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| 風向指示器 (fūkō-shijiki) | |||
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| 風向指示器 (fūkō-shijiki) River and Water Resources Glossary (Infrastructure Development Institute Japan) | |||
| Anglais glossaire | |||
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| WDI | |||
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| 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 | |||
