Windsock will be horizontal when winds reach at least how many knots?

Windsock will be horizontal when winds reach at least how many knots?

• A. 6
• B. fluttering
• C. 15 kts
• D. 0

Answer: (C)

A windsock shows wind speed by how much it extends. When wind reaches a steady, moderate strength, the sock is pushed straight out and becomes horizontal. This horizontal position is the standard indication used in aviation to show a sufficient wind speed, not calm or gusty motion. The other options describe either no wind, a fluttering motion without a fixed speed, or a wind value too low to fully straighten the sock. So the horizontal windsock corresponds to that recognized wind-threshold condition.

A windsock shows wind speed by how much it extends. When wind reaches a steady, moderate strength, the sock is pushed straight out and becomes horizontal. This horizontal position is the standard indication used in aviation to show a sufficient wind speed, not calm or gusty motion. The other options describe either no wind, a fluttering motion without a fixed speed, or a wind value too low to fully straighten the sock. So the horizontal windsock corresponds to that recognized wind-threshold condition.