AIP for GAMBIA (section GEN-2.2) valid from 23 JAN 2025

GEN 2 Tables and Codes

GEN 2.2 ABBREVIATIONS

A

A	Amber	AAA	(or AAB, AAC...etc., in sequence) Amended meteorological message (message type designator)
A/A	Air-to-air	AAD	Assigned altitude deviation
AAIM	Aircraft autonomous integrity monitoring	AAL	Above aerodrome level
ABM	Abeam	ABN	Aerodrome beacon
ABT	About	ABV	Above
AC	Altocumulus	ACARS	Aircraft communication addressing and reporting system
		ACAS	Airborne collision avoidance system
ACC	Area control centre or area control	ACCID	Notification of an aircraft accident
ACFT	Aircraft	ACK	Acknowledge
ACL	Altimeter check location	ACN	Aircraft classification number
ACP	Acceptance (message type designator)	ACPT	Accept or accepted
ACT	Active or activated or activity	AD	Aerodrome
ADA	Advisory area	ADDN	Addition or additional
ADF	Automatic direction finding	ADIZ	(to be pronounced "AY-DIZ") Air defense identification zone
		ADJ	Adjacent
ADR	Advisory route	ADS	Automatic dependent surveillance
ADSU	Automatic dependent surveillance unit	ADVS	Advisory service
ADZ	Advise	AES	Aircraft earth station
AFIL	Flight plan filed in the air	AFIS	Aerodrome flight information service
AFM	Yes or affirm or affirmative or that is correct	AFS	Aeronautical fixed service
AFT	After... (time or place)	AFTN	Aeronautical fixed telecommunication network
		A/G	Air-to-Ground
AGA	Aerodromes, air routes and ground aids	AGL	Above ground level
AGN	Again	AIC	Aeronautical information circular
AIDC	Air traffic services interfacility data communications
AIP	Aeronautical information publication	AIRAC	Aeronautical Information regulation and control
		AIREP	Air-report
AIRMET	Information concerning en-route weather phenomena which may affect the safety of low-level aircraft operations
		AIS	Aeronautical information services
ALA	Alighting area	ALERFA	Alert phase
ALR	Alerting (message type designator)	ALRS	Alerting service
ALS	Approach lighting system	ALT	Altitude
ALTN	Alternate or alternating (light alternates in colour)	ALTN	Alternate (aerodrome)
AMA	Area minimum altitude	AMD	Amendment (amend, amended) (used to indicate amended meteorological message; message type designator)
AMDT	Amendment (AIP amendment)	AMS	Aeronautical mobile service
AMSL	Above mean sea level	AMSS	Aeronautical mobile satellite service
ANC...	Aeronautical chart - 1:500.000 (followed by name/title)	ANCS	Aeronautical navigation chart - small scale (followed by name/title and scale)
		ANS	Answer
AOC	Aerodrome obstacle chart	AP	Airport
APAPI	Abbreviated precision approach path indicator
APCH	Approach	APDC	Aircraft parking/docking chart
APN	Apron	APP	Approach control office or approach control or approach control service
		APR	April
APRX	Approximate or approximately	APSG	After passing
APV	Approve (approved, approval)	ARC	Area chart
ARFOR	Area forecast (in aeronautical meteorological code)
ARNG	Arrange	ARO	Air traffic services reporting office
ARP	Aerodrome reference point	ARP	Air-report (message type designator)
ARQ	Automatic error correction	ARR	Arrive or arrival
ARR	Arrival (message type designator)	ARST	Arresting (specify (part of) aircraft arresting equipment)
		AS	Altostratus
ASC	Ascend to or ascending to	ASAP	As soon as possible
ASC	Ascend or ascending to	ASDA	Accelerate stop distance available
ASE	Altimetry system error	ASHTAM	Special series of NOTAM notifying, by means of a specific format, change in activity of a volcano, a volcanic eruption
			and/or volcanic ash cloud that is of significance to aircraft operations
ASPEEDG	Airspeed gain	ASPEEDL	Airspeed loss
ASPH	Asphalt	AT...	At (followed by time at which weather change is forecast to occur)
		ATA	Actual time of arrival
ATC	Air traffic control (in general)	ATD	Actual time of departure
ATFM	Air traffic flow management	ATIS	Automatic terminal information service
ATM	Air traffic management	ATN	Aeronautical telecommunication network
ATP	At... (time or place)	ATS	Air traffic services
ATTN	Attention	A
AT-VASIS	Abbreviated T visual approach slope indicator system	ATZ	Aerodrome traffic zone
AUG	August	AUTH	Authorized or authorization AUW All up weight
AUX	Auxiliary	AVBL	Available or availability
AVG	Average	AVGAS	Aviation gasoline
AWTA	Advise at what time able AWY Airway	AZM	Azimuth

