AVIATION AND TRANSPORTATION ACRONYM GLOSSARY

 

3DAAP	Three-dimensional airspace analysis program
3PL	Third Party Logistics
3PLP	Third Party Logistics Providers
4PL	Fourth Party Logistics
A
AAAE	American Association of Airport Executives
AC	Advisory Circular
ACAS	Automated card access system
ACC (1)	Area Control Centre (air)
ACC (2)	Adaptive Cruise Control (road)
ACCC	Airport command control center
ACFT	Aircraft
ACI	Airports Council International
ACM	Airport certification manual
ACO	Aircraft certification office
ACTS	Advanced Communication Technologies and Services
AD	Airport design
ADA	Americans with Disabilities Act
ADAS (1)	Action Data System. System in use in some European Coast Guards
ADAS (2)	Advanced driver assistance system (road)
ADF	Automatic direction finder
ADG	Airplane design group
ADGS	Aircraft docking guidance system
ADO	Airport District Office (FAA)
ADRT	Alternate departure route
ADS-B	Automatic Dependent Surveillance-Broadcast (air)
AEP	Airport emergency plan
AF	Airway Facilities (FAA)
AFIS	Automated flight inspection system
AFS	Airways facilities sector
AFSFO	Airways facilities sector field office
AFSO	Airways facilities sector office
AFSS	Automated flight service station
AGL	Above ground level
AGTS	Automated ground transportation system
AIC	Airport information system
AILS	Automatic instrument landing system
AIMS	Airport integrated mapping system
AIP	Airport Improvement Program
AIS (1)	Aeronautical Information Services (air)
AIS (2)	Automatic Identification System (waterborne, road)
AIS	Automated information security
ALP	Airport layout plan
ALS	Approach lighting system
ALSF-1	Standard 2400’ high-intensity approachlighting system with sequenced flashers (Category Iconfiguration)
ALSF-2	Standard 2400’ high-intensity approachlighting system with sequenced flashers (Category IIconfiguration)
ALT	Altitude
AMC	Airspace Management Cell (air)
AMF	Air mail facility
AMGR	Airport manager
ANG	Army National Guard
ANT	Antenna
AOA	At or above; aircraft operational area
AOB	At or below
AOC	Airline Operations Centre (air)
AOR	Airport operational readiness
AP	Airports Division (FAA)
APL	Airport lights
APPM	Accident prevention program manager
APS	Advanced Planning and Scheduling: a function within -> SCM
ARAC	Army radar approach control facility
ARC	Archive System of CFMU (air)
ARC	Airport reference code
ARCC	Air Rescue Co-ordination Centre (air)
ARFF	Aircraft rescue and firefighting
ARP	Airport reference point
ARPA	Automatic Radar Plotting Aid
ARPT	Airport
ARSA	Airport radar service area
ARSC	Air Rescue Sub Centre, respons. for aeronautical accidents and incidents (air)
ARSR	Air route surveillance radar
ARTCC	Air Route Traffic Control Center
ARTEMIS	Project management software
ARTS	Automated radar terminal system
ASAP	As soon as possible
ASDA	Accelerate-stop distance available
ASDE	Airport surface detection equipment
ASL	Above sea level
ASM	Airspace Management (air)
ASOS	Automatic surface observing system
ASP	Airport security plan; airspace
ASPH	Asphalt
ASR	Airport surveillance radar
ASV	Annual service volume
AT	Air Traffic Division (FAA)
ATA (1)	Actual Time of Arrival
ATA (2)	Air Transport Association
ATA	Air Transport Association of America
ATBA	Area to be avoided (waterborne)
ATC	Air Traffic Control (air)
