |
Internet
protocol |
| IPACG |
Informal
Pacific ATC Coordination Group |
| IPC |
interprocess
communication |
| IPC |
intermediate
pressure compressor |
| IPD |
industrial
products division |
| IPI |
initial
protocol identifier |
| IPL |
illustrated
parts list |
| IPR |
Internet
protocol router |
| IPT |
integrated
product team |
| IPT |
intermediate
pressure turbine |
| IR |
infrared |
| IRAC |
Interdepartmental
Radio Advisory Committee |
| IRP |
integrated
refuel panel |
| IRR |
internal
rate of return |
| IRS |
inertial
reference system |
| IRS |
interface
requirements specification |
| IRU |
inertial
reference unit |
| IS |
intermediate
system |
| ISA |
industry
standard architecture |
| ISA |
Instrument
Society of America |
| ISC |
integrated
systems controller |
| ISDN |
integrated
services digital network |
| ISDOS |
information
system design and optimization system |
| ISH |
intermediate
system hello |
| ISLN |
isolation |
| ISO |
International
Standards Organization |
| ISO PA |
ISO
protocol architecture |
| ISP |
integrated
switching panel |
| ISR |
interrupt
service routine |
| ISSN |
intermediate
system subnetwork |
| ISSS |
initial
sector suite system/subsystem |
| ISU |
initial
signal unit |
| IT |
information
technology |
| ITM |
IT
management |
| ITS |
integrated
test system |
| ITSE |
integrated
test and support environment |
| ITU |
International
Telecommunications Union |
| ITWS |
integrated
terminal weather system |
| IUPS |
internal
uninterruptible power supply |
| IV |
isolation
valve |
| J |
| JAA |
Joint
Aviation Authority |
| JAR |
joint
airworthiness requirement |
| JAR-AWO |
JAR-all
weather operations |
| JATO |
jet
assisted takeoff |
| JCAB |
Japanese
Civil Aviation Bureau |
| JFET |
junction
field effect transistor |
| JPS |
journal
processing system |
| JRC |
Joint
Resource Council |
| J/S |
jammer-to-signal
ratio |
| JSAT |
joint
system acceptance test |
| JTAG |
Joint
Test Action Group |
| JTIDS |
joint
tactical information distribution system |
| JV |
joint
venture |
| K |
|
| KB |
kilobytes
(thousand bytes) |
| KBITS |
kilobits |
| Kbps |
kilobits
per second |
| kgls |
kinematic
GPS landing system |
| KHz |
kilohertz
(1000 cycles per second) |
| KPS |
KB
per second |
| KTS |
knots |
| KVA |
kilovolt-ampere |
| KW |
kilowatt |
| L |
| L1 |
L-band
carrier (1575.42 MHz) |
| L2 |
L-band
carrier (1227.6 MHz) |
| LAAS |
local
area augmentation system |
| LACAC |
Latin
American Civil Aviation Commission |
| LADGPS |
local
area differential GPS |
| LAHSO |
land
and hold short operation |
| LAN |
local
area network |
| LAPB |
link
access protocol, balanced |
| LAT |
latitude |
| LBA |
Luftfahrt-Bundesamt
(Germany) |
| LCA |
layered
component architecture |
| LCC |
leadless
chip carrier |
| LCD |
liquid
crystal display |
| LCF |
link
control field |
| LCI |
logical
channel identifier |
| LCN |
local
communications network |
| LCP |
lighting
control panel |
| LCR |
link
connection refusal |
| LDA |
landing
directional aid |
| LDA |
laterally
displaced approach |
| LDCC |
leaded
chip carrier |
| LDCS |
local
departure control system |
| LDGPS |
local
area differential global positioning satellite |
| lDOC |
long
distance operational control |
| LDRCL |
low
density radio _ communications link |
| LDU |
lamp
driver unit |
| LE |
link
establish |
| LED |
light-emitting
diode |
| LEO |
low
earth orbiting |
| LF |
low
frequency |
| LFR |
LF
radio range |
| LGA |
low
gain antenna |
| LHP |
lighting
HIRF protection |
| LIMNATRAN |
limited
North Atlantic regional air navigation |
| LINCS |
long-haul/leased
interfacility national airspace communications system |
| LISN |
line
impedance stabilization network |
| LLC |
logical
link control |
| LLWAS |
low-level
windshear alert system |
| LME |
link
management entity |
| LMI |
logical
management interface |
| LMM |
locator
middle marker |
| LMT |
local
mean time |
| lNA |
low-noise
amplifier |
| LNAV |
lateral
navigation |
| LOB |
left
outboard |
| LOC |
localizer/location |
| LOM |
locator
outer marker |
| LON |
longitude |
| LORAN |
long-range
air navigation |
| LOS |
line
of sight |
| LPB |
loss
prevention bulletin |
| LPC |
low
pressure compressor |
| LPDU |
link
protocol data unit |
| LPT |
low
pressure turbine |
| LRC |
long-range
cruise |
| LRM |
line
replaceable module |
| LRR |
long-range
radar |
| LRU |
line
replaceable unit |
| LSB |
least
significant bit |
| LSB |
lower
sideband |
| LSD |
least
significant digit |
| LS-DSAD |
low
speed frame relay service access device |
| LS-FRAD |
low
speed frame relay access device |
| LSI |
large
scale integration |
| LSK |
line
select key |
| LSN |
local
subnetwork |
| LSP |
link
state PDU |
| LTC |
lowest
two-way channel |
| LV |
lower
sideband voice |
| LVL |
level |
| LVDT |
linear
voltage differential transducer |
| LVPS |
low
voltage power supply |
| M |
|