B

B	Blue	B
BA	Braking action	BARO- VNAV	Barometric vertical navigation BASE Cloud base
BCFG	Fog patches	BCN	Beacon (aeronautical ground light) BCST Broadcast
BDRY	Boundary BECMG Becoming BFR Before	BKN	Broken
BL...	Blowing (followed by DU=dust, SA=sand or SN=snow)	BLDG	Building
BLO	Below clouds	BLW	Below...
BOMB	Bombing	BR	Mist
BRF	Short (used to indicate the type of approach desired or required)	BRG	Bearing
BRKG	Braking	BS	Commercial broadcasting station
BTL	Between layers	BTN	Between

C

C	Center (runway identification)
C	Degrees celsius (centigrade)	CAT	Category
CAT	Clear air turbulence	CAVOK	(to be pronounced "KAV-OH-KAY") Visibility, cloud and present weather better than prescribed values or conditions
CB	(to be pronounced "CEE BEE") Cumulonimbus	CC	Cirrocumulus
CCA	(or CCB, x:td ...etc., in sequence) Corrected meteorological message (mes- sage type designator)	CD	Candela
CDN	Co-ordination (message type designator) CF Change frequency to...	CFM	Confirm
CGL	Circling guidance light(s)	CH	Channel
CHG	Modification (message type designator) CI Cirrus	CIDIN	Common ICAO data interchange network CIT Near or over large towns
CIV	Civil	CK	Check
CL	Centre line	CLA	Clear type of ice formation
CLBR	Calibration	DETRESFA	Distress phase
DEV	Abbreviated T visual approach slope indi- cator system	CLD	Cloud
CLG	Calling	CLR	Clear(s) or cleared to... or clearance
CLRD	Runway(s) cleared	CLSD	Closed or close or closing
CM	Centimetre	CMB	Climb to or climbing to
CMPL	Completion or completed or complete	CNL	Cancel or canceled
CNL	Flight plan cancellation (message type designator)
CNS	Communications, navigation and surveillance
COM	Communications	CONC	Concrete
COND	Condition	CONS	Continuous
CONST	Construction or constructed	CONT	Continue(s) or continued
COOR	Co-ordination	COP	Change-over point
COR	Correct or correction or corrected (used to indicate corrected meteorological message; (message type designator)
		COT	At the coast
COV	Cover or covered or covering	CPDLC	Controller-pilot data link communications
CPL	Current flight plan (message type designator)
CRC	Cyclic redundancy check	CRM	Collision risk model
CRZ	Cruise	CS	Cirrostratus
CTA	Control area	CTAM	Climb to and maintain
CTC	Contact	CTL	Control
CTN	Caution	CTR	Control zone
CU	Cumulus	CUF	Cumuliform
CUST	Customs	CVR	Cockpit voice recorder
CW	Continuous wave	CWY	Clearway

