PowerShell/data/dicts/aviation.csv

1	TERM	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	A-VDGS	Advanced Visual Docking Guidance System
15	A300	Airbus A300 twinjet
16	A310	Airbus A310 twinjet
17	A320	Airbus A320 family of twinjets
18	A330	Airbus A330 twinjet
19	A340	Airbus A340 quadjet
20	A350	Airbus A350 twinjet
21	A380	Airbus A380 quadjet
22	AAA	Airport Airspace Analysis
23	AAE	Above Aerodrome Elevation
24	AAF	Airway Facilities Service
25	AAF	Army Air Field
26	AAI	Arrival Aircraft Interval
27	AAI	Airports Authority of India
28	AAIB	Air Accidents Investigation Branch (UK)
29	AAIM	Aircraft Autonomous Integrity Monitoring
30	AAM	Advanced Air Mobility
31	AAMS	Aircraft Arrival Management System
32	AARTS	Army Aviation Radar Training System
33	AAO	Assumed Adverse Obstacle
34	AAS	Airport Advisory Service
35	AB	Air Base, Afterburner
36	ABI	Advanced Boundary Information
37	AC	Aircraft
38	ACAC	Arab Civil Aviation Conference
39	ACAM	Aircraft Continuing Airworthiness Monitoring
40	ACARS	Aircraft Communications Addressing and Reporting System
41	ACAS	Airborne Collision Avoidance System
42	ACC	Area Control Center
43	ACE	Airport airside Capacity Enhancement
44	ACI	Airports Council International, Area of Common Interest
45	ACP	Accept
46	AD	Air Defence
47	ADAC	Abu Dhabi Airports
48	ADEP	Aerodrome of Departure
49	ADES	Aerodrome of Destination
50	ADF	Automatic Direction Finding
51	ADI	Automatic De-Ice and Inhibitor
52	ADIRS	Air Data and Inertial Reference System
53	ADIRU	Air Data Inertial Reference Unit
54	ADIZ	Air Defense Identification Zone
55	ADL	Aeronautical Data Link
56	ADLY	Arrival Delay
57	ADP	Aerodrome dé Paris (Charles de Gaulle)
58	ADP	Automated Data Processing
59	ADS	Automated Distribution System, Automatic Dependent Surveillance, Aircraft Docking System
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	AGNIS	Azimuth Guidance for Nose-In Stand (docking system)
74	AH	Acceleration Height
75	ahdg	alter heading
76	AICS	Aircraft Inventory and Charter System
77	AID	Airport Information Desk
78	AIDS	Aircraft Integrated Data System
79	AIG	Airbus Industries Group
80	AILS	Automatic Instrument Landing System
81	AIM	Aeronautical Information Manual
82	AIP	Aeronautical Information Publication
83	AIPA	Aeronautical Information Production Application
84	AIRAC	Aeronautical Information Regulation And Control
85	AIRMET	Airmen's Meteorological Information
86	AIRNAV	Airports and Navigation Aids Database System
87	AIRNET	Airport Network Simulation Model
88	AIRPAC	Advisor for the Intelligent Resolution of Predicted Aircraft
89	ALO	Aviation Logistics Organization
90	ALP	Airport Layout Plan
91	ALPA	Airlines Pilots Association
92	ALS	Approach Lighting System
93	ALSF	Approach Lighting System With Sequenced Flashing Lights
94	ALSF1	ALS with Sequenced Flashers I
95	ALSF2	ALS with Sequenced Flashers II
96	ALSIP	Approach Lighting System Improvement Plan
97	ALTRV	Altitude Reservation
98	AM	Airfield Management
99	AMAN	Arrival Manager
100	AMASS	Airport Movement Area Safety System
101	AMCC	Air Route Traffic Control Center Maintenance Control Center
102	AMIC	Area Manager in Charge
103	AMIS	Aircraft Management Information System
104	AMOC	Alternative Methods of Compliance
105	AMOS	Automated Meteorological Observation Station
