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