D

D	Danger area (followed by identification)
D	Downward (tendency in RVR during previous 10 minutes)
DA	Decision altitude	D-ATIS	Data link automatic terminal information service
		DCD	Double channel duplex
DCKG	Docking	DCP	Datum crossing point
DCPC	Direct controller-pilot communications	DCS	Double channel simplex
DCT	Direct (in relation to flight plan clearances and type of approach)
DEC	December	DEG	Degrees
DEP	Departure or depart	DEP	Departure (message type designator)
DER	Departure end of the runway	DES	Descend to or descending to
DEST	Destination	DF	Direction finding
DFDR	Digital flight data recorder	DFTI	Distance from touchdown indicator
DGCAM*	Directorate General of Civil Aviation and Meteorology
DH	Decision height	DIF	Diffuse
DIST	Distance	DIV	Divert or diverting
DLA	Delay (message type designator)	DLA	Delay or delayed
DME	Distance measuring equipment	DNG	Danger or dangerous
DOM	Domestic	DP	Dew point temperature
DPT	Depth	DR	Dead reckoning
DR	Low drifting (followed by DU=dust, SA=sand or SN=snow)
DRG	During	DS	Duststorm
DSB	Double sideband	DTAM	Descend to and maintain
DTG	Date-time group	DTRT	Deteriorate or deteriorating
DTW	Dual tandem wheels	DU	Dust (widespread)
DUC	Dense upper cloud	DUR	Duration
DVOR	Doppler VOR	DW	Dual wheels
DZ	Drizzle

E

E	East or eastern longitude	EAT	Expected approach time
EB	Eastbound	ECOWAS	Economic community of west african states
		EDA	Elevation differential area
EET	Estimated elapsed time	EFC	Expect further clearance
EHF	Extremely high frequency (30 000 to 300 000 MHZ)
ELBA	Emergency location beacon - aircraft	ELEV	Elevation
ELR	Extra long range	ELT	Emergency locator transmitter
EM	Emission	EMBD	Embedded in layer (to indicate cumulonimbus embedded in layers of other clouds)
		EMERG	Emergency
END	Stop-end (related to RVR)	ENE	East north east
ENG	Engine	ENR	En route
ENRC	Enroute chart	EOBT	Estimated off-block time
EQPT	Equipment	ER	Here... or herewith
ESE	East south east	EST	Estimate or estimated or estimate (message type designator)
		ETD	Estimated time of departure or estimating departure
ETA	Estimated time of arrival or estimating arrival	ETO	Estimated time over significant point
EV	Every	EXC	Expect
EXER	Exercises or exercising or to exercise	EXP	Expect or expected or expecting
EXTD	Extend or extending

F

F	Fixed	FA	Course from a fix to an altitude
FAC	Facilities	FAF	Final approach fix
FAL	Facilitation of international air transport	FAP	Final approach point
FAS	Final approach segment	FATO	Final approach and take-off area
FAX	Facsimile transmission	FBL	Light (used to indicate the intensity of weather phenomena, interference or static reports, e.g. FBL RA = light rain)
FC	Funnel cloud (tornado or waterspout)	FDPS	Flight data processing system
FCST	Forecast	FCT	Friction coefficient
FEB	February	FG	Fog
FIC	Flight information centre	FIR	Flight information region
FIS	Flight information service	FISA	Automated flight information service
FL	Flight level	FLD	Field
FLG	Flashing	FLR	Flares
FLT	Flight	FLTCK	Flight check
FLUC	Fluctuating or fluctuation or fluctuated	FLW	Follow(s) or following
FLY	Fly or flying	FM	From
FM...	From (followed by time weather change is forecasted to begin)
FMC	Flight management computer	FMS	Flight management system
FMU	Flow management unit	FNA	Final approach
FPAP	Flight path alignment point	FPL	Filed flight plan (message type designator)
FPM	Feet per minute	FPR	Flight plan route
FR	Fuel remaining	FREQ	Frequency
FRI	Friday	FRNG	Firing
FRONT	Front (relating to weather)	FRQ	Frequent
FSL	Full stop landing	FSS	Flight service station
FST	First	FT	Feet (dimensional unit)
FTE	Flight technical error	FTP	Fictitious threshold point
FTT	Flight technical tolerance	FU	Smoke
FZ	Freezing	FZDZ	Freezing drizzle
FZFG	Freezing fog	FZRA	Freezing rain