| M |
mach
number |
| MA |
message
assurance |
| MAA |
maximum
authorized IFR altitude |
| MAC |
medium
access controller |
| MACC |
military
area control center |
| MACS |
multiple
access communication system |
| MAHWP |
missed
approach holding waypoint |
| MALDT |
mean
administrative and logistics delay time |
| MAN |
metropolitan
area network |
| MAP |
missed
approach |
| MAPt |
missed
approach point |
| M/ASI |
mach/airspeed
indicator |
| MASPS |
minimum
aviation system performance standards |
| MAST |
multiaircraft
simulation terminal |
| MAT |
maintenance
access terminal |
| MAV |
micro
air vehicle |
| MAWP |
missed
approached waypoint |
| MAX |
maximum |
| MB |
marker
beacon |
| MBE |
multiple
bit error |
| MBER |
minimum
bit error rate |
| MBPS |
megabytes
per second |
| MC |
master
change |
| MCA |
minimum
crossing altitude |
| MCB |
microwave
circuit board |
| MCC |
maintenance
control computer |
| MCDP |
maintenance
control display panel |
| MCDU |
multifunctional
control display unit |
| MCN |
manufacturing
control number |
| MCP |
maintenance
control panel |
| MCT |
max
continuous thrust |
| MCU |
multifunction/modular
concept unit |
| MDA |
minimum
descent altitude |
| MDC |
maintenance
diagnostic computer |
| MDCRS |
Meteorological
Data Collection and Reporting Service |
| MDL |
multipurpose
data link |
| MDR |
mode
digital radio |
| MDS |
minimum
discernible signal |
| MDT |
maintenance
display terminal |
| MDT |
mean
downtime |
| MEA |
minimum
en route altitude |
| MEC |
main
equipment center |
| MEL |
minimum
equipment list |
| MEO |
medium
earth orbit |
| MES |
main
engine start |
| MET |
meteorology |
| METAR |
meteorological
aviation routine weather report |
| MF |
medium
frequency |
| MFCP |
multifunction
control display panel |
| MFD |
multifunction
display |
| MFDS |
MFD
system |
| MFDU |
MFD
unit |
| MFIT |
mean
fault isolation time |
| MFM |
maintenance
fault memory |
| MGSCU |
main
gear steering control unit |
| MGR |
manager |
| MHD |
magnetic
hard drive |
| MHS |
message
handling service |
| MHz |
megahertz |
| MIB |
management
information base |
| MIC |
microphone |
| MicroEARTS |
micro
en route automated radar tracking system |
| MIDU |
multi-purpose
interactive display unit |
| MILSPEC |
military
specification |
| MIL-STD |
military
standard |
| MIMO |
multi-input/multi-output |
| MIN |
minimum/minute |
| MIPS |
management
interface protocol specification |
| MIPS |
million
instructions per second |
| MKR |
marker |
| MLA |
maneuver
limited altitude |
| MLM |
mid-level
management |
| MLS |
microwave
landing system |
| MLW |
maximum
landing weight |
| MM |
mass
memory |
| MMI |
man-machine
interface |
| MMIC |
monolithic
microwave integrated circuit |
| MMR |
multimode
receiver |
| MMS |
maintenance
management system |
| MMW |
millimeter
wave |
| MNCID |
management
network category interaction diagram |
| MNPS |
minimum
navigation performance specification |
| MNS |
managed
network service |
| MO |
managed
object |
| MO |
magneto-optical |
| MOA |
military
operation area |
| MOA |
memorandum
of agreement |
| MOCA |
minimum
obstacle clearance altitude |
| MOD |
modification |
| MOD |
magneto-optical
drive |
| MODEM |
modulator/demodulator |
| MOPR |
minimum
operational performance requirements |
| MOPS |
minimum
operational performance standards |
| MORA |
minimum
off-route altitude |
| MOS |
metal
oxide semiconductor |
| MOU |
memorandum
of understanding |
| MPAR |
multipurpose
airport radar |
| MPCU |
multiport
protocol converter unit |
| MPEL |
maximum
permissible exposure level |
| MPS |
maintenance
processor system/ subsystem |
| MRA |
minimum
reception altitude |
| MRR |
manufacturing
revision request |
| MRT |
mean
repair time |
| Ms |
millisecond |
| MSB |
most
significant bit |
| MSC |
message
sequence chart |
| MSCP |
mobile
satellite service provider |
| MSD |
mass
storage device |
| MSG |
message |
| MSI |
medium
scale integration |
| MSK |
minimum
shift keying |
| MSL |
mean
sea level |
| M-SNDCF |
mobile-subnetwork
dependent convergence function |
| MSP |
Mode
S specific protocol |
| MSSR |
monopulse
secondary surveillance radar |
| MSSS |
Mode
S specific services |
| MSU |
mode
select unit |
| MT |
minimum
time |
| MTA |
message
transfer agent |
| MTBF |
mean
time between failures |
| MTBO |
mean
time between outages |
| MTBR |
mean
time between removal/repairs |
| MTTR |
mean
time to repair |
| MTTRS |
mean
time to restore service |
| MTBUR |
mean
time between unscheduled removal |
| MTBUR |
mean
time between unit replacements |
| MTC |
maintenance
terminal cabinet |
| MTD |
maintenance
terminal display |
| MTF |
maintenance
terminal function |
| MTI |
moving
target indicator |
| MTM |
module
test and maintenance |
| MTMBIU |
MTM
bus interface unit |
| MTTDA |
mean
time to dispatch alert |
| MTTF |
mean
time to failure |
| MTTM |
