Ilmailuaiheisia lyhenteitä

  A

Amber

AAA

(or AAB, AACetc., in sequence) Amended meteorological message (message type designator)

A/A

Air-to-air

AAD

Assigned altitude deviation (deviation between tranponder mode C and altitude)

AAIM

Aircraft autonomous integrity monitoring

AAL

Above aerodrome level

ABI

Advance boudary information

ABM

Abeam

ABN

Aerodrome besoon

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

ADC

Aerodrome chart

ADDN

Addition or additional

ADF

Automatio direction-finding equipment

ADIZ

Air defence identification zone

ADJ

Adjacent

ADO

Aerodrome office

ADR

Advisory route

ADS

Automatic dependent surveillance

ADVS

Advisory service

ADZ

Advise

AF

Air Force

AFIL

Fiight pian filed in the air

AFIS

Aerodrome flight information servies

AFM

Yes or affirm or aifirmative 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 Ievel

AGN

Again

AIC

Aeronautical information circular

AIDC

Air traffic services inter-facility data communication

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 ot Iow-Ievei aircraft operations

AIRPROX

Aircraft proximity

AIS

Aeronautical information services

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

AMC

Airspace Management Cell

AMD

Amend or amended

AMDT

Amendment (AlP Amendment)

AMS

Aeronautical mobile service

AMSL

Above mean sea level

ANC

Aeronautical chart 1:500 000

ANCS

Aeronautical navigation chart small scale

ANS

Answer

ANS

Air Navigation Service

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 services

APR

April

APRX

Approximate or approximately

APSG

After passing

APV

Approve or approved or approval

APV

Approach procedure with vertical guidance

ARC

Area chart

ARCC

Aeronautical Rescue Co-ordination Centre

ARCC

Aeronautical Rescue Co-ordination Centre

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 (can also be used in connection with ATC call sign)

ARR

Arrival (message type designator)

ARST

Arresting (specity (part of) aircraft arresting equipment)

AS

Altostratus

ASC

Ascend or ascending to

ASDA

Accelerate-stop distance available

ASE

Altimetry system error

ASPH

Asphalt

ASM

Airspace management

ASSW

Associated with

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

AT-VASIS

Abbreviated T visual approach slope indicator system

ATZ

Aerodrome traffic zone

AUG

August

AUP

Airspace use plan

AUTH

Authorized or authorization

AUW

All up weight

AUX

Auxiliary

AVASIS

Abbreviated visual approach slope indicator system

AVBL

Available or availability

AVG

Average

AVGAS

Aviation gasoline

AWY

Airway

AZM

Azimuth

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 [Alkuun]

  B

Blue

B-RNAV

Basic area navigation

BA

Braking action

BASE

Cloud base

BCFG

Fog patches

BCN

Beacon (aeronautical ground light)

BCST

Broadcast

BDRY

Boundary

BFR

Before

BKN

Broken

BL

Blowing (followed by DU, SA or SN)

BLDG

Building

BLO

Below clouds

BLW

Below…

BOMB

Bombing

BR

Mist

BRG

Bearing

BRKG

Braking

BS

Commercial broadcasting station

BTL

Between layers

BTN

Between

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 [Alkuun]

  C

Centre (runway identification)

C

Degrees Celsius (Centigrade)

CAT

Category

CAT

Clear air turbulence

CAVOK

(to be pronounced "KAV-OH-KAY'1) Visibility, cloud and present weather better than prescribed values or conditions

CB

(to be pronounced "CEE BEE") Cumulonimbus

CC

Cirrocumulus

CCA

(or CCB, CCC… etc,. in sequence) Corrected meteorological message (message type designator)

CD

Candela

CDN

Co-ordination (message type designator)

CFMU

Central Flow Management Unit

CGL

Circling guidance light(s)

CH

Channel

CHF

Chief, manager

CHG

Change, changes (on charts)

CHG

Modification (message type designator)

Cl

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

CLD

Cloud

CLG

Calling

CLR

Clear(s) or cleared to.. .or clearance

CLSD

Close or closed or closing

CM

Centimetre

CMB

Climb to or climbing to

CMPL

Completion or completed or complete

CNL

Cancel or cancelled

CNL

Flight plan cancellatlon (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-ordinate, co-ordination

COORD

Coordinates

COP

Change-over point

COR

Correct, correction or corrected

COT

At the cost

COV

Cover or covered or covering

CPDLC

Controller-pilot data link communications

CPL

Current flight plan (message type designator)

