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