ATC	Air traffic control
ATCF	Air traffic control facility
ATCT	Airport Traffic Control Tower
ATD	Actual Time of Departure
ATFM	Air Traffic Flow Management (air)
ATIS	Airport traffic information service
ATM	Air Traffic Management (air)
ATM	Air traffic manager
ATO	Airline ticket office
ATOG	Allowable takeoff gross weight
ATS	Air Traffic Services (air)
AVGAS	Aviation gasoline
AVI	Automatic vehicle identification
AVMS	Automatic Vessel Monitoring System
AVN	Aviation standards national field office
AWOS	Automated weather observing system
AZ	Azimuth
B
BCN	Beacon
BIDS	Baggage information display system
BMS	Basic meteorological services
BRITE	Bright radar indicator tower equipment
BRL	Building restriction line
BUEC	Backup emergency communications
BUL	Bulletin
C
C	Circling (approach and landing charts)
CAA	Civil Aviation Authorities (air)
CAACE	Comité des Associations d'Armateurs de la Communauté Européenne
CAD	Computer aided dispatch
CADD	Computed aided design and drafting
CAFM	Computer aided facility management
CAP	Civil Air Patrol
CAS	Collision avoidance system; calibrated airspeed
CASFO	Civil aviation security field office
CAT I, II, III	Category of ILS approach
CBI	Computer based instructions
CCR	Commission Centrale du Rhin (waterborne). Active in creating standards for waterborne traffic and transport
CCTV	Closed-Circuit Television
CCTV	Closed-circuit television
CDM	Collaborative Decision Making (air)
CEC	Certificate of Competence
CEN	CEN - The European Committee for Standardization
CENELEC	European Committee for Electrotechnical Standardization
CEPT	European Conference of Postal and Telecommunications Adminstrations
CES	Coast Earth Station. An Inmarsat communication station on the earth surface
CFM	Confirm
CFMU	Central Flow Management Unit, part of -> EUROCONTROL (air)
CFW	Center field wind
CHIRP	Confidential Hazardous Incident Reporting Programme
CIFP	Cancel IFR flight plan
CIFR	Cancel IFR clearance previously given
CIP	Capital improvement program
CLF	Cableless Linking of intersections for co-ordinated traffic flow (road)
CMMS	Computerized maintenance management system
CNS	Communications, Navigation and Surveillance (air)
CNTRLN	Centerline
COLREGS	Convention on the International Regulations for Preventing Collisions at Sea
CPA	Closest Point of Approach (waterborne)
CPTY	Capacity
CRS (1)	Coast Radio Station (waterborne)
CRS (2)	Computer Reservation System
CSL-DB	Common Source Logistics Database (inland waterways)
CSO	Company Security Officer
CSS	Coastal Surface Search. A vessel co-ordinating surface -> SAR (waterborne)
CTGY	Category
CTLR	Controller
CTLZ	Control zone
C-TPAT	Customs - Trade Partnership Against Terrorism (US Customs)
CTS	Cordless Telephone System
CUTE	Common use terminal equipment
CWA	Coast Watching Unit
CWY	Clearway
D
DA	Departure approved
DAB	Digital Audio Broadcast (road) used to transmit traffic information to vehicles
DB	Decibel
DBA	A-weighted decibels; database administrator
DBE	Disadvantaged business enterprise
DBMS	Database Management System
DBMS	Database management system
D-BRITE	Digital brite radar indicator
DCA	Digital Channel Allocation
DCPA	Distance at Closest Point of Approach
DCRZ	Descend to and cruise
DCS	Digital Channel Selection
DD	Deep draught
DDFTS	Demand-Driven Freight Transport Systems