CRAM

Conditional route availability message

CRC

Cyclic redundancy check

CRZ

Cruise

CS

Call sign

CS

Cirrostratus

CTA

Control area

CTC

Contact

CTL

Control

CTN

Caution

CTR

Control zone

CU

Cumulus

CUF

Cumuliform

CUST

Customs

CVR

Cockpit voice recorder

CW

Continuous wave

CWY

Clearway

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 [Alkuun]

  D

Downward (tendency in RVR during previous 10 minutes

D…

Danger area (followed by identification)

DA

Decision altitude

D-ATIS

Data link automatic terminal information service

DCD

Double channel duplex

DCKG

Docking

DCPC

Direct controller-pilot communiucation

DCS

Double channel simplex

DCT

Direct (in relation to flight plan clearances and type of approach)

DEC

December

DEG

DEG Degrees

DEP

Depart or departure

DEP

Departure (message type designator)

DES

Descend to or descending to

DEST

Desunation

DETRESFA

Distress phase

DEV

Deviaton or deviating

DFDR

Digital flight data recorder

DH

Decision height

DIF

Diffuse

DIST

Distance

DIV

Divert or diverting

DLA

Delay (message type designator)

DLA

Delay or delayed

DLIC

Data link initiation capability

DLY

Daily

DME

Distance measuring equipment

DMN

Dimensions

DNG

Danger or dangerous

DOM

Domestic

DP

Dew point temperature

DPT

Depth

DR

Dead reckoning

DR…

Low drifting (followed by DU, SA or SN)

DRG

During

DS

Duststorm

DSB

Double sideband

DTG

Date-time group

DTHR

Displaced runway threshold

DTRT

Deteriorate or deteriorating

DTW

Dual tandem wheels

DU

Dust

DUC

Dense upper cloud

DUR

Duration

D-VOLMET

Data link VOLMET

DVOR

Doppler VOR

DW

Dual wheels

DZ

Drizzle

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 [Alkuun]

  E

East or eastern longitude

EAT

Expected approach time

EB

Eastbound

EET

Estimated elapsed time

EHF

Extremely high frequency (30000 to 300000 MHz)

ELBA

Emergency location beacon - aircraft

ELEV

Elevation

ELR

Extra long range

ELT

Emergency locator transmitter

EM

Emission

EMBD

Embedded in a layer (to indicate cumulonimbus embedded in layers of other clouds)

EMERG

Emergency

EN

English

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

ESE

East south east

EST

Estimate or estimated or estimate (message type designator)

ETA

Estimated time of arrival or estimating arrival

ETD

Estimated time of departure or estimating departure

ETO

Estimated time over significant point

EV

Every

EXC

Except

EXER

Exercises or exercising or to exercise

EXP

Expect or expected or expecting

EXTD

Extend or extending

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 [Alkuun]

  F

Fixed

FAC

Facilities

FAF

Final approach fix

FAL

Facilitation of international air transport

FAP

Final approach point

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. RA = light rain)

FC

Funnel cloud (tornado or water spout)

FCST

Forecast

FCT

Friction coefficient

FDPS

Flight data processing system

FEB

February

FEW

Few

FG

Fog

FI

Finnish

FIC

Flight information centre

FIR

Flight information region

FIS

Flight information service

FISA

Automated flight information service

FIZ

Flight information zone

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 forecast to begin)

FMP

Flow Management Position

FMS

Flight management system

FMU

Flow management unit

FNA

Final approach

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

FST

First

FT

Feet (dimensional unit)

FU

Smoke

FUA

Flexible use of airspace

FZ

Freezing

FZDZ

Freezing drizzle

FZFG

Freezing fog

FZRA

Freezing rain

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 [Alkuun]

  G

Green

G/A

Ground-to-air

G/A/G

Ground-to-air and air-to-ground

GAMET

Area forecast for low-level flights

GCA

Ground controlled appproach system or ground controlled approach

GEN

General

GEO

Geographic or true

GLD

Glider, gliding

CLONASS

Global orbiting navigation satellite system

GMC

Ground movement chart

GND

Ground

GNDCK

Ground check

GNSS

Global navigation satellite system

GP

Glide patn

GPS

Global positioning system

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 pelIets

GUND

Geoid undulation

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 [Alkuun]

  H24

Continuous day and night service

HAPI

Helicopter approach path indicator

HBN

Hazard beacon

HDF

High frequency direction-finding station

HDG

Heading

HEL

Helicopter

HF

High frequency (3 000- 30 000 kHz)

