The A class catamaran is sailed in four continents, resulting in fifteen  national associations sofar  

Australian A class association

 Austrian A class association

 Spanish A class association

 French A class association

 Great Britain A class association

 German A class association

Italian  A class association

 Dutch a class association  

 New Zealand A class association

 Swiss A class association

 Swedish A class association

 United States A class association

            Danish A-class association

            Belgian A-class association

             Brazilian A-class association