G

G	Green
G/A	Ground-to-air	G/A/G	Ground-to-air and air-to-ground
GALL	Imperial gallons
GCAA*	Gambia civil aviation authority	GCA	Ground controlled approach system or ground controlled approach
GEN	General	GEO	Geographic or true
GES	Ground earth station	GLD	Glider
GND	Ground GNDCK Ground check	GNSS	Global navigation satellite system GP Glide path
GR	Hail	GRASS	Grass landing area
GRID	Processed meteorological data in the form of grid point values (in aeronautical meteorological code)	GRVL	Gravel
GS	Ground speed	GS	Small hail and/or snow pellets

H

H	High pressure area	HAPI	Helicopter approach path indicator
H24	Continuous day and night service	HDG	Heading
HBN	Hazard beacon	HGT	Height or height above
HDF	High frequency direction-finding station	HEL	Helicopter
HF	High frequency (3 000 to 30 000 KHz)	HJ	Sunrise to sunset
HLDG	Holding	HM HN	Holding/racetrack to a manual termination Sunset to sunrise
HO	Service available to meet operational requirements	HOL	Holiday
HOSP	Hospital aircraft	HPA	Hectopascal
HQ*	Headquarters	HR	Hours
HS	Service available during hours of sched- uled operations	HURCN	Hurricane
HVDF	High and very high frequency direction- finding stations (at the same location)	HVY	Heavy
HVY	Heavy (used to indicate the intensity of weather phenomena, e.g. HVY RA=heavy rain)	HX	No specific working hours
HYR	Higher	HZ	Haze


I

IAC	Instrument approach chart	IAF	Initial approach fix
IAO	In and out of clouds	IAP	Instrument approach procedure
IAR	Intersection of air routes	IAS	Indicated air speed
IBN	Identification beacon	IC	Ice crystals (very small in suspension also known as diamond dust)
		ICE	Icing
ID	Identifier or identify	IDENT	Identification
IF	Intermediate approach fix	IFF	Identification friend/foe
IFR	Instrument flight rules	IGA	International general aviation
ILS	Instrument landing system	IM	Inner marker
IMC	Instrument meteorological conditions	IMG	Immigration
IMPR	Improve or improving	IMT	Immediate or immediately
INA	Initial approach	INBD	Inbound
INC	In cloud	INCERFA	Uncertainty phase
INFO	Information	INOP	Inoperative
INP	If not possible	INPR	In progress
INS	Inches (dimensional unit)	INS	Inertial navigation system
INSTL	Install or installed or installation	INSTR	Instrument
INT	Intersection	INTL	International
INTRG	Interrogator	INTRP	Interrupt or interruption or interrupted
INTSF	Intensify or intensifying	INTST	Intensity
IR	Ice on runway	ISA	International standard atmosphere
ISB	Independent sideband	ISOL	Isolated
I/V	Instrument / visual

J

JAN	January	JTST	Jet stream
JUL	July	JUN	June

K

KG	Kilograms
KHz	Kilohertz	KM	Kilometres
KMH	Kilometres per hour	KPA	Kilopascal
Kts	Knots	KW	Kilowatts

L

L	Left (runway identification)
L	Locator (see LM, LO)
LAM	Logical acknowledgement (message type designator)	LAN	Inland
LAT	Latitude	LCA	Local or locally or location or located
LDA	Landing distance available	LDAH	Landing distance available, helicopter
LDG	Landing	LDI	Landing direction indicator
LEN	Length	LF	Low frequency (30 to 300 KHz)
LGT	Light or lighting	MOC	Minimum obstacle clearance (required)
LIH	Light intensity high	LIL	Light intensity low
LIM	Light intensity medium	LLZ	Localizer
LM	Locator, middle	LMT	Local mean time
LNG	Long (used to indicate the type of approach desired or required)
LO	Locator, outer	LOC	Local or locally or location or located
LONG	Longitude	LORAN	LORAN (long range air navigation system)
LRG	Long range	LSQ	Line squall
LTD	Limited	LTT	Landline teletypewriter
LV	Light and variable (relating to wind)	LVE	Leave or leaving
LVL	Level	LVP	Low visibility procedures
LYR	Layer or layered

