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