PowerShell/Data/Abbr/aviation.csv

1	ABBR	MEANING
2	3P	Perceive, Process, Perform
3	5P	Plan, Plane, Pilot, Passengers, Programming
4	7500	Transponder code for Aircraft hijacking (ICAO)
5	7600	Transponder code for Radio failure (lost communications, ICAO)
6	7700	Transponder code for Emergency (ICAO)
7	A/A	Air to air TACAN function
8	A/C	Aircraft
9	A/D	Aerodrome
10	A/F	Autofeather
11	A/FD	Airport/Facility Directory
12	A/P	Autopilot
13	A/R	Altitude Rate
14	A300	Airbus A300 twinjet
15	A310	Airbus A310 twinjet
16	A320	Airbus A320 family of twinjets
17	A330	Airbus A330 twinjet
18	A340	Airbus A340 quadjet
19	A350	Airbus A350 twinjet
20	A380	Airbus A380 quadjet
21	AAA	Airport Airspace Analysis
22	AAE	Above Aerodrome Elevation
23	AAF	Airway Facilities Service
24	AAF	Army Air Field
25	AAI	Arrival Aircraft Interval
26	AAI	Airports Authority of India
27	AAIB	Air Accidents Investigation Branch (UK)
28	AAIM	Aircraft Autonomous Integrity Monitoring
29	AAM	Advanced Air Mobility
30	AAMS	Aircraft Arrival Management System
31	AARTS	Army Aviation Radar Training System
32	AAO	Assumed Adverse Obstacle
33	AAS	Airport Advisory Service
34	AB	Air Base, Afterburner
35	ABI	Advanced Boundary Information
36	AC	Aircraft
37	ACAC	Arab Civil Aviation Conference
38	ACAM	Aircraft Continuing Airworthiness Monitoring
39	ACARS	Aircraft Communications Addressing and Reporting System
40	ACAS	Airborne Collision Avoidance System
41	ACC	Area Control Center
42	ACE	Airport airside Capacity Enhancement
43	ACI	Airports Council International
44	ACP	Accept
45	AD	Air Defence
46	ADAC	Abu Dhabi Airports
47	ADEP	Aerodrome of Departure
48	ADES	Aerodrome of Destination
49	ADF	Automatic Direction Finding
50	ADI	Automatic De-Ice and Inhibitor
51	ADIRS	Air Data and Inertial Reference System
52	ADIRU	Air Data Inertial Reference Unit
53	ADIZ	Air Defense Identification Zone
54	ADL	Aeronautical Data Link
55	ADLY	Arrival Delay
56	ADP	Aerodrome dé Paris (Charles de Gaulle)
57	ADP	Automated Data Processing
58	ADS	Automated Distribution System
59	ADS	Automatic Dependent Surveillance
60	ADS-B	Automatic Dependent Surveillance-Broadcast
61	AENA	Aeropuertos Españoles y Navegación Aérea
62	AEO	All Engines Operative
63	AERA	Automated En-Route Air Traffic Control
64	AEW	Airborne Early Warning
65	AF	Air Field
66	AFCS	Automatic Flight Control System
67	AFI	Air Force Instruction
68	AFIS	Aerodrome Flight Information Service
69	AFTN	Aeronautical Fixed Telecommunication Network
70	AFM	Aircraft Flight Manual
71	AGAS	Action Group for ATM Safety (EUROCONTROL)
72	AGL	Above Ground Level
73	AH	Acceleration Height
74	ahdg	alter heading
75	AICS	Aircraft Inventory and Charter System
76	AID	Airport Information Desk
77	AIDS	Aircraft Integrated Data System
78	AIG	Airbus Industries Group
79	AILS	Automatic Instrument Landing System
80	AIM	Aeronautical Information Manual
81	AIP	Aeronautical Information Publication
82	AIPA	Aeronautical Information Production Application
83	AIRAC	Aeronautical Information Regulation And Control
84	AIRMET	Airmen's Meteorological Information
85	AIRNAV	Airports and Navigation Aids Database System
86	AIRNET	Airport Network Simulation Model
87	AIRPAC	Advisor for the Intelligent Resolution of Predicted Aircraft
88	ALO	Aviation Logistics Organization