mean
time to maintenance |
| MTTMA |
mean
time to maintenance alert |
| MTTR |
mean
time to repair |
| MTTUR |
mean
time to unscheduled removal |
| MU |
management
unit |
| MUS |
minimum
use specification |
| MUSE |
multiuser
system environment |
| MUX |
multiplexer |
| MWARA |
major
world air route area |
| N |
|
| N1 |
fan
speed |
| N2 |
intermediate
compressor speed |
| N3 |
high-speed
compressor |
| N/A |
not
applicable |
| NACA |
National
Advisory Committee for Aeronautics |
| NCAR |
National
Center for Atmospheric Research |
| NADIN |
national
airspace data interchange network |
| NADIN II |
NADIN
packet switch |
| NAILS |
national
airspace integrated logistics support |
| NAK |
negative
acknowledgment |
| NAS |
national
airspace system (FAA) |
| NAS |
national
aircraft standard |
| NASA |
National
Aeronautics and Space Administration |
| NASPALS |
national
airspace system precision approach and landing system |
| NAT |
North
Atlantic region |
| NAT |
North
Atlantic tracks |
| NATA |
National
Air Transport Association Inc. |
| NATCA |
National
Air Traffic Controllers Association |
| NAT/NAM/PAC |
North
Atlantic/North American/Pacific |
| NATS |
National
Air Traffic Services (UK) |
| NATS |
North
Atlantic track system |
| NAT TFG |
NAT
Traffic Forecasting Group |
| NAV |
navigation |
| NAVAID |
navigational
aid |
| NBAA |
National
Business Aircraft Association |
| NC |
numerical
control |
| NCD |
no
computed data |
| NCI |
not
currently implemented |
| NCP |
NAS
change proposal |
| NCS |
network
control system |
| NCS |
network
coordination station |
| ND |
navigation
display |
| NDB |
non-directional
radio beacon |
| NDI |
nondestructive
inspection |
| NDI |
non-developmental
item |
| NE |
network
element |
| NEMA |
National
Electrical Manufacturers Association |
| NESDIS |
national
environmental satellite data and information service |
| NET |
network
entity title |
| NEXCOM |
Next
generation air/ground Communications system |
| NEXRAD |
next-generation
weather radar |
| NFF |
no
fault found |
| NIAC |
NAS
Information Architecture Committee (FAA) |
| NICE |
NAT
implementation management group cost effectiveness |
| NIMS |
NAS
infrastructure management system |
| NIR |
network
interface router |
| NIRV |
network
interface router VDL |
| NIS |
not
in service |
| NISC |
NAS
information security coordination |
| NIST |
National
Institute of Standards and Technology |
| NIU |
North
American ISDN User Forum (NIST) |
| NIP |
network
interface processor |
| NL |
network
layer |
| NLM |
network
loadable module |
| NLP |
network
layer protocol |
| NLR |
Netherlands
National Aerospace Laboratory |
| NM |
network
management |
| NM |
nautical
mile |
| NMC |
National
Meteorological Center |
| NMCCD |
network
management category class diagram |
| NMCD |
network
management category diagram |
| NMF |
network
management function |
| NMIRS |
network
management interface requirements specification |
| NMP |
network
management plan |
| NMS |
network
management system |
| NOAA |
National
Oceanic and Atmospheric Administration |
| NOC |
network
operations center |
| NOC |
note
of change |
| NOCAR |
North
Atlantic oceanic concept and requirements |
| NOCC |
national
operational control center |
| NO COM |
no
communication |
| NOI |
notice
of inquiry (FCC) |
| NOPAC |
North
Pacific |
| NOTAM |
notice
to airmen |
| NOTUS |
notice
to users (ARINC) |
| NPA |
non-precision
approach |
| NPDU |
network
protocol data unit |
| NR |
network
router |
| NRD |
network
routing domain |
| NRP |
national
route program |
| NRZ |
non-return
to zero |
| NS |
network
service |
| NSAP |
network
service access point |
| NSC |
network
service center |
| NSDU |
network
service data unit |
| NSEL |
NSAP
selection |
| NSEU |
neutron
single event upset |
| NSSL |
National
Severe Storms Laboratory |
| NTIA |
National
Telecommunications and Information Administration (U.S.) |
| NTF |
no
trouble found |
| NTSM |
National
Transportation Safety Board (U.S.) |
| NUI |
network
user identification |
| NVM |
non-volatile
memory |
| NVRAM |
non-volatile
RAM |
| NWS |
National
Weather Service (U.S.) |
| O |
|
| O&M |
operations
and maintenance |
| OAC |
oceanic
area control center |
| OAS |
oceanic
automation system |
| OASIS |
operational
and supportability implementation system |
| OASYS |
obstacle
avoidance system |
| OAT |
operational
acceptance test |
| OAT |
outside
air temperature |
| OATS |
orbit
and attitude tracking system |
| OBP |
operational
build plan |
| OBS |
omnibearing
selector |
| OBS |
optical
bypass switch |
| OCA |
oceanic
control area |
| OCC |
operations
control center |
| OCD |
oceanic
clearance delivery |
| OCIG |
Oceanic
Communications Improvement Group |
| OCP |
oceanic
clearance processor |
| ODA |
open
document architecture |
| ODAPS |
oceanic
display and planning system |
| ODIAC |
operational
