Windsurfing        
              

 
Is a surface water sport using a windsurf board, also commonly called a sailboard, usually two to five meters long and powered by wind pushing a single sail. The rig is connected to the board by a free-rotating flexible joint called the Universal Joint (U-Joint). Unlike a rudder-steered sailboat, a windsurfer is steered by the tilting and rotating of the mast and sail as well as tilting and carving the board.

 Windsurfing includes speed sailing, slalom, course racing, wave sailing, superX, and freestyle as distinct disciplines.

Though windsurfing is possible in winds from near 0 to 50 knots, the ideal planing conditions for most recreational sailors is 5-15 knots, with lighter winds resulting in displacement mode sailing.