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	FAA	U.S. Federal Aviation Administration
257	FAR	Fuel Air Ratio
258	FAS	Final Approach Segment
259	FAS	Final Approach Speed
260	FAST	Future Aviation Safety Team
261	FAT	Factory Acceptance Test (see also SAT and RAT)
262	FAT	Final Approach Track
263	FATO	Final Approach and Take-off Area
264	FAWP	Final Approach Waypoint
265	FAWS	Flight Advisory Weather Service
266	FBO	Fixed-Base Operator
267	FBW	Fly-by-Wire
268	FCA	Final Cruise Altitude
269	FCC	Federal Communications Commission (USA)
270	FCC	Flight Control Computer
271	FCI	Flight Command Indicator
272	FCL	Flight Crew Licensing
273	FCLP	Field Carrier Landing Practice
274	FCLT	Freeze Calculated Landing Time
275	FCLTP	Flight Crew Licensing and Training Panel (ICAO)
276	FCOM	Flight Crew Operating Manual
277	FCOM	Flight Crew Operations Manual
278	FCPC	Flight Control Primary Computer
279	FE	Field Elevation (highest point of an airport’s usable runways and is measured in height above mean sea level)
280	FIA	Flight Information Area
281	FIR	Flight Information Region
282	FL	Flight Level
283	FLIP	Flight Information Publication
284	FMG	Flughafen München GmbH
285	FMS	Flight Management System
286	FOD	Foreign Object Debris
287	FOV	Field of View
288	FWC	Flight Warning Computer
289	GA	General Aviation, Go Around (VFR)
290	GND	Ground
291	GP	Glide Path
292	GPS	Global Positioning System
293	GS	Ground Speed or Glideslope
294	HEMS	Helicopter Emergency Medical Services
295	HKIA	Hong Kong International Airport
296	HOTS	Higher-Order Thinking Skills
297	IAA	Israeli Airport Authority
298	IAF	Israeli Air Force
299	IAS	Indicated airspeed
300	IATA	International Air Transport Association, HQ in Montreal, Canada
301	ICA	Initial Climb Area
302	IFE	In-flight Emergency
303	IFR	Instrument Flight Rules
304	IG	Image Generator
305	IGE	In Ground Effect
306	IGLR	Integrated Ground Lighting and Radar
307	ILS	Instrument Landing System
308	ISA	International Standard Atmosphere
309	IMC	Instrument Meteorological Conditions
310	KAT	Kaufbeuren ATM Training (DFS subcompany)
311	KCAS	Calibrated AirSpeed in Knots
312	KIAS	Indicated Airspeed in Knots
313	KTAS	True AirSpeed in Knots
314	LAA	Lappland Aviation Academy
315	LDA	Landing Distance Available
316	LDAH	Landing Distance Available for Helicopter
317	LITAS	Low Intensity Two Colour Approach System
318	LL	Lower Limit
319	LMUK	Lockheed Martin UK
320	LOD	Level of Detail
321	LTA	Lower Traffic Area
322	LUAW	Line up and wait
323	LVNL	Luchtverkeersleiding Nederland (Air Traffic Control the Netherlands)
324	LVP	Low Visibility Procedures
325	LWINS	Lightweight Inertial Navigation System
326	MA	Missed Approach (IFR)
327	MATS	Malta Air Traffic Services
328	MEA	Minimum En-route Altitude
329	METAR	Meteorological Aerodrome Report
330	MCP	Maximum Continuous Power
331	MLW	Maximum Landing Weight
332	MMR	Multi-Mode Receiver
333	MSA	Minimum Safe Altitude
334	MSL	Median Sea Level
335	MSTA	Minimum Safe Turning Altitude
336	MTOW	Maximum Take-Off Weight
337	NATCA	National Air Traffic Controllers Association
338	NATOPS	Naval Aviation Training and Operating Procedures Standardization
339	NATS	National Air Traffic Services (UK)
340	NAVAIDS	Navigational Aids
341	NCOIC	Non-Commissioned Officer in Charge
342	NIMA	National Imagery Mapping Agency
343	NLFS	Night Low Flying System
344	NORDO	No Radio
345	NOTAM	Notice to Airmen or Notice to Air Missions
346	NUAIR	Northeast UAS Airspace Integration Research (a New York based nonprofit organization)
347	OCS	Obstacle Clearance Surfaces
348	OCTA	Outside Control Areas
349	OEI	One Engine Inoperative
350	ODP	Obstacle Departure Procedure
351	OGE	Out of Ground Effect
352	OFZ	Obstacle Free Zone
353	OJT	On the Job Training
354	OODA	Observation, Orientation, Decision, and Action
355	PA	Pressure Altitude
356	PAPI	Precision Approach Path Indicator
357	PAR	Precision Approach Radar
358	PCAS	Primary Crash Alarm System
359	PIC	Pilot in Command
360	PNF	Pilot Not Flying
361	POH	Pilot's Operating Handbook
362	PPL	Private Pilot's License
363	PMI	Preventative Maintenance Inspection
364	POFZ	Precision Obstacle Free Zone