HGT

Height or height above

HJ

Sunrise to sunset

HLDG

Holding

HN

Sunset to sunrise

HO

Service available to meet operational requirements

HOL

Holiday

HOSP

Hospital aircraft

HPA

Hectopascal

HR

Hours

HS

Service available during hours of scheduled 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

HZ

Hertz (cycle per second)

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 [Alkuun]

  IAC

Instrument approach chart

IAF

Initial approach fix

IAO

In and out of clouds

IAP

Instrument approch procedure

IAR

Intersection of air routes

IAS

Indicated air speed

IBN

Identification beacon

IC

Ice crystals (very small ice crystals in suspension, also known as diamond dust)

ICE

Icing

ID

Identifier or identify

IDENT

Identification

IF

Intermediate approach fix

IFF

Identification friend / foe

IFPS

Integrated initial flight plan processing system

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

lnoperative

INP

If not possible

INPR

In progress

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

Intensity or intensifying

INTST

Intensity

IR

Ice on runway

ISA

International standard atmosphere

ISB

Independent sideband

ISOL

Isolated

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 [Alkuun]

  JAA

Joint Aviation Authorities

JAN

January

JTST

Jet stream

JUL

July

JUN

June

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 [Alkuun]

  KG

Kilograms

KHZ

Kilohertz

KM

Kilometres

KMH

Kilometres per hour

KPA

Kilopascal

KT

Knots

KW

Kilowatts

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 [Alkuun]

  L

Litre

L

Left (runway identification)

L

Locator (see LI, LM, LO)

LAN

Inland

LAT

Latitude

LDA

Landing distance available

LDAH

Landing distance available, helicopter

LDG

Landing, landing chart

LDI

Landing direction indicator

LEN

Length

LF

Low frequency (30 to 300 kHz)

LGT

Light or lighting

LGTD

Lighted

LI

Locator, inner

LIH

Light intensity high

LIL

Light intensity low

LIM

Light intensity medium

LLZ

Localizer

LM

Locator, middle

LMT

Local mean time

LO

Locator, outer

LOC

Local or locally or location or located

LONG

Longitude

LORAN

LORAN (long range air navigation system)

LRG

Long range

LTD

Limited

LTT

Landline teletypewriter

LV

Light and variable (relating to wind)

LVL

Level

LYR

Layer or layered

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 [Alkuun]

  M

Mach number (followed by figures)

M

Metres (preceded by figures)

MA

Missed approach

MAA

Maximum authorized altitude

MAHF

Missed approach holding fix

MAG

Magnetic

MAINT

Maintenance

MAP

Aeronautical maps and charts

MAPT

Missed approach point

MAR

At sea

MAR

March

MAS

Manual A1 simplex

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 over threshold (for visual approach slope indicator system)

MET

Meteorological or meteorology

METAR

Aviation routine weather report (in aeronautical meteorological code)

MF

Medium frequency (300 to 3000 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

MOC

Minimum obstacle clearance (required)

MOD

Moderate (used to indicate the intensity of weather phenomena, interference or static reports, e.g. MOD RA = moderate rain)

MON

Above mountains

MON

Monday

MOPS

Minimum operational performance standards

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

Mininium sector altitude

MSAW

Mininium safe altitude warning

MSG

Message

MSL

Mean sea level

MSSR

Monopulse secondary surveillance radar

MT

Mountain

MTOW

Maximum take-off weight

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 formation (white and clear)

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 [Alkuun]

  N

North or northern latitude

N

No distinct tendency (in RVR during previous 10 minutes)

NASC

National AIS system centre

NAT

North Atlantic

NAV

Navigation

NB

Northbound

NBFR

Not before

NC

No change

NDB

Non-directional radio beacon

NE

North-east

NEB

North-eastbound

NEG

No or negative or permission not granted or that is not correct

NGT

Night

NIA

No information available (for AIP)

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 any aeronautical facility, service, procedure or hazard, the timely knowledge of which is essential to personnel concerned with flight operations

NOV

November

NOZ

Normal operating zone

NPA

Non-precision approach procedure

NR

Number

NS

Nimbostratus

NSC

Nil significant cloud

NSW

Nil significant weather

NTL

National

NTZ

No transgression zone

NW

North-west

NWB

North-westbound

NXT

Next

NON

Unmodulated carrier

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 [Alkuun]