requirements for ATM air/ground data communications (Eurocontrol) |
| ODID |
operational
display and input development |
| ODL |
optical
data link |
| ODL |
oceanic
data link |
| OEM |
original
equipment manufacturer |
| OEU |
overhead
electronics unit |
| OFDM |
orthogonal
frequency division multiplexing |
| OFDPS |
oceanic
flight data processing system |
| OFP |
operational
flight program |
| OGE |
operational
ground equipment |
| OHU |
overhead
unit (HUD) |
| OID |
object
identifier |
| OJT |
on-the-job
training |
| OLAN |
onboard
local area network |
| OLDI |
on-line
data interchange |
| OM |
outer
marker |
| OMB |
Office
of Management and Budget (U.S.) |
| OMS |
onboard
maintenance system |
| OMT |
object
modeling technique |
| OOA |
object-oriented
analysis |
| OOD |
object-oriented
design |
| OOOI |
out/off/on/in |
| OPAS |
overhead
panel ARINC 629 system |
| OPBC |
overhead
panel bus controller |
| OPS |
operations |
| OPS |
OPS
per second |
| OPSPECS |
OPS
specifications |
| OPU |
overspeed
protection unit |
| O-QAR |
optical
quick access recorder |
| OR |
operational
requirements |
| ORD |
operations
readiness demonstration |
| ORD |
operational
requirements document |
| OS |
operating
system |
| OSDS |
oceanic
systems development support |
| OSE |
open
systems environment |
| OSI |
open
systems interface/ interconnection |
| OSIE |
OSI
environment |
| OSI-RM |
OSI
reference model |
| OSPF |
open
shortest path first |
| OSR |
order
status report |
| OTA |
Office
of Technology Assessment (U.S.) |
| OT&E |
operational
test and evaluation |
| OTFP |
operational
traffic flow planning |
| OTH |
over
the horizon |
| OTP |
Office
of Telecommunications Policy (U.S.) |
| OTS |
off
the shelf |
| OVHT |
overheat |
| P |
|
| P2FEP |
PETAL-II
front-end processor |
| P3 I |
preplanned
product improvements |
| PA |
passenger
address |
| PA |
power
amplifier |
| PAC |
path
attenuation compensation |
| PACIS |
passenger
address and communication interphone system |
| PAD |
packet
assembler-disassembler |
| PAL |
programmable
array logic |
| PAM |
pulse
amplitude modulation |
| PAMRI |
peripheral
adapter module replacement item |
| PANS-OPS |
procedures
for air navigation services-aircraft operations |
| PAR |
precision
approach radar |
| PAT |
process
action team |
| PAU |
passenger
address unit |
| PAWES |
performance
assessment and workload evaluation |
| PAX |
passenger |
| PBD |
place
bearing/distance (waypoint) |
| PBID |
post
burn-in data |
| PBX |
public/private
branch exchange |
| PC |
printed
circuit |
| PC |
personal
computer |
| PCA |
physical
configuration audit |
| P-Code |
GPS
precision code |
| PCB |
printed
circuit board |
| PCC |
pilot
controller communication |
| PCI |
peripheral
component interface (32-bit local bus) |
| PCI |
protocol
control information |
| PCM |
pulse
code modulation |
| PCMIA |
personal
computer memory card interface association |
| PCO |
protocol
converter unit |
| PCU |
program
coordination office |
| PCU |
passenger
control unit |
| PCU |
power
control unit |
| PD |
profile
descent |
| PDB |
performance
data base |
| PDC |
pre-departure
clearance |
| PDCU |
panel
data concentrator unit |
| PDD |
package
design document |
| PDDI |
product
definition data interface |
| PDF |
primary
display function |
| PDL |
program
design language |
| PDM |
predefined
controller text message |
| PDM |
project
development manager |
| P-DME |
precision
DME |
| PDN |
public
data network |
| PDOP |
position
dilution of precision |
| PDR |
preliminary
design review |
| PDS |
persistent
data storage |
| PDS |
primary
display system |
| PDU |
protocol
data unit |
| PECT |
peer
entity contact table |
| PED |
portable
electronic device |
| PER |
packed
encoding rule |
| PERT |
program
evaluation and review technique |
| PETAL |
preliminary
Eurcontrol test of air/ground data link |
| P/F |
poll/final |
| PF |
power
factor |
| PF |
pilot
flying |
| pFAST |
passive
final approach spacing tool |
| PFC |
primary
flight computer |
| PFCS |
primary
flight control system |
| PFD |
primary
flight display |
| PHARE |
Program
for Harmonized ATM research in Europe (Eurocontrol) |
| PHY |
physical |
| PI |
parameter
identifier |
| PIA |
performance,
integrity and availability |
| PICS |
protocol
implementation conformance statements |
| PID |
parameter
identifier |
| PID |
primitive
identifier |
| PID |
process
ID |
| PIREP |
pilot
report |
| P&L |
profit
and loss |
| PL |
parameter
length |
| PL |
project
leader |
| PLA |
power
lever angle |
| PM |
program
manager |
| PM |
phase
modulation |
| PMA |
parts
manufacturer approval |
| PMA |
permanent
magnet alternator |
| PMAT |
portable
maintenance access terminal |
| PMC |
provisional
memory cover |
| PMC |
PCI
mezzanine card |
| PMG |
permanent
magnet generator |
| PMOS |
p-type
metal oxide semiconductor |
| PMP |
project/program
