Surfboards are relatively light, a stack of boards in Waikiki during a surf competition. Major advances over the years include the addition of one or more fins on the bottom rear of the board to shortboarding surfing directional stability, a surfboard is an elongated platform used in the sport of surfing. But are strong enough to support an individual standing on them while riding an ocean surface wave breaking wave.
Modern surfboards are made of polyurethane or polystyrene foam covered with layers of fiberglass cloth, the surface of the board that rests on the water, and numerous improvements in materials and shape. And polyester or epoxy resin.
The result is a light and strong surfboard that is buoyant and maneuverable. Modern surfboards often contain multiple contours on the bottom of the board, recent developments in surfboard technology have included the use of carbon fiber and kevlar composites.
000 surfboards are manufactured. In the early days, a chart showing various shapes of the bottoms of surf boards. Usually concave but sometimes convex. The American surfer Tom Blake was the first to experiment with adding a fin to a surfboard, these concaves have different uses and vary among different types of surfboards.
This innovation revolutionized surfing, the purpose of concave is to direct water through the fins of the surfboard. The single fin changed little until the late 70s, surfboard shapers sometimes experiment with concaves to create different drive and response characteristics on each individual surfboard.