106	AMP	ARINC Message Processor (OR) Airport Master Plan
107	AMS	Acquisition Management System
108	AMT	Aviation Maintenance Technician
109	AMVER	Automated Mutual Assistance Vessel Rescue System
110	ANA	Administration of Air Navigation
111	ANC	Alternate Network Connectivity
112	ANCA	Airport Noise and Capacity Act
113	ANG	Air National Guard
114	ANGB	Air National Guard Base
115	ANMS	Automated Network Monitoring System
116	ANSL	Air Navigation Solutions Ltd. (UK)
117	ANSP	Air Navigation Service Provider
118	AOA	Angle of Attack, Air Operations Area, Airport Operating Area
119	AOB	Airfield Operations Board
120	AOC	Airline Operational Control Center
121	AOCC	Atlantic Operations Control Center
122	AODR	Authorizing Official Designated Representative
123	AOM	Airplane Operating Manual
124	AOPA	Aircraft Owners and Pilots Association
125	AoR	Area of Responsibility
126	AP	Acquisition Plan
127	APB	Acquisition Program Baselines
128	APIS	Aircraft Parking and Information System
129	APM	Approach Path Monitor
130	APP	Approach Area, Approach ATS Unit
131	APS	Airport Planning Standard
132	APTS	Automated Personnel Tracking System
133	APU	Auxiliary Power Unit
134	AQAFO	Aeronautical Quality Assurance Field Office
135	AR	Aerial Refueling
136	AR	Aspect Ratio
137	ARAC	Army Radar Approach Control (AAF)
138	ARFOR	Area Forecast
139	ARLNO	Airline Office
140	ARP	Airport Reference Point
141	ARTCC	Air Route Traffic Control Centre
142	ASACS	Air Surveillance and Control System
143	ASB	Airspace Block
144	ASDA	Accelerate Stop Distance Available
145	ASDE	Airport Surface Detection Equipment
146	ASDE-X	Airport Surface Detection Equipment, model X
147	ASOS	Automated Surface Observation System
148	ASR	Airport Surveillance Radar
149	ASTERIX	All Purpose Structured Eurocontrol Surveillance Information Exchange
150	ATA	Actual Time of Arrival
151	ATC	Air Traffic Control
152	ATCALS	Air Traffic Control and Landing Systems
153	ATCO	Air Traffic Control Officer
154	ATIS	Automatic Terminal Information Service
155	ATM	Air Traffic Management, Air Traffic Manager
156	ATO	Air Traffic Organization
157	ATPL	Airline Transport Pilot License
158	ATS	Air Traffic Services
159	ATZ	Air Traffic Zone
160	AURO	Autorotation (by helicopters)
161	AWACS	Airborne Warning And Control System
162	BC	Back Course
163	BAF	Belgian Air Force
164	BASH	Bird/Wildlife Aircraft Strike Hazard
165	BDOC	Base Defense Operations Center
166	BIRTAM	NOTAM on Bird Activity
167	BIT	Build-In Test
168	BITE	Build-In Test Equipment
169	BRNAV	Basic Area Navigation
170	BWB	Blended Wing Body
171	BWC	Bird Watch Condition
172	C2	Command and Control
173	C3	Communication, Command and Control
174	C4I	Communication, Command, Control, Computers and Intelligence
175	CAAC	Civil Aviation Administration of China
176	CAAS	Civil Aviation Authorization of Singapore
177	CAL	Computer Assisted Learning
178	CAMACA	Common Agreed Methodology for Airport airside Capacity Assessment
179	CANAC	Computer Assisted National Air Traffic Control Centre (Belgium)
180	CANSO	Civil Air Navigation Services Organization
181	CARMA	CATC Radar Simulator Allahabad
182	CAS	Calibrated Airspeed
183	CASE	Controlled Airspace Synthetic Environment (Simulator of Alenia Marconi)
184	CAT	Category of Aircraft, Clear Air Turbulence
185	CATC	Civil Air Traffic Control
