Windsock will hang 30° below the horizon when winds are at how many knots?

Windsock will hang 30° below the horizon when winds are at how many knots?

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

Answer: (A)

Visual wind-speed cue: a windsock’s angle relative to the horizon is a quick guide to wind strength. As wind increases, the windsock tilts up from hanging downward toward the horizon and beyond. A 30° angle below the horizon corresponds to a light breeze of about 6 knots. So the windsock at 30° down indicates roughly 6 knots. The other descriptors aren’t speeds: fluttering implies gusty or insufficient extension, and external isn’t a wind-speed measure.

Visual wind-speed cue: a windsock’s angle relative to the horizon is a quick guide to wind strength. As wind increases, the windsock tilts up from hanging downward toward the horizon and beyond. A 30° angle below the horizon corresponds to a light breeze of about 6 knots. So the windsock at 30° down indicates roughly 6 knots. The other descriptors aren’t speeds: fluttering implies gusty or insufficient extension, and external isn’t a wind-speed measure.