management plan |
| PMS |
performance
management system |
| PN |
pseudo
noise |
| PNCS |
performance
navigation computer system |
| PND |
primary
navigation display |
| PNF |
pilot
not flying |
| PNR |
point
of no return |
| PO |
part
of |
| POA |
plain
old ACARS |
| POC |
point
of contact |
| POC |
proof
of concept |
| POH |
pilot’s
operating handbook |
| POP |
point
of presence |
| POR |
Pacific
Ocean region |
| POTS |
plain
old telephone system/service |
| PPDU |
physical
layer protocol data unit |
| PPI |
planned
position indicator |
| PPL |
processor-to-processor
link |
| PPM |
pulse
position modulation |
| PPM |
pages
per minute |
| PPM |
parts
per million |
| PPP |
point-to-point
protocol |
| PPS |
packets
per second |
| PPS |
pulse
per second |
| PPS |
precise
positioning service |
| PRAIM |
predictive
RAIM |
| PRF |
pulse
repetition frequency |
| PRI |
primary
rate interface |
| PRM |
precision
runway monitor |
| PROM |
programmable
ROM |
| PRN |
pseudo
random noise |
| PRSOV |
pressure
regulating and shutoff valve |
| P/RST |
press
to reset |
| PS |
power
supply |
| PSA |
PS
assembly |
| PSD |
port
sharing device |
| PSDN |
packet
switched data network |
| PSE |
packet-switching
exchange |
| PSEU |
proximity
sensor electronic unit |
| PSL |
projected
service life |
| PSL/PSA |
problem
statement language/ problem statement analyzer |
| PSM |
power
supply modules |
| PSN |
packet
switching network |
| PSPL |
preferred
standard parts list |
| PSR |
primary
surveillance radar |
| PSS |
proximity
sensor system |
| PSTN |
public
switched telephone network |
| PSU |
passenger
service unit |
| PT |
total
pressure |
| PTD |
performance
test domain |
| PTI |
packet
type identifier |
| PTM |
peripheral
transition module (I/O interface for SBC) |
| PTR |
production
test requirements |
| PTS |
problem
tracking system |
| PTSD |
production
test specification document |
| PTT |
push
to talk |
| PTU |
power
transfer unit |
| PV |
parameter
value |
| PVC |
permanent
virtual circuit |
| PVD |
plan
view display |
| PVT |
position,
velocity, time |
| PWM |
pulse-width
modulation |
| PWR |
power |
| Q |
|
| QA |
quality
assurance |
| QAP |
QA
plan |
| QAR |
quick
access recorder |
| QDR |
quality
defect report |
| QDR |
quality
deficiency report |
| QEC |
quadrantral
error corrector |
| QM |
quality
management |
| QMP |
QM
plan |
| QMS |
QM
system |
| QOP |
quality
operating procedures |
| QRH |
quick
reference handbook |
| QOS |
quality
of service |
| QP |
quality
procedure |
| QT |
qualification
test |
| QVL |
qualified
vendor list |
| R |
|
| RA |
routing
area |
| RAA |
Regional
Airline Association |
| RAAF |
Royal
Australian Air Force |
| RAC-GAT... |
Russian/American
Coordinating Group for Air Traffic Control. |
| RAD |
rapid
application development |
| RAF |
requirements
analysis folder |
| RAF |
Royal
Air Force (UK) |
| RAI |
radio
altimeter indicator |
| RAIM |
receiver
autonomous integrity monitoring |
| RALA |
request
automatic line adapter |
| RALT |
radar
altimeter |
| RAM |
random
access memory |
| RCE |
radio
control equipment |
| RCL |
radio
communications link |
| RCO |
remote
communications outlet |
| RCP |
radio
control panel |
| RCR |
routing
and circuit restoral |
| RCU |
remote
control unit |
| RC&W |
rack
connectors and wiring |
| R&D |
research
and development |
| RD |
routing
domain |
| RDARA |
regional
domestic air route area |
| RDC |
routing
domain confederation |
| RDF |
RD
format |
| RDI |
RD
identifier |
| RDP |
radar
data processing |
| RDR |
radar |
| RDSS |
radio
determination satellite system |
| RDT&E |
research,
development, test and evaluation |
| RE&D |
research,
engineering and development |
| REDAC |
Research,
Engineering and Development Advisory Committee (FAA) |
| REQ |
request |
| RER |
residual
error rate |
| RF |
radio
frequency |
| RFC |
request
for comments |
| RFI |
radio
frequency interference |
| RFI |
request
for information |
| RFO |
request
for offer |
| RFP |
request
for proposal |
| RFQ |
request
for quote |
| RFU |
radio
frequency unit |
| RGB |
red
green blue |
| RGCSP |
Review
of the General Concept of Separation Panel (ICAO) |
| RGS |
relay
ground station |
| RH |
radio
handler |
| RHF |
ridiculously
high frequency |
| RHO |
response
on handoff |
| R&M |
reliability
and maintainability |
| RHSM |
reduced
horizontal separation minima |
| RIB |
routing
information base |
| RIP |
routing
information protocol |
| RISC |
reduced
instruction set computer |
| RLE |
response
on link establishment |
| RLS |
reliable
link service |
| RM |
regional
manager |
| RM&A |
reliability,
maintainability and availability |
| RMI |
radio
magnetic indicator |
| RMMS |
remote
maintenance monitoring system |
| RMP |
risk
management plan |
| RMS |
risk
management system |
| RMS |
root
mean square |
| RNAV |
area
navigation |
| RNP |
required
