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