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