89	ALP	Airport Layout Plan
90	ALPA	Airlines Pilots Association
91	ALS	Approach Lighting System
92	ALSF	Approach Lighting System With Sequenced Flashing Lights
93	ALSF1	ALS with Sequenced Flashers I
94	ALSF2	ALS with Sequenced Flashers II
95	ALSIP	Approach Lighting System Improvement Plan
96	ALTRV	Altitude Reservation
97	AM	Airfield Management
98	AMAN	Arrival Manager
99	AMASS	Airport Movement Area Safety System
100	AMCC	Air Route Traffic Control Center Maintenance Control Center
101	AMIC	Area Manager in Charge
102	AMIS	Aircraft Management Information System
103	AMOC	Alternative Methods of Compliance
104	AMOS	Automated Meteorological Observation Station
105	AMP	ARINC Message Processor (OR) Airport Master Plan
106	AMS	Acquisition Management System
107	AMT	Aviation Maintenance Technician
108	AMVER	Automated Mutual Assistance Vessel Rescue System
109	ANA	Administration of Air Navigation
110	ANC	Alternate Network Connectivity
111	ANCA	Airport Noise and Capacity Act
112	ANG	Air National Guard
113	ANGB	Air National Guard Base
114	ANMS	Automated Network Monitoring System
115	ANSL	Air Navigation Solutions Ltd. (UK)
116	ANSP	Air Navigation Service Provider
117	AOA	Angle of Attack, Air Operations Area, Airport Operating Area
118	AOB	Airfield Operations Board
119	AOC	Airline Operational Control Center
120	AOCC	Atlantic Operations Control Center
121	AODR	Authorizing Official Designated Representative
122	AOM	Airplane Operating Manual
123	AOPA	Aircraft Owners and Pilots Association
124	AOR	Area of Responsibility
125	AP	Acquisition Plan
126	APB	Acquisition Program Baselines
127	APM	Approach Path Monitor
128	APP	Approach
129	APS	Airport Planning Standard
130	APTS	Automated Personnel Tracking System
131	APU	Auxiliary Power Unit
132	AQAFO	Aeronautical Quality Assurance Field Office
133	AR	Aerial Refueling
134	AR	Aspect Ratio
135	ARAC	Army Radar Approach Control (AAF)
136	ARFOR	Area Forecast
137	ARLNO	Airline Office
138	ARP	Airport Reference Point
139	ARTCC	Air Route Traffic Control Centre
140	ASB	Airspace Block
141	ASDA	Accelerate Stop Distance Available
142	ASDE	Airport Surface Detection Equipment
143	ASDE-X	Airport Surface Detection Equipment, model X
144	ASOS	Automated Surface Observation System
145	ASR	Airport Surveillance Radar
146	ASTERIX	All Purpose Structured Eurocontrol Surveillance Information Exchange
147	ATA	Actual Time of Arrival
148	ATC	Air Traffic Control
149	ATCALS	Air Traffic Control and Landing Systems
150	ATCO	Air Traffic Control Officer
151	ATIS	Automatic Terminal Information Service
152	ATM	Air Traffic Management, Air Traffic Manager
153	ATO	Air Traffic Organization
154	ATPL	Airline Transport Pilot License
155	AURO	Autorotation (by helicopters)
156	AWACS	Airborne Warning And Control System
157	BC	Back Course
158	BAF	Belgian Air Force
159	BASH	Bird/Wildlife Aircraft Strike Hazard
160	BDOC	Base Defense Operations Center
161	BIRTAM	NOTAM on Bird Activity
162	BIT	Build-In Test
163	BITE	Build-In Test Equipment
164	BRNAV	Basic Area Navigation
165	BWB	Blended Wing Body
166	BWC	Bird Watch Condition
167	C2	Command and Control
168	C3	Communication, Command and Control
169	C4I	Communication, Command, Control, Computers and Intelligence
170	CAAC	Civil Aviation Administration of China