navigational performance |
| RNR |
receive
not ready |
| RO |
radio
operator |
| ROA |
recognized
operating agency |
| ROC |
rate
of climb |
| ROC |
rest
of operational capability |
| ROD |
rate
of descent |
| ROM |
read
only memory |
| ROM |
rough
order of magnitude |
| RON |
remain
over night |
| RP |
routing
protocol |
| RPDE |
rapid
preliminary development effort |
| RPM |
revolutions
per minute |
| RPOA |
Recognized
Private Operation Agency (CCITT) |
| RR |
receive
ready |
| RRI |
router
reference implementation |
| RSDP |
reliable
sequencing delivery-confirmation protocol |
| RSN |
regional
subnetwork |
| RSP |
required
surveillance performance |
| RSSI |
received
signal strength indicator |
| RT |
radio
telecommunication |
| RTA |
required
time of arrival |
| RTC |
red
time clock |
| RTCA |
Radio
Technical Commission for Aeronautics |
| RTCM |
Radio
Technical Commission for Maritime Services |
| RTK |
real-time
kinematic |
| RTM |
radio
transmission module |
| RTOS |
real
time operating system |
| RTO |
rejected
takeoff |
| RTR |
remote
transmitter receiver site |
| RTS |
request
to send |
| RTTI |
run-time
type identification |
| RTU |
radio
tuning unit |
| RU |
rack
unit (1 inch) |
| RVR |
runway
visual range |
| RVSM |
reduced
vertical separation minimum |
| R/W |
read/write |
| RWM |
R/W
memory |
| RWR |
radar
warning receiver |
| RX |
receiver |
| RZ |
return
to zero |
| S |
|
| S0 |
Segment
0 |
| S1 |
Segment
1 |
| SA |
selective
availability |
| SA |
situational
awareness |
| SABENA |
Societe
Anonyme Belge d’Exploitation de la Navigation Aerienne |
| SAD |
software
architecture document |
| SADT |
software
architecture design team |
| SAE |
Society
of Automotive Engineers |
| SAI |
System
Architecture and Interfaces Subcommittee (AEEC) |
| SAM |
slot
allocation management |
| SAM |
South
American region |
| SAP |
service
access points |
| SAPPHIRE |
satellite
and aircraft database program for system integrity research |
| SAR |
search
and rescue |
| SARPS |
standards
and recommended practices (ICAO) |
| SAS |
station
address set |
| SASS |
surveillance
analysis support system (Eurocontrol) |
| SAT |
systems
and acceptance testing |
| SATCOM |
satellite
communications |
| SATNAV |
satellite
navigation |
| SB |
service
bulletin |
| SBAS |
satellite-based
augmentation system |
| SBC |
single
board computer |
| SBD |
schematic
block diagram |
| SC |
special
committee (RTCA) |
| SCAT |
special
category |
| SCCI |
system
controller and cockpit indicator |
| SCD |
system
category diagram |
| SCPC |
single
carrier per channel |
| SCSI |
small
computer system interface |
| SDD |
system/software
design document |
| SDDN |
software-defined
data network |
| SDF |
software
development folder |
| SDI |
source
destination identifier |
| SDLC |
synchronous
data link control |
| SDM |
software
development methodology |
| SDP |
software
development plan |
| SDR |
system
design review |
| SDRAM |
synchronous
dynamic random access memory |
| SDU |
satellite
data unit |
| SE |
systems
engineering |
| SEI |
Software
Engineering Institute |
| SEL |
select
identifier |
| SELCAL |
selective
calling |
| SEMP |
system
engineering management plan |
| SETA |
system
engineering and technical assistance (contractor) |
| SEWG |
security
working group |
| SFDF |
subsystem
fault detection function |
| SFE |
supplier-furnished
equipment |
| SFT |
software
fault tolerance |
| SICAS |
secondary
surveillance radar improvements and collision avoidance systems |
| SICASP |
SICAS
Panel (ICAO) |
| SID |
standard
instrument departure |
| SIGMET |
significant
meteorological information |
| SI&T |
software
integration and test |
| SISG |
Systems
Implementation Subgroup (IATA) |
| SIT |
system
integration and test |
| SITA |
Societe
Internationale de Telecommunications Aeronautiques |
| SITD |
system
integration test description |
| SITP |
system
integration test plan |
| SITP/D |
SITP/description |
| SITR |
system
integration test report |
| SLA |
service
level agreement |
| SLC |
synchronous
link control |
| SLH |
system
level health |
| SLI |
system
level interface |
| SLM |
standard
length message |
| SLoC |
source
lines of code |
| SLUC |
system
level use case |
| SLV |
service
level verifier |
| SM |
systems
management |
| SMA |
surface
movement advisor |
| SMART |
standard
modular avionics repair and test |
| SMB |
serial
mezzanine board |
| SMD |
surface
mount device |
| SMDS |
switch
multimegabit data service |
| SME |
system
management entity |
| SMGCS |
surface
movement guidance and control systems |
| SMI |
standard
message identifier |
| SMR |
specialized
mobile radio |
| SMS |
spectrum
monitoring system |
| SMT |
standard
message text |
| SN |
subnetwork |
| SNA |
system
network architecture |
| SNAC |
SN
access |
| SNCR |
SN
connection reference |
| SNDCF |
SN
dependent convergence function |
| SNDCF/P |