DECT	Digital Enhanced Cordless Telephone
DEMARC	Demarcation point
DETRESFA	Distress Phase. Vessel / person in danger, requires immediate assistance
DF	Direction Finding
DGNSS	Differential Global Navigation Satellite System
DGPS	Differential Global Positioning System
DH	Decision height
DLC	Delayed clearance
DME	Distance measuring equipment
DMEG	DME collocated with glide slope
DMEL	DME collocated with localizer
DMEV	DME collocated with VOR
DMS (1)	Dynamic Message Signs cf. -> VMS (road) DRIP
DMS (2)	Destination Management System
DOT	Department of Transportation
DRIP	Dynamic Route Information Panels (road) -> VMS -> DMS
DRIS	Dynamic Route Information System (road) -> VMS -> DMS
DRIVE	Dedicated Road Infrastructure for Vehicle safety in Europe (road)
DSC	Digital Selective Calling
DSRC	Dedicated Short Range Communications, esp. for tolling systems (road)
DSRR	Digital Short Range Radio
DTF	Digital Terrain File
E
EA	Environmental assessment
EAD	European Aeronautical Database (air)
EAN	European Article Numbering, developed by EAN International, European counterpart of -> UCC
EARTS	En route automated radar tracking system
EAS	Equivalent airspeed; essential air service
EAT	Expected approach time
EATCHIP	European Air Traffic Control Harmonisation and Integration Programme (air)
ECAC	European Civil Aviation Conference (air)
ECDIS	Electronic Chart Displaying Information Systems (waterborne)
EDGE	Enhanced Datarates for Global Evolution
EDI	Electronic Data Interchange
EDI	Electronic data interchange
EDIFACT	Guidelines for the definition of electronic messages regarding EDI and scenarios of transactions between two parties
EDMS	Electronic document/drawing management system
EDS	Environmental Data Service
EEM	External Error Mode
EFAS	En Route Flight Advisory Service
EFC	Electronic Fee Collection (road)
EFF	Effective
EFR	Expect further routing
EIA	European Intermodal Association
EIS	Environmental impact study
EL	Elevation
ELAT/ELONG	Estimated latitude/longitude
EMC	Electro-magnetic compatibility
EMI	Electro-magnetic interference
EMLPP	Enhanced MultiLevel Precedence and Preemption - GSM-R service for prioritised calls (e.g. in case of emergency)
EMRS	European Maritime Reporting System (waterborne)
EMS	Environmental Management System
ENC	Electronic Navigation Chart (waterborne)
ENRT	En route
ENV	Environmental Database of -> CFMU (air)
EP	Enplaned passenger
EPA	Environmental Protection Agency
EPC	Electronic Product Code to be used on -> RFID tags
ERAD	En route radar (broad band)
ERC	European Radio-communication Committee. This is a part of ->CEPT
ERP	Enterprise Resource Planning
ERSP	En route spacing program
ERTMS	European Rail Traffic Management System (rail)
ESN	European Short Sea Network
ESU	Environmental service unit
ESV	Extended air service volume
ETA	Expected Time of Arrival
ETA/D	Estimated time of arrival/departure
ETCS	European Train Control System (rail)
ETD	Expected Time of Departure
ETG	Enhanced target indicator
ETSI	European Telecommunications Standards Institute
ETV	Emergency Towing Vessel (waterborne)
EVI	Electronic Vehicle Identification (road)
EXEC-1:	President on board civil aircraft
F
FA	Final approach
FAA	Federal Aviation Administration
FAR	Fatal Accident Rate
FAR	Federal Aviation Regulations