186	CAVOK	Clouds And Visibility OK
187	C/S	Callsign
188	CBA	Cross-Border Area
189	CBT	Computer-based Training
190	CC	Commander
191	CCBC	Community College Baltimore County
192	CCIS	Closed Circuit Information System
193	CCTLR	Chief Controller
194	CDA	Continuous Descent Approach
195	CDI	Course Deviation Indicator
196	CDM	Collaborative Decision Making
197	CDR	Conditional Route
198	CDTI	Cockpit Display of Traffic Information
199	CDU	Cockpit Display Unit
200	CEATS	Central European Air Traffic Services
201	CESC	Chief Executive Standing Conference
202	CFIT	Controlled Flight Into Terrain
203	CFMU	Central Flow Management Unit
204	CFR	Code of Federal Regulations
205	COG	Center of Gravity
206	CON	Control
207	CGD	Combined Graphic Display
208	CISM	Critical Incident Stress Management
209	CLC	Course Line Computer
210	CLNC	Clearance
211	CMA	Controlled Movement Area
212	CMIC	Civil/Military Interface Standing Committee
213	CNS	Communication, Navigation, Surveillance
214	CODA	Central Office for Delay Analysis
215	ConOps	Concept of Operations
216	COPS	Changeover Point(s)
217	CORA	Conflict Resolution Advisory
218	COTS	Commercial Of-The-Shelf
219	CPA	Closest Point of Approach
220	CPDLC	Controller Pilot Data Link Communication
221	CPI	Crash Position Indicator
222	CPL	Commercial Pilot License
223	CRC	Control and Reporting Centre
224	CRDA	Converging Runway Display Aid
225	CREDOS	Crosswind Reduced Separations for Departure Operations
226	CTA	Control Area, Controlled Time of Arrival
227	CTAF	Common Traffic Advisory Frequency
228	CTOT	Calculated Take-Off Time
229	CTR	Control Zone or Controlled Traffic Region
230	CTZ	Control Zone
231	CV	Vice Commander
232	CVFR	Controlled Visual Flight Rule (flight)
233	CVSM	Conventional Vertical Separation Minimum
234	CW	Continous Wave
235	CW	Cold Weather
236	CWS	Collision Warning System
237	CWP	Controller Working Position
238	CWY	Clearway
239	DA	Density Altitude
240	DAS	DFS Aviation Services (DFS subcompany for services outside Germany)
241	DCIA	Dependent Converging Instrument Approach
242	DECIDE	Detect, Estimate, Choose, Identify, Do, and Evaluate
243	DEL	Delivery
244	DER	Departure End of Runway
245	DFL	Division Flight Level
246	DFS	Deutsche Flugsicherung (ATC in Germany)
247	DGAC	Direction Générale de l'Aviation Civile
248	DLA	Defense Logistics Agency
249	DP	Departure Procedure
250	DSNA	Direction des Services de la Navigation Aérienne
251	DTI	Direction Technique Innovation
252	DVA	Diverse Vector Area
253	DW	Downwind
254	EAS	Equivalent Airspeed
255	EAVA	Estonian Aviation Academy
256	ECAC	European Civil Aviation Conference
257	eCTOL	Electric Conventional Take-off and Landing
258	ECP	Entry Control Point
259	EFM	Gesellschaft für Enteisen und Flugzeugschleppen
260	EICAS	Engine Instrument Crew Alerting System
261	ELEV	Field Elevation
262	ELT	Emergency Locator Transmitter
263	EOL	Engine-off landing
264	ERPM	Engine Rotations per Minute
265	eSTOL	Electric Short Take-off and Landing
266	ETA	Estimated Time of Arrival, East Transition Area
267	ETL	Effective Translational Lift (for helicopters)
268	ETO	Estimated Time Over Significant Point
269	ETOPS	Extended-range Twin-engine Operational Performance Standards
270	ETVS	Electronic Terminal Voice Switch
271	eVTOL	Electric Vertical Take-off and Landing
272	FAA	U.S. Federal Aviation Administration