171	CAAS	Civil Aviation Authorization of Singapore
172	CAL	Computer Assisted Learning
173	CAMACA	Common Agreed Methodology for Airport airside Capacity Assessment
174	CANAC	Computer Assisted National Air Traffic Control Centre (Belgium)
175	CANSO	Civil Air Navigation Services Organization
176	CARMA	CATC Radar Simulator Allahabad
177	CAS	Calibrated Airspeed
178	CASE	Controlled Airspace Synthetic Environment (Simulator of Alenia Marconi)
179	CAT	Category of Aircraft, Clear Air Turbulence
180	CATC	Civil Air Traffic Control
181	CAVOK	Clouds And Visibility OK
182	C/S	Callsign
183	CBT	Computer-based Training
184	CC	Commander
185	CCBC	Community College Baltimore County
186	CCIS	Closed Circuit Information System
187	CCTLR	Chief Controller
188	CDA	Continuous Descent Approach
189	CDI	Course Deviation Indicator
190	CDM	Collaborative Decision Making
191	CDTI	Cockpit Display of Traffic Information
192	CDU	Cockpit Display Unit
193	CEATS	Central European Air Traffic Services
194	CESC	Chief Executive Standing Conference
195	CFIT	Controlled Flight Into Terrain
196	CFMU	Central Flow Management Unit
197	CFR	Code of Federal Regulations
198	COG	Center of Gravity
199	CON	Control
200	CGD	Combined Graphic Display
201	CISM	Critical Incident Stress Management
202	CLC	Course Line Computer
203	CLNC	Clearance
204	CMA	Controlled Movement Area
205	CMIC	Civil/Military Interface Standing Committee
206	CNS	Communication, Navigation, Surveillance
207	CODA	Central Office for Delay Analysis
208	ConOps	Concept of Operations
209	COPS	Changeover Point(s)
210	CORA	Conflict Resolution Advisory
211	COTS	Commercial Of-The-Shelf
212	CPA	Closest Point of Approach
213	CPDLC	Controller Pilot Data Link Communication
214	CPI	Crash Position Indicator
215	CPL	Commercial Pilot License
216	CRC	Control and Reporting Centre
217	CRDA	Converging Runway Display Aid
218	CREDOS	Crosswind Reduced Separations for Departure Operations
219	CTA	Controlled Area, Controlled Time of Arrival
220	CTAF	Common Traffic Advisory Frequency
221	CTOT	Calculated Take-Off Time
222	CTR	Control Zone or Controlled Traffic Region
223	CV	Vice Commander
224	CVFR	Controlled Visual Flight Rule (flight)
225	CVSM	Conventional Vertical Separation Minimum
226	CW	Continous Wave
227	CW	Cold Weather
228	CWS	Collision Warning System
229	CWP	Controller Working Position
230	CWY	Clearway
231	DA	Density Altitude
232	DAS	DFS Aviation Services (DFS subcompany for services outside Germany)
233	DCIA	Dependent Converging Instrument Approach
234	DECIDE	Detect, Estimate, Choose, Identify, Do, and Evaluate
235	DEL	Delivery
236	DER	Departure End of Runway
237	DFS	Deutsche Flugsicherung (ATC in Germany)
238	DGAC	Direction Générale de l'Aviation Civile
239	DLA	Defense Logistics Agency
240	DP	Departure Procedure
241	DSNA	Direction des Services de la Navigation Aérienne
242	DTI	Direction Technique Innovation
243	DVA	Diverse Vector Area
244	DW	Downwind
245	EAS	Equivalent Airspeed
246	EAVA	Estonian Aviation Academy
247	ECAC	European Civil Aviation Conference
248	eCTOL	Electric Conventional Take-off and Landing
249	ECP	Entry Control Point
250	EFM	Gesellschaft für Enteisen und Flugzeugschleppen
251	EICAS	Engine Instrument Crew Alerting System
252	ELEV	Field Elevation
253	ELT	Emergency Locator Transmitter