M

M	Mach number, followed by figures	m	Meters (am.spelling), preceded by figures
MAA	Maximum authorized altitude	MAG	Magnetic
MAINT	Maintenance	MAP	Aeronautical maps and charts
MAPT	Missed approach point	MAR	At sea
MAR	March	MAS	Manual A1 simplex
MATF	Missed approach turning fix	MAX	Maximum
MAY	May	MBST	Microburst
MCA	Minimum crossing altitude	MCW	Modulated continuous wave
MDA	Minimum descent altitude	MDF	Medium frequency direction-finding station
MDH	Minimum descent height	MEA	Minimum en-route altitude
MEHT	Minimum eye height above threshold (for visual approach slope indicator systems)
MET	Meteorology or meteorological	METAR	Aviation routine weather report (in aeronautical meteorological code)
		MF	Medium frequency (300 to 3 000 KHz)
MHDF	Medium and high frequency direction-finding stations (at the same location)
MHVDF	Medium, high and very high frequency direction-finding stations (at the same location)
		MHZ	Megahertz
MID	Mid-point (related to RVR)	MIFG	Shallow fog
MIL	Military	MIN	Minutes
MKR	Marker radio beacon	MLS	Microwave landing system
MM	Middle marker	MNM	Minimum
MNPS	Minimum navigation performance specifications
MNT	Monitor or monitoring or monitored	MNTN	Maintain
MOA	Military operating area	PTN	Procedure turn
MOD	Moderate (used to indicate the intensity of weather phenomena, interference or static reports, e.g. MOD RA=moderate rain)	MON	Monday
MON	Above mountains	MOTNE	Meteorological operational telecommunications network europe
MOV	Move or moving or movement	MPS	Metres per second
MRA	Minimum reception altitude	MRG	Medium range
MRP	ATS/MET reporting point	MS	Minus
MSA	Minimum sector altitude	MSG	Message
MSL	Mean sea level Mountain	MT	Mountain
MTU	Metric units	MTW	Mountain waves
MVDF	Medium and very high frequency direction finding stations (at the same location)	MWO	Meteorological watch office
MX	Mixed type of ice information (white and clear)	N	North or northern latitude

N

N	No distinct tendency (in RVR during previ- ous 10 minutes)	N/A*	Not applicable
NAT	Not applicable	NAV	Navigation
NB	Northbound	NBFR	Not before
NC	No change	NDB	Non directional radio beacon
NE	North-east	NEB	North-eastbound
NEG	Negative or no or permission not granted or that is not correct	NGT	Night
NIL	None or I have nothing to send to you	NM	Nautical miles
NML	Normal	NNE	North north east
NNW	North north west	NOF	International NOTAM office
NOSIG	No significant change (used in trend-type landing forecasts)	NOTAM	A notice containing information concerning the establishment, condition or change in anyaeronautical facility, service, procedure or hazard, the timely knowledge of which is essential to personnel concerned withflight operations
NOV	November	NPA	Non-precision approach Number
NR	Number	NRH	No reply heard
NS	Nimbostratus	NSC	Nil significant cloud
NSE	Navigation system error	NSW	Nil significant cloud Navigation system error Nil significant weather
NTL	National	NW	North-west
NWB	North-westbound	LGTD	Lighted