365	PTAC	Position, Turn, Altitude, Clearance (also known as Approach Clearance)
366	PtF	Permit to Fly
367	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
368	QNE	pressure altitude at the landing runway threshold
369	QNH	atmospheric pressure adjusted to mean sea level
370	RADAR	Radio Detection And Ranging
371	RADNET	Radar Network
372	RAIM	Receiver Autonomous Integrity Monitoring (GPS)
373	RAPCON	Radar Approach Control
374	RAT	Reliability Acceptance Test (see also FAT and SAT)
375	RAM	Radar Absorbent Material
376	RAP	Recognised Air Picture
377	RASP	Recognised Air and Surveillance Picture
378	RB	Relative Bearing
379	RBI	Relative Bearing Indicator
380	RBAF	Royal Belgium Armed Forces
381	RCAF	Royal Canadian Air Force
382	RCC	Rescue Co-ordination Centre
383	RCL	Runway Centre Line Lighting
384	RCR	Runway Condition Reading
385	RCS	Radar Cross Section
386	RESA	Runway End Safety Area
387	RET	Rapid Exit Taxiways
388	RF	Radio Frequency
389	RFFS	Rescue and Fire Fighting Services
390	RFM	Rotorcraft Flight Manual
391	RIMCAS	Runway Incursion Monitoring and Conflict Alert System
392	RJAF	Royal Jordanian Air Force
393	RJC	Reject
394	RPI	Runway Point of Intercept
395	RPM	Rotations per Minute
396	ROFZ	Runway Obstacle Free Zone
397	RMI	Radio Magnetic Indicator
398	RNAV	Area Navigation
399	RNP	Required Navigation Performance
400	ROC	Rate Of Climb
401	ROC	Required Obstacle Clearance
402	RPM	Revolutions Per Minute
403	RPS	Radar Position Symbol
404	RRPM	Rotor Rotations per Minute
405	RSA	Runway Safety Area
406	RSC	Runway Surface Condition
407	RSI	Remote Status Indicato
408	RSRS	Reduced Same Runway Separation
409	RTCA	Radio Technical Commission for Aeronautics
410	RVR	Runway Visual Range
411	RVSM	Reduced Vertical Separation Minimum
412	RWR	Radar Warning Receiver
413	RWY	Runway
414	SADL	Situational Awareness Data Link
415	SAF	Sustainable Aviation Fuel
416	SAR	Search and Rescue, Synthetic Aperture Radar
417	SARPS	Standards and Recommended Practices (ICAO)
418	SAT	Site Acceptance Test (see also FAT and RAT)
419	SATCO	Senior Air Traffic Control Officer
420	SATCOM	Satellite Communication
421	SATNAV	Satellite Navigation
422	SATSE	State Air Traffic Services Enterprise
423	SCN	Secondary Crash Net
424	SDD	Situation Data Display
425	SEOL	Simulated engine-off landing
426	SELCAL	Selective Calling System
427	SES	Single European Sky
428	SESAME	Single European Sky ATM Master Plan
429	SESAR	Single European Sky ATM Research
430	SFL	Sequencing Flashing Light
431	SFO	Simulated Flameout Operation
432	SI	Selective Interrogation
433	SIAP	Standard Instrument Approach Procedure
434	SID	Standard Instrument Departure
435	SIF	Selective Identification Friend or Foe
436	SIGMET	Significant Meteorological (Information) Report
437	SILs	Sector Inbound Lists
438	SIM	Simulator
439	SKYGUIDE	Air Traffic Control of Switzerland
440	SL	Sea Level
441	SLB	Side lobe Blanking
442	SLC	Side lobe Cancellation
443	SLOC	Slovenia Control
444	SM	Statute Mile
445	SMR	Surface Movement Radar
446	SOF	Supervisor of Flying
447	SOW	Statement of Work
448	SRC	Safety Regulation Commission (EUROCONTROL)
449	SRU	Safety Regulation Unit (EUROCONTROL)
450	SSR	Secondary Surveillance Radar
451	STAR	Standard Arrival Route or Standard Terminal Arrival Route
452	STARS	Standard Terminal Automation Replacement System
453	STB	Stop Bar
454	STCA	Short Term Conflict Alert
455	STD	Synthetic Training Device
456	STDMA	Self-organising Time Division Multiple Access (known as VHF digital link - Mode 4)
457	STNA	Service Technique de la Navigation Aerienne
458	STO	Short Take-Off
459	STOVL	Short Take-Off and Vertical Landing
460	STOL	Short Take-Off and Landing
461	STRATFOR	Eurocontrol Statistics and Forecasts Service
462	SUA	Special Use Airspace
463	SV	Supervisor
464	SVFR	Special Visual Flight Rules
465	SWT	Switch
466	SWY	Stopway
467	SYSCO	System Coordination – Data Exchange and Coordination
468	TA	Terminal Airspace
469	TAA	Terminal Arrival Area
470	TAAM	Total Airspace and Airport Modeller
471	TACAN	Tactical Air Navigation (System)
472	TACS	Theater Air Control System
473	TACTICOS	Tactical Information and Command System
