Refer to figure.
An aerodrome shall be equipped with at least one wind direction indicator, located so as to be visible from aircraft in flight or on the movement area. The indicator should be free from the effects of air disturbances caused by nearby objects. The wind direction indicator should be in the form of a truncated cone of fabric and should have a length of not less than 3.6 meters and a diameter, at the larger end, of not less than 0.9 m.

It should be constructed so that it gives a clear indication of the direction of the surface wind and a general indication of the wind speed.

The colour or colours should be so selected as to make the wind direction indicator clearly visible and understandable from a height of at least 300 m, having regard to background. Where practicable, a single colour, preferably white or orange, should be used.

To further increase the visibility of the position of the wind indicator, a white circle can be marked surrounding the wind direction indicator.