273	FAR	Fuel Air Ratio, Federal Aviation Regulations
274	FAS	Final Approach Segment
275	FAS	Final Approach Speed
276	FAST	Future Aviation Safety Team
277	FAT	Factory Acceptance Test (see also SAT and RAT)
278	FAT	Final Approach Track
279	FATO	Final Approach and Take-off Area
280	FAWP	Final Approach Waypoint
281	FAWS	Flight Advisory Weather Service
282	FBO	Fixed-Base Operator
283	FBW	Fly-by-Wire
284	FCA	Final Cruise Altitude
285	FCC	Federal Communications Commission (USA)
286	FCC	Flight Control Computer
287	FCI	Flight Command Indicator
288	FCL	Flight Crew Licensing
289	FCLP	Field Carrier Landing Practice
290	FCLT	Freeze Calculated Landing Time
291	FCLTP	Flight Crew Licensing and Training Panel (ICAO)
292	FCOM	Flight Crew Operating Manual
293	FCOM	Flight Crew Operations Manual
294	FCPC	Flight Control Primary Computer
295	FE	Field Elevation (highest point of an airport’s usable runways and is measured in height above mean sea level)
296	FIA	Flight Information Area
297	FIR	Flight Information Region
298	FIS	Federal Inspection Services
299	FL	Flight Level
300	FLIP	Flight Information Publication
301	FMG	Flughafen München GmbH
302	FMS	Flight Management System
303	FOD	Foreign Object Debris
304	FOV	Field of View
305	FWC	Flight Warning Computer
306	GA	General Aviation, Go Around (VFR)
307	GND	Ground
308	GP	Glide Path
309	GPS	Global Positioning System
310	GS	Ground Speed or Glideslope
311	HEMS	Helicopter Emergency Medical Services
312	HKIA	Hong Kong International Airport
313	HOGE	Hover Out of Ground Effect
314	HOTS	Higher-Order Thinking Skills
315	IAA	Israeli Airport Authority
316	IAF	Israeli Air Force
317	IAS	Indicated airspeed
318	IATA	International Air Transport Association, HQ in Montreal, Canada
319	ICA	Initial Climb Area
320	IFE	In-flight Emergency
321	IFR	Instrument Flight Rules
322	IG	Image Generator
323	IGE	In Ground Effect
324	IGLR	Integrated Ground Lighting and Radar
325	ILS	Instrument Landing System
326	ISA	International Standard Atmosphere
327	IMC	Instrument Meteorological Conditions
328	JATO	Jet Assisted Take Off
329	JTAC	Joint Terminal Attack Control
330	KAT	Kaufbeuren ATM Training (DFS subcompany)
331	KCAS	Calibrated AirSpeed in Knots
332	KIAS	Indicated Airspeed in Knots
333	KTAS	True AirSpeed in Knots
334	LAA	Lappland Aviation Academy
335	LAHSO	Land and Hold Short Operations
336	LDA	Landing Distance Available
337	LDAH	Landing Distance Available for Helicopter
338	LH	Lufthansa
339	LITAS	Low Intensity Two Colour Approach System
340	LL	Lower Limit
341	LMUK	Lockheed Martin UK
342	LOD	Level of Detail
343	LTA	Lower Traffic Area
344	LUAW	Line up and wait
345	LVNL	Luchtverkeersleiding Nederland (Air Traffic Control the Netherlands)
346	LVP	Low Visibility Procedures
347	LWINS	Lightweight Inertial Navigation System
348	MA	Missed Approach (IFR)
349	MATS	Malta Air Traffic Services
350	MEA	Minimum En-route Altitude
351	METAR	Meteorological Aerodrome Report
352	MCP	Maximum Continuous Power
353	MGTOW	Maximum Gross Take-off Weight
354	MLW	Maximum Landing Weight
355	MMR	Multi-Mode Receiver
356	MSA	Minimum Safe Altitude
357	MSL	Median Sea Level
358	MSTA	Minimum Safe Turning Altitude
359	MTOW	Maximum Take-Off Weight
360	NATCA	National Air Traffic Controllers Association
