W | West or western longitude |
W | White |
WAC | World Aeronautical Chart − ICAO 1 : 1 000 000 (followed by name/title) |
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 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 |
WSPD | Wind speed |
WSW | West south west |
WT | Weight |
WTSPT | Waterspout |
WX | Weather |
WXR | Weather radar |