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wind direction indicator

avia., canad. manche à vent
cienc., tec. indicateur de direction du vent
transp. indicateur de direction de vent
 Inglés tesauro
Wind Direction Indicator
meteorol., abrev. WDI
wind direction indicator
avia., canad. 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; An actuated device for indicating visually to aircraft the direction of surface wind