FARADEX	Functional Architecture Reference for ATM systems and Data Exchange (air)
FBI	Federal Bureau of Investigation
FBO	Fixed-base operator
FCC	Federal Communications Commission
FCD	Floating Car Data
FCST	Forecast
FDAD	Full digital alphanumeric display
FDIO	Flight data input/output
FEXHA	Fuel supply exhausted
FGDC	Federal Geospatial Data Committee
FIDS	Flight information display system
FIFO	Flight inspection field office
FIS	Fairway Information System (waterborne)
FIS	Federal Inspection Station(customs/immigration)
FL	Flight level
FLP	Facility layout plan
FMS	Facility management standard/system
FP	Flight plan
FPL	Flight Plan (air)
FRH	Fly runway heading
FS	Flight standards (FAA)
FSA	Formal Safety Assessment
FSDO	Flight Standards District Office
FSNFO	Flight Standards National Field Office
FSO	Fuel services operator
FSS	Flight service station
FTMS (1)	Freight Transport Management System
FTMS (2)	Freight Transport Monitoring System
FY	Fiscal year
G
GA	General aviation
GADO	General Aviation District Office
GB	Gigabytes
GC	Ground control
GEO	Geosynchronous Earth Orbit
GIS	Geographical Information System
GLONASS	Global Navigation Satellite System. A Soviet space-based navigation system similar to GPS
GMDSS	Global Maritime Distress and Safety System (waterborne)
GMS	Gate management system
GMT	Greenwich Mean Time
GNSS	Global Navigation Satellite System (air)
GOES	Geostationary orbiting environmental satellite
GOVT	Government
GP	Glide path
GPRS	General Packet Radio Service
GPS	Global Positioning System
GPS	Global positioning system
GS	Glide slope
GSM	Global System for Mobile communications
GSM-R	Global System for Mobile communications - Railway
GT	Gross Tonnage
GUI	Graphical User Interface
GV	Ground visibility
GVGI	Generic visual slope indicator
GWT	Gross weight
H
HAA	Height above airport
HAPI	Holding as previously instructed
HAT	Height above touchdown
HAZMAT	Hazardous Material
HAZOP	Hazard and Operability Study
HCC	Harmonised Customs Code
HDTA	High density traffic airport
HEL	Helicopter
HEL-H	Heavy Helicopter
HELI	Heliport
HEL-L	Light helicopter
HEL-M	Medium Helicopter
HEP	Human Error Probability
HF	High Frequency
HGV	Heavy Goods Vehicles (road)
HIRL	High intensity runway lights
HMCG	Her Majesty's Coast Guard
HNGR	Hangar
HOP	Helicopter operations; hand-off point
HRA	Human Reliability Analysis
HSC	High Speed Craft
HSCD	High Speed Circuit Switched Data
HTML	Hyper Text Mark-Up Language
HTTP	Hyper Text Transfer Protocol
HUB	Area designation based on level of enplanedpassengers
HVAC	Heating, ventilating and air conditioning
HWY	Highway
Hz	Hertz (frequency – electrical)
I
IAF	Initial approach fix
IALA	International Authority of Lighthouse Associations (waterborne)
IAPA	Instrument approach procedure automation
IATA	International Air Transport Association (air)
ICAO	International Civil Aviation Organisation (air) Promotes understanding and security through cooperative aviation regulation.
ICAO	International Civil Aviation Organization
ICCS	Integrated Coastguard Communication System (waterborne)
ICD	Interface control document
ICSS	Integrated communications switching system
ICT	Information and Communication Technology
ID	Identification
IEC	International Electro-technical Commission.
IEEE	Institute of Electrical and Electronics Engineers.
