U.S. DEPARTMENT OF TRANSPORTATION
FEDERAL AVIATION ADMINISTRATION
Air Traffic Organization Policy

ORDER
JO 7340.2E
Effective Date:
July 24, 2014
 
     

Subject:  Contractions

[Back to Section 1. Decode]

W

Contraction

Definition

Usage

W

warm (air mass)

NWS

W

west or western longitude

ICAO

W

White

ICAO

WA

AIRMET

NWS

WAAS

Wide Area Augmentation System

ATC

WAC

world aeronautical chart

GEN

WAC

World aeronautical chart ­ ICAO 1:1 000 000(followed by name/title)

ICAO

WAFC

world area forecast center

ICAO

WAIOP

will accept, if offered, the position

GEN

WB

Westbound

ICAO

WBAR

wing bar lights

ICAO

WBND

Westbound

ATC

WBRBN

will be reported by NOTAM

GEN

WBRH

Weather Bureau Regional Headquarters

GEN

WBTS

Whereabouts

GEN

WCLC

Watch check list completed

GEN

WDC­1

World Data Centers in Western Europe

NWS

WDC­2

World Data Centers throughout rest of world

NWS

WDI

wind direction indicator

ICAO

WDLY

Widely

NWS

WDSPR

Widespread

GEN

WDSPRD

Widespread

NWS

WEA

Weather

NWS

WEF

With effect from, or effective from

ICAO

WFO

Weather Forecast Office

GEN

WFP

Warm front passage

NWS

WG

Working group

GEN

WGS

World Geodetic System

ATC

WGS­84

World geodetic system 1984

ICAO

WI

within

GEN

WIBIS

will be issued

GEN

WICA

while in control area

ATC

WICZ

while in control zone

ATC

WID

width

ICAO

WIE

with immediate effect or effective immediately

ICAO

WILCO

will comply

GEN

WINT

winter

NWS

WINTEM

forecast upper wind and temperature for aviation

ICAO

WIP

work in progress

GEN

WK

weak

GEN

WKDAY

weekday

GEN

WKEND

weekend

GEN

WKN

weaken

GEN

WL

will

GEN

WLAV

will advise

GEN

WMO

World Meteorological Organization

GEN

WMSC

Weather Message Switching Center

GEN

WND

wind

NWS

WNW

west­north west

ICAO

WNWRN

west­northwestern (weather reports only)

NWS

WNWWD

west­northwestward (weather reports only)

NWS

WO

Washington Office

GEN

WO

without

GEN

WP

waypoint

GEN

WPLTO

western plateau

NWS

WPM

words per minute

GEN

WPRT

waypoint report

ATC

WPT

waypoint

ICAO

WR

wet runway

NWS

WRC

well to right of course

ATC

WRM

warm

NWS

WRMFNT

warm front

NWS

WRNG

warning

NWS

WRS

worse

GEN

WS

SIGMET

NWS

WS

weak signals

ATC

WS

wind shear

ICAO

WSCMO

Weather Service Contract Meteorological Observatory

GEN

WSHFT

wind shift

NWS

WSO

Weather Service Office

GEN

WSOM

weather service operations manual

NWS

WSP

weather system processor (replacement for LLWAS)

GEN

WSR

wet snow on runway

NWS

WSSF

National Weather Service Support Facility

GEN

WSSU

National Weather Service Support Unit

GEN

WSTCH

wasatch range

NWS

WSW

west­south west

ICAO

WSWRN

west­southwestern (weather reports only)

NWS

WSWWD

west­southwestward (weather reports only)

NWS

WT

Weight

GEN

WTR

Water

NWS

WTR

well to right

ATC

WTSPT

waterspout

NWS

WU

Western Union Telegraph Company

GEN

WV

Wave

NWS

WV

wind at altitude (PIREP only)

ATC

WW

severe weather forecast

NWS

WWW

World wide web

ICAO

WX

Weather

ICAO

WX

weather at altitude (PIREP only)

ATC

WXCON

weather reconnaissance flight pilot report

NWS

WYAIO

will you accept, if offered, the position of

GEN

 

 

 

Return to Air Traffic Publications Library Return to Table of Contents