361	NATOPS	Naval Aviation Training and Operating Procedures Standardization
362	NATS	National Air Traffic Services (UK)
363	NAVAIDS	Navigational Aids
364	NCOIC	Non-Commissioned Officer in Charge
365	NIMA	National Imagery Mapping Agency
366	NLFS	Night Low Flying System
367	NM	Nautical Mile
368	NORDO	No Radio
369	NOTAM	Notice to Airmen or Notice to Air Missions
370	NUAIR	Northeast UAS Airspace Integration Research (a New York based nonprofit organization)
371	OCS	Obstacle Clearance Surfaces
372	OCTA	Outside Control Areas
373	OEI	One Engine Inoperative
374	ODP	Obstacle Departure Procedure
375	OGE	Out of Ground Effect
376	OFZ	Obstacle Free Zone
377	OJT	On the Job Training
378	OODA	Observation, Orientation, Decision, and Action
379	ORCAM	Originating Region Code Assignment Method
380	OSC	On Scene Commander
381	PA	Pressure Altitude
382	PADS	Parallax Aircraft Docking System
383	PAPA	Parallax Aircraft Parking Aid (docking system)
384	PAPI	Precision Approach Path Indicator
385	PAR	Precision Approach Radar
386	PCAS	Primary Crash Alarm System
387	PIC	Pilot in Command
388	PNF	Pilot Not Flying
389	POH	Pilot's Operating Handbook
390	PPL	Private Pilot's License
391	PMI	Preventative Maintenance Inspection
392	POFZ	Precision Obstacle Free Zone
393	PTAC	Position, Turn, Altitude, Clearance (also known as Approach Clearance)
394	PtF	Permit to Fly
395	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
396	QNE	pressure altitude at the landing runway threshold
397	QNH	atmospheric pressure adjusted to mean sea level
398	RADAR	Radio Detection And Ranging
399	RADNET	Radar Network
400	RAIM	Receiver Autonomous Integrity Monitoring (GPS)
401	RAPCON	Radar Approach Control
402	RAT	Reliability Acceptance Test (see also FAT and SAT)
403	RATO	Rocket Assisted Take Off
404	RAM	Royal Air Maroc
405	RAP	Recognised Air Picture
406	RASP	Recognised Air and Surveillance Picture
407	RB	Relative Bearing
408	RBI	Relative Bearing Indicator
409	RBAF	Royal Belgium Armed Forces
410	RCAF	Royal Canadian Air Force
411	RCC	Rescue Coordination Center
412	RCL	Runway Centre Line Lighting
413	RCR	Runway Condition Reading
414	RCS	Radar Cross Section
415	RESA	Runway End Safety Area
416	RET	Rapid Exit Taxiways
417	RF	Radio Frequency
418	RFFS	Rescue and Fire Fighting Services
419	RFM	Rotorcraft Flight Manual
420	RIMCAS	Runway Incursion Monitoring and Conflict Alert System
421	RJAF	Royal Jordanian Air Force
422	RJC	Reject
423	RPI	Runway Point of Intercept
424	ROFZ	Runway Obstacle Free Zone
425	RMI	Radio Magnetic Indicator
426	RNAV	Area Navigation
427	RNP	Required Navigation Performance
428	ROC	Rate Of Climb
429	ROC	Required Obstacle Clearance
430	RPS	Radar Position Symbol
431	RRPM	Rotor Rotations per Minute
432	RSA	Runway Safety Area
433	RSAF	Republic of Singapore Air Force, Royal Saudi Air Force
434	RSC	Runway Surface Condition
435	RSI	Remote Status Indicator
436	RSO	Range Safety Officer
437	RSRS	Reduced Same Runway Separation
438	RTAF	Royal Thai Air Force
439	RTCA	Radio Technical Commission for Aeronautics
440	RTF	Radio Telephony
441	RVR	Runway Visual Range
442	RVSM	Reduced Vertical Separation Minimum
443	RWR	Radar Warning Receiver
444	RWY	Runway
445	SADL	Situational Awareness Data Link
446	SAF	Sustainable Aviation Fuel
447	SAR	Search and Rescue, Synthetic Aperture Radar
448	SARPS	Standards and Recommended Practices (ICAO)