254	EOL	Engine-off landing
255	ERPM	Engine Rotations per Minute
256	eSTOL	Electric Short Take-off and Landing
257	ETA	Estimated Time of Arrival, East Transition Area
258	ETL	Effective Translational Lift (for helicopters)
259	ETOPS	Extended-range Twin-engine Operational Performance Standards
260	ETVS	Electronic Terminal Voice Switch
261	eVTOL	Electric Vertical Take-off and Landing
262	FAA	U.S. Federal Aviation Administration
263	FAR	Fuel Air Ratio
264	FAS	Final Approach Segment
265	FAS	Final Approach Speed
266	FAST	Future Aviation Safety Team
267	FAT	Factory Acceptance Test (see also SAT and RAT)
268	FAT	Final Approach Track
269	FATO	Final Approach and Take-off Area
270	FAWP	Final Approach Waypoint
271	FAWS	Flight Advisory Weather Service
272	FBO	Fixed-Base Operator
273	FBW	Fly-by-Wire
274	FCA	Final Cruise Altitude
275	FCC	Federal Communications Commission (USA)
276	FCC	Flight Control Computer
277	FCI	Flight Command Indicator
278	FCL	Flight Crew Licensing
279	FCLP	Field Carrier Landing Practice
280	FCLT	Freeze Calculated Landing Time
281	FCLTP	Flight Crew Licensing and Training Panel (ICAO)
282	FCOM	Flight Crew Operating Manual
283	FCOM	Flight Crew Operations Manual
284	FCPC	Flight Control Primary Computer
285	FE	Field Elevation (highest point of an airport’s usable runways and is measured in height above mean sea level)
286	FIA	Flight Information Area
287	FIR	Flight Information Region
288	FL	Flight Level
289	FLIP	Flight Information Publication
290	FMG	Flughafen München GmbH
291	FMS	Flight Management System
292	FOD	Foreign Object Debris
293	FOV	Field of View
294	FWC	Flight Warning Computer
295	GA	General Aviation, Go Around (VFR)
296	GND	Ground
297	GP	Glide Path
298	GPS	Global Positioning System
299	GS	Ground Speed or Glideslope
300	HEMS	Helicopter Emergency Medical Services
301	HKIA	Hong Kong International Airport
302	HOGE	Hover Out of Ground Effect
303	HOTS	Higher-Order Thinking Skills
304	IAA	Israeli Airport Authority
305	IAF	Israeli Air Force
306	IAS	Indicated airspeed
307	IATA	International Air Transport Association, HQ in Montreal, Canada
308	ICA	Initial Climb Area
309	IFE	In-flight Emergency
310	IFR	Instrument Flight Rules
311	IG	Image Generator
312	IGE	In Ground Effect
313	IGLR	Integrated Ground Lighting and Radar
314	ILS	Instrument Landing System
315	ISA	International Standard Atmosphere
316	IMC	Instrument Meteorological Conditions
317	KAT	Kaufbeuren ATM Training (DFS subcompany)
318	KCAS	Calibrated AirSpeed in Knots
319	KIAS	Indicated Airspeed in Knots
320	KTAS	True AirSpeed in Knots
321	LAA	Lappland Aviation Academy
322	LDA	Landing Distance Available
323	LDAH	Landing Distance Available for Helicopter
324	LH	Lufthansa
325	LITAS	Low Intensity Two Colour Approach System
326	LL	Lower Limit
327	LMUK	Lockheed Martin UK
328	LOD	Level of Detail
329	LTA	Lower Traffic Area
330	LUAW	Line up and wait
331	LVNL	Luchtverkeersleiding Nederland (Air Traffic Control the Netherlands)
332	LVP	Low Visibility Procedures
333	LWINS	Lightweight Inertial Navigation System
334	MA	Missed Approach (IFR)
335	MATS	Malta Air Traffic Services
336	MEA	Minimum En-route Altitude
337	METAR	Meteorological Aerodrome Report
338	MCP	Maximum Continuous Power
339	MGTOW	Maximum Gross Take-off Weight