O

OAC	Oceanic area control centre	OAS	Obstacle assessment surface
OBS	Observe or observed or observation	OBSC	Obscure or obscured or obscuring
OBST	Obstacle	OCA	Obstacle clearance altitude
OCA	Oceanic control area	OCC	Occulting (light)
OCH	Obstacle clearance height	OCL	Obstacle clearance limit
OCNL	Occasional or occasionally	OCS	Obstacle clearance surface
OCT	October	OHD	Overhead
OM	Outer marker	OPA	Opaque, white type of ice formation
OPMET	Operational meteorological (information)	OPN	Open or opening or opened
OPR	Operator or operate or operative or operating or operational
OPS	Operations	O/R	On request
ORD	Indication of an order	OSV	Ocean station vessel
OTLK	Outlook (used in SIGMET messages for volcanic ash and tropical cyclones)
OTP	On top	OTS	Organized track system
OUBD	Outbound	OVC	Overcast

P

P...	Prohibited area (followed by identification)
PALS	Precision approach lighting system (specify category)
PANS	Procedures for air navigation services	PAPI	Precision approach path indicator
PAR	Precision approach radar	PARL	Parallel
PAX	Passenger(s)	PCD	Proceed or proceeding
PCN	Pavement classification number	PE	Ice pellets
PER	Performance	PERM	Permanent
PJE	Parachute jumping exercise	PLA	Practice low approach
PLN	Flight plan	PLVL	Present level
PN	Prior notice required	PNR	Point of no return
PO	Dust/sand whirls (dust devils)	POB	Persons on board
POSS	Possible	PPI	Plan position indicator
PPO	Prior permission only	PPR	Prior permission required
PPSN	Present position	PRI	Primary
PRKG	Parking	PROB	Probability
PROC	Procedure	PROV	Provisional
PS	Plus	PSG	Passing
PSN	Position	PSP	Pierced steel plank
PTS	Polar track structure	PWR	Power

Q

QBI	Compulsory IFR flight
QDM	Magnetic heading (zero wind)	QDR	Magnetic bearing
QFE	Atmospheric pressure at aerodrome eleva- tion (or at runway threshold)	QFU	Magnetic orientation of runway
QNH	Altimeter sub-scale setting to obtain eleva- tion when on the ground	QTE	true bearing Quadrant
QUAD	Quadrant

R

R	Red	R...	Restricted area (followed by identification)
R	Right (runway identification)	RA	Rain
RAC	Rules of the air and air traffic services	RAFC	Regional area forecast centre
RAG	Ragged	RAG	Runway arresting gear
RB	Rescue boat	RCA	Reach cruising altitude
RCC	Rescue co-ordination centre	RCF	Radiocommunication failure (message type designator)
RCH	Reach or reaching	RCL	Runway centre line
RCLL	Runway centre line light(s)	RCLR	Recleared
RDH	Reference datum height (for ILS)	RDL	Radial
RDO	Radio	RE...	Recent (used to qualify weather phenom- ena, e.g. RERA=recent rain)
REC	Receive or receiver	REDL	Runway edge light(s)
REF	Reference to ... or refer to ...	REG	Registration
RENL	Runway end light(s)	REP	Report or reporting or reporting point
REQ	Request or requested	RERTE	Reroute
RG	Range (lights)	RIF	Reclearance in flight Right (direction of turn) Report leaving
RITE	Right (direction of turn)	RL	Report leaving
RLA	Relay to	RLCE	Request level change en route
RLLS	Runway lead-in lighting system	RLNA	Request level not available
RMK	Remark	RNAV	(to be pronounced "AR_NAV") Area navigation
RNG	Radio range	RNP	Required navigation performance
ROBEX	Regional OPMET bulletin exchange (scheme)	ROC	Rate of climb
ROD	Rate of descent	ROFOR	Route forecast (in aeronautical meteoro- logical code)
RON	Receiving only	RPL	Repetitive flight plan
RPLC	Replace or replaced	RPS	Radar position symbol
RQP	Request flight plan (message type designator)
RQS	Request supplementary flight plan (message type designator)	RQMNTS	Requirements
RR	Report reaching	RRA	(or RRB, RRC ... etc., in sequence)
	Delayed meteorological message (mes-		sage type designator)
RSC	Rescue sub-centre	RSCD	Runway surface condition
RSP	Responder beacon	RSR	En-route surveillance radar
RTD	Delayed (used to indicate delayed meteorological message; message type designator)	RTE	Route
RTF	Radiotelephone	RTG	Radiotelegraph
RTHL	Runway threshold light(s)	RTN	Return or returned or returning
RTODAH	Rejected take-off distance available, heli-		copter
RTS	Return to service	RTT	Radioteletypewriter
RTZL	Runway touchdown zone light(s)	RUT	Standard regional route transmitting frequencies
		RV	Rescue vessel
RVR	Runway visual range	RWY	Runway
NXT	Next