SNDCF/protocol |
| SNICF |
SN
independent convergence function |
| SNLE |
SN
link establishment |
| SNMP |
simple
network management protocol |
| SNMPv1 |
SNMP
version 1 |
| SNPA |
SN
point of attachment |
| SNPDU |
SN
protocol data unit |
| SNR |
signal-to-noise
ratio |
| SNSDU |
SN
service data unit |
| SOH |
start
of header |
| SOI |
system
operator instructions |
| SOIA |
simultaneous
offset instrument approach |
| SOM |
software
operator manual |
| SOIT |
satellite
operational implementation team |
| SON |
statement
of operational need |
| SOW |
statement
of work |
| SPCR |
system
problem/change report |
| SPICE |
STANS
preparation integrator for CNS/ATM environment (Eurocontrol) |
| SPM |
software
programmer’s manual |
| SPS |
software
product specification |
| SPS |
standard
positioning service |
| SQ |
service
quality |
| SQAP |
software
quality assurance plan |
| SQB |
SQ/billing
processor |
| SQD |
SQ
data |
| SQP |
signal
quality parameter |
| SRAM |
static
random access memory |
| SREJ |
selective
reject |
| SRM |
selective
reject mode |
| SRR |
system/software
requirements review |
| SRS |
software
requirements specification |
| SRU |
shop
replaceable unit |
| SSA |
source
selection activity |
| SSAC |
source
selection advisory committee |
| SSB |
single
side band |
| SSDD |
system/segment
design document |
| SSEB |
source
selection evaluation board |
| SSR |
secondary
surveillance radar (ICAO/FAA) |
| SSS |
surveillance
server system |
| SSS |
system/segment
specification |
| SSU |
subsequent
signal unit |
| STANAG |
standardization
agreement |
| STANS |
simulation
for a total air navigation system (Eurocontrol) |
| STAR |
standard
terminal arrival route |
| STARS |
standard
terminal automation replacement system (FAA) |
| STB |
systems
test bed |
| STC |
supplemental
type certificate (FAA) |
| STCA |
short-term
traffic advisory |
| STD |
standard |
| STD |
system
technical description |
| STDMA |
synchronized
time division multiple access |
| STF |
SATCOM
tracking facility |
| STIU |
satellite
telecommunications intermediate unit |
| STM |
serial
transition module |
| STP |
system
test plan |
| STP/D |
STP/description |
| STR |
system
technical report |
| STR |
system
test report |
| STVS |
small
tower voice switch |
| STX |
start
of text |
| SU |
signal
unit |
| SUA |
special
use airspace |
| SUM |
software
user manual |
| SUPPS |
regional
supplementary procedures |
| SUT |
system
under test |
| SVC |
switched
virtual circuit |
| SvRR |
service
readiness review |
| SVU |
satellite
voice unit |
| SW |
software |
| SWIT |
software
integration and test |
| SWIT |
switched
virtual circuit |
| SWTP |
software
technology plan |
| SWTRR |
software
test readiness review |
| SYS |
system
identifier |
| SYSCAT-B |
system
category-B (FAA message format) |
| SysCI |
system
configuration item |
| SysDD |
system
design document |
| T |
|
| TA |
traffic
advisory (TCAS) |
| TACAN |
tactical
air navigation |
| TAF |
terminal
aerodrome forecast |
| TAF |
terminal
area forecast (ICAO) |
| TAOARC |
Terminal
Area Operations Aviation Rulemaking Committee (FAA) |
| TAR |
trials
ATN router |
| TAP |
tower
automation program |
| TASS |
terminal
air surveillance system |
| TAWS |
terrain
avoidance warning system |
| TC |
transport
connection |
| TCA |
terminal
control area |
| TCAS |
traffic
alert collision avoidance system |
| TCP |
transmission
control protocol |
| TCP/IP |
TCP/Internet
protocol |
| TCS |
tower
communications system |
| TD |
technical
documentation |
| TDLS |
tower
data link services |
| TDM |
time
division multiplexer |
| TDMA |
time
division multiple access |
| TDST |
tower
data services terminal |
| TDWR |
terminal
Doppler weather radar |
| T&E |
test
and evaluation |
| TECOM |
technical
committee |
| TEI |
text
element identifiers |
| TELCO |
telephone
company |
| TERPS |
terminal
en route procedures |
| TERPS |
terminal
instrument procedures (FAA) |
| TES |
trials
end system (for ATN) |
| TFC |
traffic |
| TFM |
traffic
flow management |
| TFR |
temporary
flight restriction |
| TFTP |
trivial
file transfer protocol |
| TG |
transmission
gate |
| TG4 |
maximum
time between GSIF’s timer |
| TG5 |
maximum
link overlap timer |
| TGT |
target |
| TIA |
Telecommunications
Industry Association |
| TIP |
tower
integration program |
| TIS |
traffic
information service |
| TL |
terminal
location (ACARS/AFEPS) |
| TLS |
target
level of safety |
| T&M |
time
and materials |
| TM |
timer-media
access control |
| TM |
technical
manual |
| TMA |
traffic
management advisor |
| TMC |
traffic
management coordinator |
| TMC |
test,
monitor and control |
| TM&O |
telecommunications
management and operations |
| TMS-T |
traffic
management system transition |
| TMU |
traffic
management unit |
| TO |
technical
order |
| TOC |
transfer
of communications |
| TOR |
terms