449	SAT	Site Acceptance Test (see also FAT and RAT)
450	SATCO	Senior Air Traffic Control Officer
451	SATCOM	Satellite Communication
452	SATNAV	Satellite Navigation
453	SATSE	State Air Traffic Services Enterprise
454	SCN	Secondary Crash Net
455	SDD	Situation Data Display
456	SEOL	Simulated engine-off landing
457	SELCAL	Selective Calling System
458	SES	Single European Sky
459	SESAME	Single European Sky ATM Master Plan
460	SESAR	Single European Sky ATM Research
461	SFC	Surface
462	SFL	Sequencing Flashing Light
463	SFO	Simulated Flameout Operation
464	SI	Selective Interrogation
465	SIAP	Standard Instrument Approach Procedure
466	SID	Standard Instrument Departure
467	SIF	Selective Identification Friend or Foe
468	SIGMET	Significant Meteorological (Information) Report
469	SILs	Sector Inbound Lists
470	SIM	Simulator
471	SKYGUIDE	Air Traffic Control of Switzerland
472	SL	Sea Level
473	SLB	Side lobe Blanking
474	SLC	Side lobe Cancellation
475	SLOC	Slovenia Control
476	SM	Statute Mile
477	SMR	Surface Movement Radar
478	SOF	Supervisor of Flying
479	SOW	Statement of Work
480	SRA	Surveillance Radar Approach
481	SRC	Safety Regulation Commission (EUROCONTROL)
482	SRU	Safety Regulation Unit (EUROCONTROL)
483	SSR	Secondary Surveillance Radar
484	STAR	Standard Arrival Route or Standard Terminal Arrival Route
485	STARS	Standard Terminal Automation Replacement System
486	STB	Stop Bar
487	STCA	Short Term Conflict Alert
488	STD	Synthetic Training Device
489	STDMA	Self-organising Time Division Multiple Access (known as VHF digital link - Mode 4)
490	STNA	Service Technique de la Navigation Aerienne
491	STO	Short Take-Off
492	STOVL	Short Take-Off and Vertical Landing
493	STOL	Short Take-Off and Landing
494	STRATFOR	Eurocontrol Statistics and Forecasts Service
495	SUA	Special Use Airspace
496	SV	Supervisor
497	SVFR	Special Visual Flight Rules
498	SWT	Switch
499	SWY	Stopway
500	SYSCO	System Coordination – Data Exchange and Coordination
501	TA	Terminal Airspace
502	TAA	Terminal Arrival Area
503	TAAM	Total Airspace and Airport Modeller
504	TACAN	Tactical Air Navigation (System)
505	TACS	Theater Air Control System
506	TACTICOS	Tactical Information and Command System
507	TAF	Terminal Aerodrome/Area Forecast
508	TAIS	Tactical Airspace Integration System (US Army)
509	TAIS	Tactical Air Intelligence System
510	TAP	Target Acquisition Protocol
511	TARMAC	Taxi and Ramp Management and Control
512	TAS	Terminal Airspace System
513	TAS	True Air Speed
514	TAWS	Terrain Avoidance and Warning System
515	TCAS	Traffic alert and Collision Avoidance System
516	TCDS	Type Certificate Data Sheet
517	TCH	Threshold Crossing Height
518	TCL	Thrust Control Lever or Taxi Center Lights
519	TDW	Tower Display Workstation
520	TDZ	Runway Touchdown Zone Lighting
521	TDZE	Touch Down Zone Elevation
522	TERPS	US Standard for Terminal Instrument Procedures
523	TFDM	Terminal Flight Data Management
524	TFDPS	Tower Flight Data Processing System
525	TFM	Traffic Flow Management
526	TFR	Temporary Flight Restriction
527	TH	True Heading
528	TID	Touch Input Device
529	TIS	Traffic Information System
530	TLOF	Touchdown and Lift-off Area
531	TM	Traffic Management
532	TMA	Terminal Control Area
533	TOC	Top Of Climb
534	TOD	Top Of Descent
535	TODA	Take-off Distance Available