S

S	South or southern latitude
SA	Sand	SALS	Simple approach lighting system
SAN	Sanitary	SAP	(As) soon as possible
SAR	Search and rescue	SARPS	Standards and recommended practices (ICAO)
		SAT	Saturday
SATCOM	Satellite communication	SB	Southbound
SC	Stratocumulus	SCT	Scattered
SDBY	Stand by	SE	South-east
SEB	South-eastbound	SEC	Seconds
SECT	Sector	SELCAL	Selective calling system
SEP	September	SER	Service or servicing or served
SEV	Severe (used e.g., to qualify icing and turbulence reports)
SFC	Surface	SG	Snow grains
SGL	Signal	SH ...	Shower (followed by RA=rain, SN=snow, PE=ice pellets, GR=hail, GS=small hail and/or snow pellets or combinations thereof, e.g., SHRASN=showers of rain and snow)
SHF	Super high frequency (3 000 to 30 000 MHZ)
SID	Standard instrument departure	SIF	Selective identification feature
SIGMET	Information concerning en-route weather phenomena which may affect the safety of aircraft operations	SIGWX	Significant weather
SIMUL	Simultaneous or simultaneously	SITA*	Societe internationale telecommunication aeronautique
SIWL	Single isolated wheel load	SKC	Sky clear
SKED	Scheduled or schedule	SLP	Speed limiting point
SLW	Slow	SMC	Surface movement control
SMR	Surface movement radar	SN	Snow
SPECI	Aviation selected special weather report (in aeronautical meteorological code)	SPECIAL	Special meteorological report (in abbrevi- ated plain language)
SPL	Supplementary flight plan (message type designator)	SPOT	Spot wind
SQ	Squall	SR	Sunrise
SRA	Surveillance radar approach	SRE	Surveillance radar element of precision approach radar system
SRG	Short range	SRR	Search and rescue region
SRY	Secondary	SS	Sandstorm
SS	Sunset	SSB	Single sideband
SSE	South south east	SSR	Secondary surveillance radar
SST	Supersonic transport	SSW	South south west
ST	Stratus	STA	Straight in approach
STAR	Standard instrument arrival	STD	Standard
STF	Stratiform	STN	Station
STNR	Stationary	STOL	Short take-off and landing
STS	Status	STWL	Stopway light(s)
SUBJ	Subject to	SUN	Sunday
SUP	Supplement (AIP Supplement)	SUPPS	Regional supplementary procedures
SVC	Service message	SVCBL	Serviceable
SVFR*	Special visual flight rules	SW	South-west
SWB	South-westbound	SWY	Stopway