IFILS	Instrument landing system
IFPS	Integrated Initial Flight Plan Processing System of -> CFMU (air)
IFPU	Initial Flight Plan Processing Unit (air)
IFR	Instrument flight rules
IFTDGN	International Forwarding and Transport Dangerous Goods Notification message
IHO	International Hydrographic Organisation
ILO	International Labour Organisation
ILS	Instrument landing system
IM	Inner marker
IMC	Instrument meteorological conditions
IMDG	International Maritime Dangerous Goods Code
IMO	International Maritime Organisation
IMO FAL Form 1	General declaration
IMO FAL Form 2	Cargo Declaration (commonly replaced by standardised cargo manifests)
IMO FAL Form 3	Ship's Store Declaration
IMO FAL Form 4	Crew's Effects declaration
IMO FAL Form 5	Crew List
IMO FAL Form 6	Passenger List (ships carrying max. 12 passengers)
IMO FAL forms	Ship declaration forms by the -> IMO
INDRIS	Inland Navigation Demonstrator of River Information Services (waterborne)
INM	Integrated noise model
INST	Instrument
IOS	Initial operating capability
IP	Internet Protocol
IR	Ice on runway
IRPS	Inter-urban Road pricing schemes (road)
ISDN	Integrated Services Digital Network
ISI	Inter System Interface
ISM	International Safety Management
ISO	International Organization for Standardisation
ISP	Internet Service Provider
ISPS Code	International Ship and Port Facility Security Code
ITE	Integrated Transport Environment
ITNRNT	Itinerant
ITU	International Telecommunication Union
J
JAL	Jet approach landing charts
JCTN	Junction
JIT	Just In Time
JTSTR	Jet stream
K
KAREN	Keystone Architecture Required for European Networks (road)
khz	Kilohertz
KM	Kilometers
KPI	Key Performance Indicator
KT	Knots; knowledge management
kW	Kilowatt
L
LAN	Local area network
LAT	Latitude
LCOM	Compass locator at ILS middle marker
LDA	Localizer type directional aid; landing distanceavailable
LDIN	Lead in lighting system
LDN	Day-night average noise level
LED	Liquid electronic Display
LIRL	Low intensity runway edge lights
LIRS	Low-impact resistant supports
LLWAS	Low level wind shear alert system
LMS	Lease management system
LOA	Letter of agreement
LOC	Localizer
LOI	Letter of intent
LONG	Longitude
LORAN-C	A low frequency hyperbolic radio navigation system
LRG	Long range aircraft
LRM	Logistics Resource Management
LST	Local standard time
LTF	Local training flight
M
MACH	Speed ratio to speed of sound
MAEW	Men and equipment working
MAIB	Marine Accident Investigation Branch (of the UK Government)
MALS	Medium intensity approach lighting system
MALSF	Medium intensity approach lighting system withsequenced flashers
MALSR	Medium intensity approach lighting system withrunway alignment indicator lights
MAP	Missed approach point; million annualpassengers
MARPOL	Marine Pollution
MARPT	Municipal airport
MB	Marker beacon; megabytes
MBE	Minority business enterprise
MCA	Maritime and Coastguard Agency
MCA	Minimum crossing altitude
MCC	Mission Control Centre, ground station of COSPAS-SARSAT satellite system
MCC	Maintenance control center
MDA	Minimum descent altitude
MEA	Minimum enroute altitude
MEO	Medium Earth Orbit
MF	Medium Frequency
MFL	Maintain flight level
MFS	Master flight schedule
MGR	Manager
MHz	Megahertz
MIRL	Medium intensity runway edge lights
MIS	Management information systems
MIT	Miles in trail
MLS	Microwave landing system
MM	Middle marker
MMS	Maintenance management system
MOA	Military operations area
Mode-S	Discrete addressable secondary radar system withdata link
MOU	Memorandum of Understanding
MRCC	Maritime Rescue and Co-ordination Centre. A RCC responsible for maritime search and rescue incidents
MRG	Medium Range Aircraft (air)
MRSC	Maritime Rescue subcentre. responsible for maritime -> SAR incidents
MSC	Mobile Switching Centre. Connects a wireless and public telephone network.
