Although the first SHARK was built of plywood. But when designer/builder George Hinterhoeller started building them of fiberglass he couldn't keep up with demand and the design became an international success. Since then, more than 2,500 Sharks have been built. Besides North America, Sharks sail the lakes of Austria, Switzerland, Germany and the waters of the Swedish archipelago. There have been a number of cosmetic changes to the design but, by in large, one-design standards have been maintained. 'Sharkscan' has been the class newsletter.