over the past summer i took sailing lessons and fell in love with it. Physics is involved within it also. You need to umderstand Newtons Laws vectors and wind power. Moving wind has kenetic energy which is caught in the sails and powers the boat to move. Both the forces of wind and the water act on opposite sides of the boat resulting in the direction on the boat. this will cause calcultation the speed of the boat to be differnt than most becasue you need to know both forces of the wind and the water. when the boat moves it creates a wave behind it, when you get faster and faster the wave gets bigger and bigger. Sailing is very difficult becuase you need to understand where the wind is coming from to find the resultant of where the wind will be most efficient in moving the boat.