Windsurfing is a surface water sport that combines elements of surfing and sailing. It consists of a board usually 2.5 to 3 meters long, with displacements typically between 60 to 250 litres, powered by wind on a sail. The rig is connected to the board by a free-rotating universal joint and consists of a mast, 2-sided boom and sail. The sail area generally ranges from 2.5 m² to 12 m² depending on the conditions, the skill of the sailor, the type of windsurfing being undertaken and the weight of the person wind surfing.