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