  OAS

Obstacle assessment surface

OBS

Observe or observed or observation

OBSC

Obscure or obscured or obscuring

OBST

Obstacle

OCA

Obstacle clearance altitude

OCC

Occulting (light)

OCH

Obstacle clearance height

OCNL

Occasional or occasionally

OCT

October

OFZ

Obstacle free zone

OLDI

On line data interchange

OHD

Overhead

OM

Outer marker

OPA

Opeque, 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

OTLK

Outlook (used in SIGMET messages for volcanic ash and tropical cyclones)

OTP

On top

OUBD

Outbound

OVC

Overcast

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 [Alkuun]

  P…

Prohibited area (followed by Identification)

PA

Precision approach procedure

PALS

Precision approach lighting system (spesify category)

PANS

Procedures for air navigation services

PAPI

Precision approach path indicator

PAR

Precision approach radar

PARL

Parallel

PATC

Precision approach terrain chart

PAX

Passenger(s)

PCL

Pilot controlled lighting

PCN

Pavement classification number

PDC

Aircraft parking / docking chart

PDG

Procedure design gradient

PE

Ice pellets

PER

Performance

PERM

Permanent

PIB

Pre-flight information bulletin

PJE

Parachute jumping exercise

PL

Ice Pellets

PLN

Flight plan

PN

Prior notice required

PO

Dust devils

POB

Persons on board

POSS

Possible

PPl

Plan position indicator

PPR

Prior permission required

PPSN

Present position

PRI

Primary

PRFG

Aerodrome partially covered by fog

PRKG

Parking

P-RNAV

Precision area navigation

PROB

Probability

PROC

Procedure

PROV

Provisional

PS

Plus

PSG

Passing

PSN

Position

PSR

Primary surveillance radar

PTN

Procedure turn

PWR

Power

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 [Alkuun]

  QDM

Magnetic heading (zero wind)

QDR

Magnetic bearing

QFE

Atmospheric pressure at aerodrome elevation (or at runway threshold)

QFU

Magnetic orientation of runway

QNH

Altimeter sub-scale setting to obtain elevation when on the ground

QTE

True bearing

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 [Alkuun]

  R

Red

R…

Restricted area (followed by identification)

R

Right (runway identification)

RA

Rain

RAC

Rules of fhe air and air traffic services

RAD

Route availability document

RAG

Ragged

RAG

Runway arresting gear

RAIM

Receiver autonomous integrity monitoring

RASC

Regional AIS system centre

RB

Rescue boat

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)

RDH

Reference datum height (for ILS)

RDL

Radial

RDO

Radio

RE…

Recent (used to qualify weather phenomena, 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

RESA

Runway end safety area

RG

Range (lights)

RHC

Right-hand circuit

RIF

Reclearance in flight

RITE

Right (direction of turn)

RLLS

Runway lead-in lighting system

RMAC

Radar minimum altitude chart

RMK

Remark

RNAV

(to be pronounced "AR-NAV") Area navigation

RNP

Required navigation performance

ROBEX

Regional OPMET bulletin exchange (scheme)

ROC

Rate of climb

ROD

Rate of descent

ROFOR

Route forecast (in aeronautical meteorological code)

RPI

Radar position indication

RPL

Repetitive flight plan

RPLC

Replace or replaced

RPS

Radar position symbol

RQMNTS

Requirements

RQP

Request flight plan (message type designator)

RQS

Request supplementary flight plan (message type designator)

RRA

(or RRB, RRC… etc., in sequence) Delayed meteorological message (message 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, helicopter

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

RVSM

Reduced vertical separation minimum (1000 ft) between FL290 and FL410

RWY

Runway

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 [Alkuun]

  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

SBAS

Satellite-based augmentation system

SC

Stratocumulus

SCT

Scattered

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 quality icing and turbulence reports)

SFC

Surface

SG

Snow grains

SGL

Signal

SH…

Showers (followed by RA, SN, PE, GR, GS 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 (chart)

SIGMET

Information concerning en-route weather phenomena which may affect the safety of aircrafl operations

SIGWX

Significant weather

SIMUL

Simultaneous or simultaneously

SKC

Sky clear

SKED

Schedule or scheduled

SLP

Speed limiting point

SLW

Slow

SMC

Surface movement control

SMR

Surface movement radar

SN

Snow

SNOWTAM

A special series NOTAM notifying the presence or removal of hazardous conditions due to snow, ice, slush or standing water associated with snow, slush and ice on the movement area, by means of a specific format.

