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