In 1956, the "A-Division-Catamaran-Class" was founded as a free construction class by the former "International Yacht Racing Union" in England and still belongs to one of the oldest and most active catamaran classes in the world. Due to a minimum of construction rules such as length, width and sail area it has been possible for the numerous designers to develop a boat outstanding performance. This led to the fact that the A-Cat as a multihull has become a pure high-tech boat and is now days considered as the formula one among all the sailing boats. Modern materials such as carbon and kevlar are being used for the mass production of hulls and masts, a potential of development which has been recognized and approved by modern industries, whereas others still satisfy with glassfibre and aluminium masts. The A-Cat has proved in the international scene how popular it is as the European and World Championships are frequently followed by the most famous sailors of the world. However, it’s always taken a pure A-Class sailor to win the Championships. This shows about the high level of performance within the class is and it leads us to amazing numbers of entries for such Championships. The International A-Class Rules allows 80 to 100 entries which means for each country to sail pre-selection events.