340	MLW	Maximum Landing Weight
341	MMR	Multi-Mode Receiver
342	MSA	Minimum Safe Altitude
343	MSL	Median Sea Level
344	MSTA	Minimum Safe Turning Altitude
345	MTOW	Maximum Take-Off Weight
346	NATCA	National Air Traffic Controllers Association
347	NATOPS	Naval Aviation Training and Operating Procedures Standardization
348	NATS	National Air Traffic Services (UK)
349	NAVAIDS	Navigational Aids
350	NCOIC	Non-Commissioned Officer in Charge
351	NIMA	National Imagery Mapping Agency
352	NLFS	Night Low Flying System
353	NM	Nautical Mile
354	NORDO	No Radio
355	NOTAM	Notice to Airmen or Notice to Air Missions
356	NUAIR	Northeast UAS Airspace Integration Research (a New York based nonprofit organization)
357	OCS	Obstacle Clearance Surfaces
358	OCTA	Outside Control Areas
359	OEI	One Engine Inoperative
360	ODP	Obstacle Departure Procedure
361	OGE	Out of Ground Effect
362	OFZ	Obstacle Free Zone
363	OJT	On the Job Training
364	OODA	Observation, Orientation, Decision, and Action
365	PA	Pressure Altitude
366	PAPI	Precision Approach Path Indicator
367	PAR	Precision Approach Radar
368	PCAS	Primary Crash Alarm System
369	PIC	Pilot in Command
370	PNF	Pilot Not Flying
371	POH	Pilot's Operating Handbook
372	PPL	Private Pilot's License
373	PMI	Preventative Maintenance Inspection
374	POFZ	Precision Obstacle Free Zone
375	PTAC	Position, Turn, Altitude, Clearance (also known as Approach Clearance)
376	PtF	Permit to Fly
377	QFE	the altimeter setting that will cause the altimeter to read the height above a specific aerodrome or ground level, and therefore read zero on landing
378	QNE	pressure altitude at the landing runway threshold
379	QNH	atmospheric pressure adjusted to mean sea level
380	RADAR	Radio Detection And Ranging
381	RADNET	Radar Network
382	RAIM	Receiver Autonomous Integrity Monitoring (GPS)
383	RAPCON	Radar Approach Control
384	RAT	Reliability Acceptance Test (see also FAT and SAT)
385	RAM	Radar Absorbent Material
386	RAP	Recognised Air Picture
387	RASP	Recognised Air and Surveillance Picture
388	RB	Relative Bearing
389	RBI	Relative Bearing Indicator
390	RBAF	Royal Belgium Armed Forces
391	RCAF	Royal Canadian Air Force
392	RCC	Rescue Co-ordination Centre
393	RCL	Runway Centre Line Lighting
394	RCR	Runway Condition Reading
395	RCS	Radar Cross Section
396	RESA	Runway End Safety Area
397	RET	Rapid Exit Taxiways
398	RF	Radio Frequency
399	RFFS	Rescue and Fire Fighting Services
400	RFM	Rotorcraft Flight Manual
401	RIMCAS	Runway Incursion Monitoring and Conflict Alert System
402	RJAF	Royal Jordanian Air Force
403	RJC	Reject
404	RPI	Runway Point of Intercept
405	RPM	Rotations per Minute
406	ROFZ	Runway Obstacle Free Zone
407	RMI	Radio Magnetic Indicator
408	RNAV	Area Navigation
409	RNP	Required Navigation Performance
410	ROC	Rate Of Climb
411	ROC	Required Obstacle Clearance
412	RPM	Revolutions Per Minute
413	RPS	Radar Position Symbol
414	RRPM	Rotor Rotations per Minute
415	RSA	Runway Safety Area
416	RSAF	Republic of Singapore Air Force
417	RSC	Runway Surface Condition
418	RSI	Remote Status Indicato
419	RSRS	Reduced Same Runway Separation
420	RTCA	Radio Technical Commission for Aeronautics
421	RVR	Runway Visual Range
422	RVSM	Reduced Vertical Separation Minimum
423	RWR	Radar Warning Receiver
424	RWY	Runway