of reference (ICAO/FAA) |
| TP |
test
point |
| TP4 |
transport
protocol class 4 |
| TPDU |
transport
protocol data unit |
| TPF |
transaction
processing facility |
| TPL |
terminal
permission list (ACARS/AFEPS) |
| TPM |
technical
performance management |
| TQM |
total
quality management |
| TRACON |
terminal
radar approach control |
| TRB |
technical
review board |
| TRD |
transit
routing domain |
| TRR |
test
readiness review |
| TS |
time
source |
| TS |
transport
service |
| TSA |
technical
services agreement |
| TSAP |
transport
service access point |
| TSC |
term
service commitment |
| TSC |
transportation
system center |
| TSDU |
transport
service data unit |
| TSG |
technical
subgroup |
| TSG |
technical
standards and guidelines |
| TSO |
technical
standard order (FAA) |
| TSP |
transmitted
signal power |
| TSS |
technology
support and services |
| TSTM |
time
source transition module |
| TT |
test
tools |
| TURB |
turbulence |
| TVE |
total
vertical error |
| TWDL |
two-way
data link communications |
| TWIP |
terminal
weather information for pilots |
| TWP |
technical
work program |
| TX |
transmit |
| U |
|
| UA |
unnumbered
acknowledgment |
| UART |
universal
asynchronous receiver transmitter |
| UAT |
universal
access transceiver |
| UATP |
universal
air travel plan |
| UAV |
unmanned
air vehicle |
| UBI |
uplink
block identifier |
| UCI |
user
computer interface |
| UD |
user
data |
| UDP |
user
datagram protocol |
| UHF |
ultra-high
frequency |
| UI |
unnumbered
information |
| UIR |
upper
information region |
| UL |
uplink |
| ULWG |
upper
layer working group |
| UML |
unified
modeling language |
| UP |
universal
platform |
| UPRM |
universal
platform resource management |
| UPS |
uninterruptible
power supply |
| UPSMS |
UPS
management supply |
| URET |
user
request evaluation tool |
| URL |
universal
resource locator |
| USC |
United
States code |
| UTC |
universal
coordinated time |
| UTP |
unshielded
twisted pair |
| UUT |
unit
under test |
| UWB |
ultra
wide-band |
| V |
|
| V |
volt |
| v8208 |
vdlM2
8208 protocol |
| VAC |
volts
alternating current |
| VAGR |
vDLM2
AGR |
| VANS |
value-added
network services |
| VAR |
value-added
reseller |
| VAP |
value-added
processor |
| VAS |
value-added
services |
| VC |
virtual
circuit |
| VCB |
virtual
circuit bridge |
| VCP |
video
cassette player |
| VCU |
VDL
control unit |
| VDC |
volts
direct current |
| VDD |
version
description document |
| VDL |
VHF
data link |
| VDLM2 |
VDL
Mode 2 |
| VDLM3 |
VDL
Mode 3 |
| VDLM4 |
VDL
Mode 4 |
| VDR |
VHF
data radio |
| VDU |
visual
display unit |
| VER |
version |
| VFR |
visual
flight rules |
| VGA |
video
graphics adapter |
| VGS |
VDLM2
ground station |
| VHF |
very
high frequency |
| VLSI |
very
large scale integration |
| VMC |
visual
meteorological conditions |
| VME |
versa
module Eurocard bus |
| VME |
VHF
management entity (VMEbus) |
| VMECC |
versa
module Eurocard card cage |
| VMON |
VNMS
health monitoring |
| VNAV |
vertical
navigation |
| VNMS |
VDLM2
network management system |
| VOCRAD |
voice
radio |
| VOR |
VHF
omni-directional radio range |
| VPN |
virtual
private network |
| VRG |
VDL
reference guide |
| VSAT |
very
small aperture terminal |
| VSCS |
voice
switching and control system |
| VSD |
VDL
specific DTE address |
| VSM |
vertical
separation minimum |
| VSRS |
voice
switch replacement system |
| VSWR |
voltage
standing wave radio |
| VTAM |
virtual
telecommunications access method |
| VTOL |
vertical
takeoff and landing |
| VTS |
vessel
traffic system |
| V&V |
verification
and validation |
| W |
|
| WAAS |
wide
area augmentation system |
| WACS |
wireless
airport communication system |
| WADGPS |
wide
area differential GPS |
| WAFC |
world
area forecast center |
| WAN |
wide
area network |
| WARC |
World
Administrative Radio Conference |
| WARP |
weather
and radar processor |
| WASP |
wireless
access service point |
| WATRS |
west
Atlantic route structure |
| WBS |
work
breakdown structure |
| WC |
waypoint
capture |
| WG |
working
group |
| WJHTC |
William
J. Hughes Technical Center (FAA) |
| WGS |
world
geodetic system |
| WMO |
World
Meteorological Organization |
| WMSCR |
weather
message switching center replacement |
| WP |
work
procedure |
| WPR |
waypoint
position report |
| WPT |
waypoint |
| WSDDM |
weather
support for deicing decision-making |
| WSR |
weather
surveillance radar |
| WWW |
world
wide Web |
| WX |
weather |
| WXR |
weather
radar |
| X |
|
| X |
cancel |
| XID |
exchange
identification |
| XFR |
transfer |
| XMIT |
transmit |
| XMTR |
transmitter |
| XS |
Societe
Internationale de Telecommunications Aeronautiques (SITA) |
| XTI |
X-open
transport interface |
| XTP |
express
transfer protocol |
| Y |
|
| Z |
|
| Z |
Zulu
(Greenwich mean time) |
| ZFW |
zero
fuel weight |
| ZOC |
zone
of convergence |
| ZVF |
zero
velocity filter |