536	TODAH	Take-off Distance Available for Helicopter
537	TOP	Take-Off Power
538	TOR	Terms of Reference, or Tornado aircraft
539	TORA	Takeoff Run Available
540	TOWSIM	Tower Simulator
541	TRA	Temporary Reserved Area
542	TRACON	Terminal Radar Approach Control
543	TRH	Thrust Reduction Height
544	TSA	Temporary Segregated Area
545	TSO	Technical Standard Order
546	TSTC	Texas State Technical College
547	TT	True Track
548	TVOR	Terminal VOR
549	TWEB	Transcribed Weather Broadcast (USA for ATIS)
550	TWR	Aerodrome Control Tower or Thrust to Weight Ratio
551	TWY	Taxiway
552	TXC	Taxiway Centreline Lights
553	TXE	Taxiway Edge Lights
554	UA	Unmanned Aircraft
555	UAC	Upper Area Control Centre
556	UAM	Urban Air Mobility
557	UAS	Unmanned Aircraft Systems
558	UAT	Universal Access Transceiver
559	UAV	Unmanned Aerial Vehicle
560	UCAV	Unmanned Combat Aerial Vehicle
561	UDF	Ultra High Frequency Direction Finding
562	UEI	Units, Equipment, Installations
563	UFA	UFA, Inc., the world's premier developer of Air Traffic Control simulation systems
564	UHF	Ultra High Frequency (300MHz to 3 GHz)
565	UIR	Upper Flight Information Region
566	UKCAA	United Kingdom Civil Aviation Authority
567	UMASS	University of Massachusetts
568	UNL	Unlimited
569	URET	User Request Evaluation Tool
570	USAF	United States Air Force
571	UTA	Upper Traffic Area
572	V2	Takeoff speed. The speed at which the aircraft may safely be climbed with one engine inoperative
573	VAR	Magnetic Variation
574	VASI	Visual Approach Slope Indicator
575	VASIS	Visual Approach Slope Indicator System
576	VCS	Voice Communication System
577	VCCS	Voice Communication Control System
578	VCOA	Visual Climb Over Airport
579	VDF	Very High Frequency Direction Finding
580	VDGS	Visual Docking Guidance System, Visual Database Generation System
581	VDL-4	VHF digital link Mode 4 (see also STDMA)
582	VDU	Visual Display Unit
583	VFS	Vertical Flight Society
584	VFOW	Vertical Field of View
585	VFR	Visual Flight Rules
586	VHF	Very High Frequency (3 to 300MHz)
587	VLF	Very Low Frequency
588	VMC	Visual Meteorological Conditions
589	VOLMET	Meteorological Information for Aircraft in Flight
590	VOR	VHF Omni-directional Receiver
591	VORTAC	VOR -TACAN combination
592	VREF	1.3 times the stalling speed of the aircraft in the stated landing configuration and at the prevailing aircraft weight
593	VRS	Vortex Ring State
594	VS	Stall speed, defined as the minimum steady flight speed at which the airplane is controllable
595	VSBY	Visibility
596	VSP	Vertical Speed
597	VSTOL	Vertical Short Take-Off and Landing
598	VTC	Visual Terminal Chart
599	VTC	Virtual Training Centre
600	VTOL	Vertical Take-Off and Landing
601	VTOSL	Vertical Take-Off and Short Landing
602	VTS	Vehicle Tracking System
603	Vtoss	Take-off safety speed
604	Vy	Optimimum climbing speed
605	Vz	Rate-of-climb
606	WA	Wind Angle
607	WAAS	Wide Area Augmentation System
608	WAM	Wide Area Multilateration
609	WBS	Work Break-down Structure
610	WCA	Wind Correction Angle
611	WDI	Wind Direction Indicator
612	WGS	World Geodetic System
613	WIAS	Wetter Informations- und Anzeigesystem (German)
614	WP	Waypoint
615	WS	Work Station
616	WTC	Wake Turbulence Category
617	WTWS	Wake Turbulence Warning System
618	WX	Weather
619	WXR	Weather Radar Transceiver
620	ZELL	Zero Length Launch