daTextBox=The Deck Generally flat, higher performance boards will be domed to decrease volume and create a tapered (thinner) rail on the edge. Rails Thicker rails provide stability. Tapered rails allow you to sink the rail into the water when turning for better performance. Volume More volume means more buoyancy, but how the volume is distributed defines the stability of a board. High volume boards with significant surface area are the most stable boards. The Tail When riding waves, SUP surfers will move to the tail to pivot and turn. The thickness, shape and edge on the tail define how easy the board turns. History | History2 | ABC's | ABC's 2 | ABC's 3 | ABC's 4 | Choosing| Choosing 2| Choosing 3| Choosing4