Wind Sock

Wind Sock (also windsock or wind cone) is a conical fabric tube mounted on a swiveling pole at an airport that provides a visual indication of wind direction and approximate speed. It is one of the simplest yet most useful tools at any aerodrome.

• Points in the direction the wind is blowing toward (downwind)
• Fully extended: wind approximately 15 knots or more
• At 5 knots, roughly one-quarter extended
• Illuminated at night at airports with night operations
• Located near runway thresholds and in the traffic pattern
• Required equipment at all aerodromes per ICAO Annex 14