There must be wind direction indicators for the flight crew to be able to get wind information during approach and take-off. If the heliport is to be used after dark there should be at least one wind direction indicator illuminated.
The mast of the wind direction indicator is made of aluminum alloy and the fabric of the wind sock is made of lightweight, waterproof textile that is flexible and has a long life span.
Meets all the requirements of wind direction indicators according to ICAO.