W  (.1.).Watt.. 
(.2.).West 
WAAS  Wide.Area.Augmentation.System.(Method.of. 
Differential.GPS) 
WAD  Wide.Area.Differential 
WADGNSS  Wide.Area.Differential.Global.Navigation.Satellite. 
System 
WAFS  World.Area.Forecast.System 
WAI  Wing.Anti-Ice 
WAN  Wide.Area.Network 
WARC-9  World.Administrative.Radio.Conference.(1992) 
WARC-MOB  World.Administrative.Radio.Conference.for.the. 
Mobile.Service 
WAT  Weight.and.Temperature 
WATRS  West.Atlantic.Route.Structure 
Waypoint  A position along a route of flight. Navigation 
aid,.airport,.or.geographic.point.a.pilot.uses.to. 
navigate.the.aircraft. 
WBC  Weight.and.Balance.Computer 
WBS  Work.Breakdown.Structure 
WCP  WXR.Control.Panels 
WD  Wind.Direction 
WES  Warning.Electronic.System 
WEU  Warning.Electronic.Unit 
WFA  WXR.Flat.Plate.Antenna 
WGS  World.Geodetic.System 
WGS-  World.Geodetic.Survey.of.1972 
WGS-4  World.Geodetic.System.1984 
Whisper Shout  A sequence of ATCRBS interrogations and 
suppressions.of.varying.power.levels.transmitted. 
by TCAS equipment to reduce severity of 
synchronous.interference.and.multipath. 
problems. 

WING CHORD  An.imaginary.line.joining.the.leading.and.trailing. 
edges.of.the.wing. 
WINDMG  Wind.Magnitude 
WINDR  Wind.Direction 
WIP  Work.In.Progress 
WLAN  Wireless.Local.Area.Network 
WLD  Welded.Pipe.and.Tube 
WLM  Wireless.LAN.Manager 
WMA  WXR.Antenna.Pedestal.and.WXR.Waveguide. 
Adapter 
WMI  WXR.Indicator.Mount 
WMO  World Meteorological Organization 
W/MOD  With Modification of Vertical Profile 
WMS  Wide-area.Master.Station 
WMSC  Weather.Message.Switching.Center 
WMSCR  Weather.Message.Switching.Center.Replacement 
WMT  WXR.Mount 
WN  Week.Number 
WORD  Grouping.of.bits..Size.of.group.varies.from. 
microprocessor.to.microprocessor. 
WOW  Weight On Wheels 
WP  Working.Paper 
WPT  Waypoint. A defined geographic point used as a 
reference.for.navigation. 
WPR  Waypoint.Position.Report