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Terms for subject Aviation (1835 entries)

VOLMET	Specific meteorological information provided to international air traffic
VOR station	A ground-based electronic NAVAID that transmits very high frequency navigation signals 360° in azimuth
VORTAC	Combination of VOR and TACAN
VTOL aircraft	An aircraft capable of vertical climbs and descents and of using very short runways or small areas for takeoff and landing. These aircraft include, but are not limited to, helicopters.
w/l	working line
w/o	Work Order	Zealot­2002
wake turbulence	Turbulent air behind an aircraft caused by any of the following: (a) wing-tip vortices; (b) rotor-tip vortices; (c) jet-engine thrust stream or jet blast; (d) rotor downwash; (e) propwash
warning area	A warning area is airspace of defined dimensions, extending from 3 NM outward from the coast of the United States, that contains activity that may be hazardous to nonparticipating [s/c] aircraft. The purpose of such warning areas is to warn nonparticipating [s/c] pilots of the potential danger. A warning area may be located over domestic or international waters or both.
Warning, Command, Control, and Communications	WC3
way-point	A specified geographical location, defined by longitude and latitude, that is used in the definition of routes and terminal segments and for progress-reporting purposes
waypoint	A specified geographical location, defined by longitude and latitude, that is used in the definition of routes and terminal segments and for progress-reporting purposes
weather advisory	In aviation weather forecast practice, an expression of hazardous weather conditions not predicted in the area forecast, as they affect the operation of air traffic and as prepared by the National Weather Service
weather information	Information supplied to operators and flight crew members that includes upper winds and upper air temperatures, significant en route weather phenomena, meteorological reports, aerodrome forecasts, forecasts for takeoff, landing forecasts, SIGMET and air reports that are available at the meteorological office and that are relevant to the planned flight operations
whiteout	An atmospheric optical phenomenon of snow-covered regions in which the observer appears to be engulfed in a uniformly white glow. Shadows, the horizon, and clouds are not discernible; depth perception and the sense of orientation are lost; and only very dark, nearby objects can be seen. Whiteout occurs over an unbroken snow cover and beneath a uniformly overcast sky when, with the aid of the snowblink effect, the light from the sky is about equal to that from the snow surface. Blowing snow may be an additional cause.
wide area augmentation system	An augmentation system using geostationary satellites to meet en-route and terminal navigation, non-precision approach and precision approach CAT I accuracy, integrity, continuity and availability requirements
wild weasel	A method of hunting SAMs by using your own aircraft as bait
willy pete	A white phosphorus smoke, rocket, grenade, or artillery round used to provide a ground reference
wind cone	An indicator that is in the form of a truncated cone made of fabric and that is not less than 12 ft long and, at the larger end, not less than 3 ft in diameter, so constructed as to give a clear indication of the direction of surface wind and a general indication of wind speed
wind cone	An actuated device for indicating visually to aircraft the direction of surface wind
wind direction indicator	An indicator that is in the form of a truncated cone made of fabric and that is not less than 12 ft long and, at the larger end, not less than 3 ft in diameter, so constructed as to give a clear indication of the direction of surface wind and a general indication of wind speed