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