T

T	Temperature
TA	Transition altitude	TACAN	UHF tactical air navigation aid
TAF	Aerodrome forecast	TAIL	Tail wind
TAR	Terminal area surveillance radar	TAS	True airspeed
TAX	Taxiing or taxi
T C	Tropical cyclone	TCU	Towering cumulus
TDO	Tornado	TDZ	Touchdown zone
TECR	Technical reason	TEL	Telephone
TEMPO	Temporary or temporarily	TEND	Trend forecast
TFC	Traffic	TGL	Touch-and-go landing
TGS	Taxiing guidance system	THR	Threshold
THRU	Through	THU	Thursday
TIL	Until	TIP	Until past ... (place)
TKOF	Take-off	TL ...	Till (followed by time by which weather change is forecast to end)
		TLOF	Touchdown and lift-off area
TMA	Terminal control area	TNA	Turn altitude
TNH	Turn height	TO	To ... (place)
TOC	Top of climb	TODA	Take-off distance available
TODAH	Take-off distance available, helicopter	TOP	Cloud top
TORA	Take-off run available	TP	Turning point
TR	Track	TRA	Temporary reserved airspace
TRANS	Transmits or transmitter	TRL	Transition level
TROP	Tropopause	TS	Thunderstorm (in aerodrome reports and forecasts, TS used alone means thunder heard but no precipitation at the aerodrome) SN=snow, PE=ice pellets, GR=hail,
TS ...	Thunderstorm (followed by RA=RAIN,GS=small hail and/or snow pellets or combinations thereof, e.g., TSRASN=thunderstorm with rain and snow)	TUE	Tuesday
TT	Teletypewriter	TVOR	Terminal VOR control
TURB	Turbulence	TWYL	Taxiway-link
TWR	Aerodrome control tower or aerodrome	TYPH	Typhoon
TWY	Taxiway	TYP	Type of aircraft

U

U	Upward (tendency in RVR during previous 10 minutes)
UAB	Until advised by ...
UAC	Upper area control centre	UAR	Upper air route
UDF	Ultra high frequency direction-finding station
UFN	Until further notice	UHDT	Unable higher due traffic
UHF	Ultra high frequency (300-3 000 MHZ)	UIC	Upper information centre
UIR	Upper flight information region	ULR	Ultra long range
UNA	Unable	UNAP	Unable to approve
UNL	Unlimited	UNREL	Unreliable
U/S	Unserviceable	UTA	Upper control area
UTC	Coordinated universal time

V

VA	Volcanic ash	VAC	Visual approach chart
VAL	In valleys	VAN	Runway control van
VAR	Magnetic variation	VAR	Visual-aural radio range
VASIS	Visual approach slope indicator system	VC	Vicinity of the aerodrome (followed by FG=fog, FC=funnel cloud, SH=showers, PO=dust/sand whirls, BLDU=blowingdust, BLSA=blowing sand or BLSN=blowing

			snow, e.g., VCFG=vicinity fog)
VCY	Vicinity	VDF	Very high frequency direction-finding station
		VER	Vertical
VFR	Visual flight rules	VHF	Very high frequency (30-300 MHZ)
VIA	By way of...	VIP	Very important person
VIS	Visibility	VLF	Very low frequency (3 to 30 KHz)
VLR	Very long range	VMC	Visual meteorological conditions
VOLMET	Meteorological information for aircraft in flight
VOR	VHF omnidirectional radio range	VORTAC	VOR and TACAN combination
VOT	VOR airborne equipment test facility	VRB	Variable
VSA	By visual reference to the ground	VSP	Vertical speed
VTOL	Vertical take-off and landing

W

W	West or western longitude	W	White
WAC	World aeronautical chart - ICAO 1:1.000.000
WAFC	World area forecast centre	WB	Westbound
WBAR	Wing bar lights	WDI	Wind direction indicator
WDSPR	Widespread	WED	Wednesday
WEF	With effect from or effective from	WHO*	World health organization
WI	Within	WID	Width
WIE	With immediate effect or effective immediately
WILCO	Will comply	WINTEM	Forecast upper wind and temperature for aviation
		WIP	Work in progress
WKN	Weaken or weakening	WNW	West north west
WO	Without	WPT	Way-point
WRNG	Warning	WS	Wind shear
WSW	West south west	WT	Weight
WTSPT	Waterspout	WX	Weather

X

X	Cross	XS	Atmospherics
XBAR	Crossbar (of approach lighting system)	XNG	Crossing

Y

Y	Yellow	YCZ	Yellow caution zone (runway lighting)
YR	Your

Z

Z	Co-ordinated universal time (in meteorological messages)

A - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z