425	SADL	Situational Awareness Data Link
426	SAF	Sustainable Aviation Fuel
427	SAR	Search and Rescue, Synthetic Aperture Radar
428	SARPS	Standards and Recommended Practices (ICAO)
429	SAT	Site Acceptance Test (see also FAT and RAT)
430	SATCO	Senior Air Traffic Control Officer
431	SATCOM	Satellite Communication
432	SATNAV	Satellite Navigation
433	SATSE	State Air Traffic Services Enterprise
434	SCN	Secondary Crash Net
435	SDD	Situation Data Display
436	SEOL	Simulated engine-off landing
437	SELCAL	Selective Calling System
438	SES	Single European Sky
439	SESAME	Single European Sky ATM Master Plan
440	SESAR	Single European Sky ATM Research
441	SFL	Sequencing Flashing Light
442	SFO	Simulated Flameout Operation
443	SI	Selective Interrogation
444	SIAP	Standard Instrument Approach Procedure
445	SID	Standard Instrument Departure
446	SIF	Selective Identification Friend or Foe
447	SIGMET	Significant Meteorological (Information) Report
448	SILs	Sector Inbound Lists
449	SIM	Simulator
450	SKYGUIDE	Air Traffic Control of Switzerland
451	SL	Sea Level
452	SLB	Side lobe Blanking
453	SLC	Side lobe Cancellation
454	SLOC	Slovenia Control
455	SM	Statute Mile
456	SMR	Surface Movement Radar
457	SOF	Supervisor of Flying
458	SOW	Statement of Work
459	SRC	Safety Regulation Commission (EUROCONTROL)
460	SRU	Safety Regulation Unit (EUROCONTROL)
461	SSR	Secondary Surveillance Radar
462	STAR	Standard Arrival Route or Standard Terminal Arrival Route
463	STARS	Standard Terminal Automation Replacement System
464	STB	Stop Bar
465	STCA	Short Term Conflict Alert
466	STD	Synthetic Training Device
467	STDMA	Self-organising Time Division Multiple Access (known as VHF digital link - Mode 4)
468	STNA	Service Technique de la Navigation Aerienne
469	STO	Short Take-Off
470	STOVL	Short Take-Off and Vertical Landing
471	STOL	Short Take-Off and Landing
472	STRATFOR	Eurocontrol Statistics and Forecasts Service
473	SUA	Special Use Airspace
474	SV	Supervisor
475	SVFR	Special Visual Flight Rules
476	SWT	Switch
477	SWY	Stopway
478	SYSCO	System Coordination – Data Exchange and Coordination
479	TA	Terminal Airspace
480	TAA	Terminal Arrival Area
481	TAAM	Total Airspace and Airport Modeller
482	TACAN	Tactical Air Navigation (System)
483	TACS	Theater Air Control System
484	TACTICOS	Tactical Information and Command System
485	TAF	Terminal Aerodrome/Area Forecast
486	TAIS	Tactical Airspace Integration System (US Army)
487	TAIS	Tactical Air Intelligence System
488	TAP	Target Acquisition Protocol
489	TARMAC	Taxi and Ramp Management and Control
490	TAS	Terminal Airspace System
491	TAS	True Air Speed
492	TAWS	Terrain Avoidance and Warning System
493	TCAS	Traffic alert and Collision Avoidance System
494	TCDS	Type Certificate Data Sheet
495	TCH	Threshold Crossing Height
496	TCL	Thrust Control Lever or Taxi Center Lights
497	TDW	Tower Display Workstation
498	TDZ	Runway Touchdown Zone Lighting
499	TDZE	Touch Down Zone Elevation
500	TERPS	US Standard for Terminal Instrument Procedures
501	TFDM	Terminal Flight Data Management
502	TFDPS	Tower Flight Data Processing System
503	TFM	Traffic Flow Management
504	TFR	Temporary Flight Restriction
505	TH	True Heading
506	TID	Touch Input Device
507	TIS	Traffic Information System
508	TLOF	Touchdown and Lift-off Area
