| World Aeronautical Chart | WAC |
|---|---|
| weight, altitude, temperature: variables that affect takeoff performance | WAT |
| Weight & Balance | W&B |
| Wind Correction Angle | WCA |
| Wiring Diagram Manual | WDM |
| with effect from | WEF |
| window of circadian low | WOCL |
| weight-off-wheels, indicates aircraft is off ground since lift off | WOFW |
| weight-on-wheels, indicates aircraft is on ground since touch down | WONW |
| wind shear | WS |
| Wake Turbulence Category | WTC |
| weather | Wx |
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