A sailboard will move depending on the wind conditions and the skill or intentions of the surfer, in two entirely different manners with two different displacements as given below:  These conditions arise when there are light winds (less than approximately 12 knots), the  board moves through the water – much like a sailing boat does – using an extendable center  board and fin for stability and lateral resistance.  These conditions arise when there are strong winds (more than approximately, 12 knots).  Typically, at this point a harness is worn in order to use the body to counter the force in the  sail more efficiently. 15   Fall Recovery : When the winds are too strong to pull the sail out of the water while  standing on the board, the surfer has to "water start" the board. Occasionally, a surfer  becomes unable to water start, if the wind has dropped and the sail becomes too small  to lift the surfer out of the water.   Directional Control . It is mainly achieved by putting the surfer’s weight pressure on  either the left or the right edge of the board. Jibing is done at full speed and pressure  is released from the sail as the board speed turns downwind, allowing for the sail to  be jibed.   Fall Recovery . It is achieved when you climb on the board, grab the pulling rope,  make sure the mast foot is between two feet, pull the sail about one-third out of the  water, and let the wind turn the sail-board combination.   Directional Control . It is achieved by moving the rig either forward (turning away  from the wind) or aft (turning towards the wind).  WindsurfingPerformanceUnder Sailing Conditions  WindsurfingPerformanceUnder Planning Conditions  Windsurfing  $_{7.}$ Windsurfing – Performance Techniques