509	TM	Traffic Management
510	TMA	Terminal Control Area
511	TOC	Top Of Climb
512	TOD	Top Of Descent
513	TODA	Take-off Distance Available
514	TODAH	Take-off Distance Available for Helicopter
515	TOP	Take-Off Power
516	TOR	Terms of Reference, or Tornado aircraft
517	TORA	Takeoff Run Available
518	TOWSIM	Tower Simulator
519	TRACON	Terminal Radar Approach Control
520	TRH	Thrust Reduction Height
521	TSO	Technical Standard Order
522	TSTC	Texas State Technical College
523	TT	True Track
524	TVOR	Terminal VOR
525	TWEB	Transcribed Weather Broadcast (USA for ATIS)
526	TWR	Control Tower or Thrust to Weight Ratio
527	TWY	Taxiway
528	TXC	Taxiway Centreline Lights
529	TXE	Taxiway Edge Lights
530	UA	Unmanned Aircraft
531	UAC	Upper Area Control Centre
532	UAM	Urban Air Mobility
533	UAS	Unmanned Aircraft Systems
534	UAT	Universal Access Transceiver
535	UAV	Unmanned Aerial Vehicle
536	UCAV	Unmanned Combat Aerial Vehicle
537	UDF	Ultra High Frequency Direction Finding
538	UEI	Units, Equipment, Installations
539	UFA	UFA, Inc., the world's premier developer of Air Traffic Control simulation systems
540	UHF	Ultra High Frequency (300MHz to 3 GHz)
541	UIR	Upper Flight Information Region
542	UKCAA	United Kingdom Civil Aviation Authority
543	UMASS	University of Massachusetts
544	URET	User Request Evaluation Tool
545	USAF	United States Air Force
546	UTA	Upper Traffic Area
547	V2	Takeoff speed. The speed at which the aircraft may safely be climbed with one engine inoperative
548	VAR	Magnetic Variation
549	VASI	Visual Approach Slope Indicator
550	VASIS	Visual Approach Slope Indicator System
551	VCS	Voice Communication System
552	VCCS	Voice Communication Control System
553	VCOA	Visual Climb Over Airport
554	VDF	Very High Frequency Direction Finding
555	VDGS	Visual Database Generation System
556	VDL-4	VHF digital link Mode 4 (see also STDMA)
557	VDU	Visual Display Unit
558	VFS	Vertical Flight Society
559	VFOW	Vertical Field of View
560	VFR	Visual Flight Rules
561	VHF	Very High Frequency (3 to 300MHz)
562	VLF	Very Low Frequency
563	VMC	Visual Meteorological Conditions
564	VOLMET	Meteorological Information for Aircraft in Flight
565	VOR	VHF Omni-directional Receiver
566	VORTAC	VOR -TACAN combination
567	VREF	1.3 times the stalling speed of the aircraft in the stated landing configuration and at the prevailing aircraft weight
568	VRS	Vortex Ring State
569	VS	Stall speed, defined as the minimum steady flight speed at which the airplane is controllable
570	VSBY	Visibility
571	VSP	Vertical Speed
572	VSTOL	Vertical Short Take-Off and Landing
573	VTC	Visual Terminal Chart
574	VTC	Virtual Training Centre
575	VTOL	Vertical Take-Off and Landing
576	VTOSL	Vertical Take-Off and Short Landing
577	VTS	Vehicle Tracking System
578	Vtoss	Take-off safety speed
579	Vy	Optimimum climbing speed
580	Vz	Rate-of-climb
581	WA	Wind Angle
582	WAAS	Wide Area Augmentation System
583	WAM	Wide Area Multilateration
584	WBS	Work Break-down Structure
585	WCA	Wind Correction Angle
586	WDI	Wind Direction Indicator
587	WGS	World Geodetic System
588	WIAS	Wetter Informations- und Anzeigesystem (German)
589	WP	Waypoint
590	WS	Work Station
591	WTC	Wake Turbulence Category
592	WTWS	Wake Turbulence Warning System
593	WX	Weather
594	WXR	Weather Radar Transceiver