SPECI

Aviation selected special weather report (in aeronautical meteorological code)

SPECIAL

Special meteorological report (in abbreviated plain language)

SPL

Supplementary flight pian (message type designator)

SPOC

SAR point of contact

SPOT

Spot wind

SQ

Squall

SQL

Squall line

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

Sandsstorm

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 (chart)

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 (AlP Supplement)

SUPPS

Regional supplementary procedures

SVC

Service message

SVCBL

Serviceable

SW

South-west

SWB

South-westbound

SWY

Stopway

S3

3-hourly synoptic surface chart

S6

6-hourly synoptic surface chart

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 [Alkuun]

  T

Temperature

TA

Transition altitude

TACAN

UHF tactical air navigation aid

TAF

Aerodrome forecast

TAIL

Taliwind

TAR

Terminal area surveillance radar

TAS

True airspeed

TAX

Taxiing or taxi

TBD

To be developed

TC

Tropical cyclone

TCH

Treshold crossing height

TCU

Towering cumulus

TDO

Tornado

TDZ

Touchdown zone

TECR

Technical reason

TEL

Telephone

TEMPO

Temporary or temporarily

TFC

Traffic

TGL

Touch-and-go landing

TGL

Temporary Guidance Leaflet

TGS

Taxiing guidance system

THR

Threshold

THRU

Through

THU

Thursday

TIBA

Traffic information broadcast by aircraft

TIL

Until

TILS

Tactical instrument landing system (MIL)

TIP

Until past…(place)

TIS

Traffic information system

TKOF

Takeoff

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)

TODA

Take-off distance available

TODAH

Take-off distance available, helicopter

TOP

Cloud top

TORA

Take-off run available

TP

Turning point

TPC

Terrain profile chart

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)

TS…

Thunderstorm (followed by RA, SN, PE, GR, GS or combinations thereof, e.g. TSRASN = thunderstorm with rain and snow)

TSA

Temporary segregated area

TT

Teletypewriter

TUE

Tuesday

TURB

Turbulence

T-VASIS

T visual approach slope indicator system

TWR

Aerodrome control tower or aerodrome control

TWY

Taxiway

TYP

Type of aircraft

TYPH

Typhoon

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 [Alkuun]

  U

Upward (tendency in RVR during previous 10 minutes)

UAC

Upper area control centre

UAR

Upper air route

UAV

Unmanned aerial vehicle

UDF

Ultra high frequency direction-finding station

UFN

Until further notice

UHF

Ultra high frequency (300 to 3 000 MHZ)

UIC

Upper information centre

UIR

Upper flight information region

ULR

Ultra long range

UNL

Unlimited

UNREL

Unreliable

U/S

Unserviceable

UTA

Upper control area

UTC

Co-ordinated Universal Time

UUP

Updated airspace use plan

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 [Alkuun]

  VA

Volcanic ash

VAC

Visual approach chart

VAL

In valleys

VAL

Visual approach chart (to be gradually replaced by VAC)

VAN

Runway control van

VAR

Magnetic variation

VASIS

Visual approach slope indicator system

VC

Vicinity of the aerodrome (followed by FG, FC, SH, PO, BLDU, BLSA or BLSN, e.g. VC FG = vicinity fog)

VCY

Vicinity

VDF

Very high frequency direction-finding station

VER

Vertical

VFR

Visual flight rules

VHF

Very high frequency (30 to 300 MHZ)

VIP

Very important person

VIS

Visibility

VLF

Very low frequency (3 to 30 kHz)

VLR

Very long range

VMC

Visual meteorological conditions

VOL

Volume (followed by I,II...)

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

V7D

Emission of pulses

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 [Alkuun]

  W

West or western longitude

W

White

WAC

World Aeronautical Chart-ICAO 1:1 000000

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

WGS-84

World geodetic system - 1984

WI

Within

WID

Width

WIE

With immediate effect or effectve immediately

WIP

Work in progress

WKN

Weaken or weakening

WNW

West north west

WO

Without

WPT

Waypoint

WRNG

Warning

WS

Windshear

WSPD

Wind speed

WSW

West south west

WT

Weight

WTSPT

Waterspout

WWW

World wide web

WX

Weather

WXR

Weather radar

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 [Alkuun]

  X

Cross

XBAR

Crossbar (of approach lighting system)

XNG

Crossing

XS

Atmospherics

  Y

Yellow

YCZ

Yellow caution zone (runway lighting)

YR

Your

  Z

Co-ordinated Universal Time (in meteorological messages)

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 [Alkuun]