474	TAF	Terminal Aerodrome/Area Forecast
475	TAIS	Tactical Airspace Integration System (US Army)
476	TAIS	Tactical Air Intelligence System
477	TAP	Target Acquisition Protocol
478	TARMAC	Taxi and Ramp Management and Control
479	TAS	Terminal Airspace System
480	TAS	True Air Speed
481	TAWS	Terrain Avoidance and Warning System
482	TCAS	Traffic alert and Collision Avoidance System
483	TCDS	Type Certificate Data Sheet
484	TCH	Threshold Crossing Height
485	TCL	Thrust Control Lever or Taxi Center Lights
486	TDW	Tower Display Workstation
487	TDZ	Runway Touchdown Zone Lighting
488	TDZE	Touch Down Zone Elevation
489	TERPS	US Standard for Terminal Instrument Procedures
490	TFDM	Terminal Flight Data Management
491	TFDPS	Tower Flight Data Processing System
492	TFM	Traffic Flow Management
493	TFR	Temporary Flight Restriction
494	TH	True Heading
495	TID	Touch Input Device
496	TIS	Traffic Information System
497	TLOF	Touchdown and Lift-off Area
498	TM	Traffic Management
499	TMA	Terminal Control Area
500	TOC	Top Of Climb
501	TOD	Top Of Descent
502	TODA	Take-off Distance Available
503	TODAH	Take-off Distance Available for Helicopter
504	TOP	Take-Off Power
505	TOR	Terms of Reference, or Tornado aircraft
506	TORA	Takeoff Run Available
507	TOWSIM	Tower Simulator
508	TRACON	Terminal Radar Approach Control
509	TRH	Thrust Reduction Height
510	TSO	Technical Standard Order
511	TSTC	Texas State Technical College
512	TT	True Track
513	TVOR	Terminal VOR
514	TWEB	Transcribed Weather Broadcast (USA for ATIS)
515	TWR	Control Tower or Thrust to Weight Ratio
516	TWY	Taxiway
517	TXC	Taxiway Centreline Lights
518	TXE	Taxiway Edge Lights
519	UA	Unmanned Aircraft
520	UAC	Upper Area Control Centre
521	UAS	Unmanned Aircraft Systems
522	UAT	Universal Access Transceiver
523	UAV	Unmanned Aerial Vehicle
524	UCAV	Unmanned Combat Aerial Vehicle
525	UDF	Ultra High Frequency Direction Finding
526	UEI	Units, Equipment, Installations
527	UFA	UFA, Inc., the world's premier developer of Air Traffic Control simulation systems
528	UHF	Ultra High Frequency (300MHz to 3 GHz)
529	UIR	Upper Flight Information Region
530	UKCAA	United Kingdom Civil Aviation Authority
531	UMASS	University of Massachusetts
532	URET	User Request Evaluation Tool
533	USAF	US Air Force
534	UTA	Upper Traffic Area
535	V2	Takeoff speed. The speed at which the aircraft may safely be climbed with one engine inoperative
536	VAR	Magnetic Variation
537	VASI	Visual Approach Slope Indicator
538	VASIS	Visual Approach Slope Indicator System
539	VCS	Voice Communication System
540	VCCS	Voice Communication Control System
541	VCOA	Visual Climb Over Airport
542	VDF	Very High Frequency Direction Finding
543	VDGS	Visual Database Generation System
544	VDL-4	VHF digital link Mode 4 (see also STDMA)
545	VDU	Visual Display Unit
546	VFOW	Vertical Field of View
547	VFR	Visual Flight Rules
548	VHF	Very High Frequency (3 to 300MHz)
549	VLF	Very Low Frequency
550	VMC	Visual Meteorological Conditions
551	VOLMET	Meteorological Information for Aircraft in Flight
552	VOR	VHF Omni-directional Receiver
553	VORTAC	VOR -TACAN combination
554	VREF	1.3 times the stalling speed of the aircraft in the stated landing configuration and at the prevailing aircraft weight
555	VRS	Vortex Ring State
556	VS	Stall speed, defined as the minimum steady flight speed at which the airplane is controllable
557	VSBY	Visibility
558	VSP	Vertical Speed
559	VSTOL	Vertical Short Take-Off and Landing
560	VTC	Visual Terminal Chart
561	VTC	Virtual Training Centre
562	VTOL	Vertical Take-Off and Landing
563	VTOSL	Vertical Take-Off and Short Landing
564	VTS	Vehicle Tracking System
565	Vtoss	Take-off safety speed
566	Vy	Optimimum climbing speed
567	Vz	Rate-of-climb
568	WA	Wind Angle
569	WAAS	Wide Area Augmentation System
570	WAM	Wide Area Multilateration
571	WBS	Work Break-down Structure
572	WCA	Wind Correction Angle
573	WDI	Wind Direction Indicator
574	WGS	World Geodetic System
575	WIAS	Wetter Informations- und Anzeigesystem (German)
576	WP	Waypoint
577	WS	Work Station
578	WTC	Wake Turbulence Category
579	WTWS	Wake Turbulence Warning System
580	WX	Weather
581	WXR	Weather Radar Transceiver