Wind Direction Indicator
Wind Direction Indicator :
(1) 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. Also called: wind cone, wind sleeve, windsock. (2) An actuated device for indicating visually to aircraft the direction of surface wind
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