MSC	Marine Safety Committee
MSL	Mean sea level
MT	Mobile Terminal
MTC	Motorway Traffic Control Centre
MTR	Military training route
MUFIDS	Multi-user flight information display system
MVSP	Maintain visual separation
N
NAD	North American datum
NAF	Naval air facility
NAS	National Airspace System; Naval Air Station
NASA	National Aeronautics and Space Administration
NASP	National Airport System Plan
NATCAS	Navigation, air traffic control, and collisionavoidance system
NATS	Noise Abatement Test System
NAV	Sub-committee on Safety of Navigation (waterborne)
NAV	Navigation
NAVAID	Navigational aid
NAVD	North American vertical datum
NCDC	National Climatic Data Center
NDB/DME	NDB collocated with a DME
NDB	Non-directional beacon
NFDC	National flight data center
NGS	National geodetic survey
NIAC	NAS Information Architecture Committee (FAA)
NM	Nautical mile
NMS	Noise management system
NOAA	National Oceanic and AtmosphericAdministration
NOF	NOTAM Office
NOMS	Noise monitoring system
NORAD	North American Air Defense Command
NORST	No restrictions
NOS	National Oceanic Survey
NOTAM	Notice to Airmen
NP	Non-precision (markings)
NPI	Non-precision instrument
NPIAS	National Plan of Integrated Airport Systems
NPRM	Notice of proposed rulemaking
NRA	Non-rule action
NTIS	National Technical Information Service
NTP	Notice to proceed
NTSB	National Transportation Safety Board
NWS	National Weather Service
O
O&D	Origin & destination
OARTS	Oceanic Air Route Tracking System
OBC	On Board Computer
OBU	On Board Unit (road) typically for toll collection
OCIP	Owner-controlled insurance program
ODALS	Omnidirectional approach lighting system
ODBC	Open Database Connectivity, Microsoft-owned protocol for database access
OEM	Original Equipment Manufacturer
OFA	Object-free area
OFS	Official Shipping Number
OFZ	Object-free zone
OGC	Open Geospatial Consortium, Inc.
OM	Outer marker
OMS	Obstruction management system
OMT	Object Modelling Tool
OPRC	Oil Pollution preparedness, Response and Co-operation (waterborne)
OPS	Operations
ORL	Overrun lights
OSC	On scene Commander (rescue)
OSI	Open System Interconnection Standards
OSS	One Stop Shop
OVRN	Overrun
P
P	Precision (markings)
PA	Precision approach; pressure altitude
PABX	Private Automatic Branche Xchange
PAJA	Parachute jumping activities
PAPI	Precision approach path indicator
PAR	Precision approach radar
PAX	Precision approach radar
PBX	Private Branche eXchange
PCA	Preconditioned air
PCI	Pavement condition index
PCPN	Precipitation
PDA	Personal Digital Assistant
PDC	Pre-departure clearance
PDP	Position Data Provider
PFSO	Port Facility Security Officer
PIANC	Permanent International of Association Navigation Congresses, now International Navigation Association
PIR	Precision instrument runway
PLB	Passenger loading bridge
PLMN	Private Land Mobile Network
PML	Product Markup Language. A new XML dialect used in the context of -> ePC
PMS	Pavement management system
POA	Privately owned aircraft
PPP	Private-Public Partnership
PRA	Probabilistic Risk Analysis
PRIM	Primary
PRIRA	Primary radar
PROP	Propeller
PS	Passenger service
PSGR	Passenger
PSTN	Public Switched Telephony Network
PWC	Potable water cabinet
PWI	Proximity warning indicator
Q
QFLOW	Quota flow procedures
QUAD	Quadrant
R
R/W	Runway
RACON	Radar responder beacon
RAGF	Remote air-ground facility
RAID	Risk Analysis for ITS Deployment
RAIL	Runway alignment indicator lights
RATCF	Radar air traffic control facility (USN)
RCAG	Remote communications air-ground facility
RCC	Rescue Co-ordination Centre
RCF	Remote communications facility
RCL	Radio communications link
RCLM	Runway centerline marking
RCLS	Runway centerline light system
RCO	Route Charging Office (air)
RCO	Remote communications outlet
RCT	Ramp control tower
RDS	Radio Data System -> RDS-TMC
