W

WKSP Transmission Centres Workshop
WLA WorkLoad Assessment
WM Working Memory *
WMB Window Management Button
WMO World Meteorological Organisation
WOC Wing Operations Centre
WOD Word Of the Day
WORM Write Once, Read Many
WP Way-Point *
WP Work Package *
WP Work Programme
WP Working Paper
WP Working Position
WPD Work Programme Document
WPL Work Package Leaders (EATCHIP)
WPM Words Per Minute
WPn First waypoint in the next sector
WPP Working Position Processor
WPs Working Positions
WPx Next waypoint on the flight plan
WRC World Radio-communications Conferences *
WS Work Station
WS Watch Supervisor
WSC West Sector Co-ordinator
WTC Wake Turbulence Category
WWW World Wide Web (INTERNET)
WX Weather
WXMS Weather Mapping System
WYSIWYG What You See Is What You Get
X
X.25 Packet Switched Data Network *
X25 Standard protocol in telecommunications
XAP Crossing Alternate Proposal Message
XASM Cancel Assume
XASP Extended AIRCOM Service Processor
XBRIGHT Cancel highlighting
XCM Crossing Request Cancelation Message (OLDI)
XCONF Delete CONFlict
XCOORD Cancel Co-ordination
XCOP Exit Co-ordination Point
XCOR Cancel Correlation
XECM Cancel Executive Controller Message
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X

XEU European Currency Unit (ECU)
XEXPLT Cancel Extrapolation
XFDM Cancel FDM
XFL Exit Flight Level * (from a sector or volume of airspace)
XFRQ Cancel Frequency message
XGEO Cancel GEO
XHOLD Cancel Hold
XIFL Cancel Intermediate Flight Level
XIN Military Crossing Intention Notifi-cation Message