I didn't explain clearly hoe the simulator works for thse wo don't know. It isn't just a platform; it is a dynamic simulator...a type of turntable. A board is strapped to it. The student can get the sensation of what happens when moving the centre of effort with the sail easily under close instruction.The device allows the student to gain an immediate understanding of the way a sailboard functions. It also negates the need to tie up a board that is usually used as a "corpse" simulator with the fin removed to land demonstrate. It frees up a board which could otherwise be on the water. It also reduces the risk of damage to the board using the "corpse" method.