RDS-TMC	Radio Data System - Traffic Message Channel, FM Multiplex one-way communication used to transmit traffic information to road vehicles
REG	Regulation
REIL	Runway end identifier lights
RF	Radio Frequency
RF	Radio frequency
RFID	Radio Frequency Identification. Using active (powered) transponders or passive tags
RFP	Request for proposal
RFQ	Request for qualifications
RIS	River Information Services
RNAV	Area navigation
ROFA	Runway object-free area
ROTG	Rotating
ROW	Right of way
RPL	Repetitive Flight Plan Processing System of -> CFMU (air)
RPM	Revenue passenger miles
RPZ	Runway protection zone
RRL	Runway remaining lights
RRP	Runway reference point
RSA	Runway safety area
RSO	RRegistered Security Organization
RTA	Required Time of Arrival
RTE	Route
RTIS	Regional Traffic Information Service
RU	Rescue Unit
RV	Rescue Vessel. Long range seagoing craft (waterborne)
RV	Radar vector
RVR	Runway visual range
S
SA	System Architecture
SAGIS	State airport GIS
SALS	Short approach lighting system
SAR	Search and Rescue (air, sea)
SATIN	System Architecture and Traffic control Integration
SCADA	Supervisory Control And Data Acquisition. See for example, Dayton & Knight Ltf
SCC	Ship Control Centre (waterborne)
SCIP	Surveillance communications interfaceprocessor
SCM	Supply Chain Management
SCOOT	Split, Cycle and Offset Optimisation Technique, used in -> UTC (road)
SDS	Spatial data standard
SES	Ship Earth Station. An INMARSAT ship borne communication terminal which could be installed in a -> RCC (waterborne)
SFC	Surface
SFL	Sequence flashing lights
SIA	Standard instrument approach
SID	Standard instrument departure
SIM	Subscriber Identification Module
SL	Sea level
SLP	Slope
SM	Statute mile
SMGCS	Surface movement guidance and control system
SMNV	Standard Marine Navigation Vocubulary (waterborne)
SMPC	Standard Marine Communication Phrases (waterborne)
SMS (1)	Short Message Service
SMS (2)	Safety Management System
SMSA	Standard metropolitan statistical area
SMTP	Simple Mail Transfer Protocol
SOLAS	International Convention for the safety of Life at Sea
SONET	Synchronous optical network
SOP	Standard operating procedure
SRG	Short Range Aircraft (air)
SRR	Search and Rescue Region
SSALF	Simplified short approach lighting system withsequenced flashers
SSALR	Simplified short approach lighting system withrunway alignment indicator lights
SSALS	Simplified short approach lighting system
SSO	Ship Security Officer
SSR	Secondary surveillance radar
SSS	Short Sea Shipping (waterborne)
STAR	Standard terminal arrival route
STCW	International Convention on Standards of training, Certification and Watchkeeping for seafarers (waterborne)
STI	Strategic Traffic Information (waterborne)
STIS	Shipping Transport and Information Services (waterborne)
STOL	Short takeoff and landing
SWY	Stopway
SYS	System
T
TAC	Terminal area chart
TACAN	Tactical air navigational aid
TACT	Tactical Database of -> CFMU (air)
TAD	ATC tower, approach and departure controlfacility
TARDIS	Traffic and Roads- DRIVE Integrated Systems (road)
TASR	Terminal area surveillance radar
TBD	To be determined
TBS	Transmission-Based Signalling (rail)
TCA	Terminal control area
TCH	Threshold crossing height
TCMS	Transport Chain Management System
TCP/IP	Transmission Control Protocol / Internet Protocol
TDMA	Time Division Multiple Access
TDWR	Terminal Doppler weather radar
TDZ	Touchdown zone
TDZL	Touchdown zone light (system)
TELCO	Telecommunications
TEN	Trans-European network
TERPS	Terminal instrument procedures
TETRA	Terrestrial Trunked RAdio
TFC	Traffic
TGL	Touch and go landing
TH	Threshold
TIC	Traffic Information Centre
TICS	Transport Information and Control Systems
TIPS	Terminal information processing system
TKOF	Takeoff
TL	Taxilane
TMC	Traffic Message Channel; road-side sensors transmit traffic information via -> TIC and -> RDS-TMC to vehicles
TMC	Traffic management coordinator
TMS