MARBLEHEAD, Mass. (September 6): After months of planning, over 45 Viper 640s have returned to the class’s unofficial home in Marblehead, Massachusetts to compete in the fleet’s largest North American Championship to date. Teams are signed up from five countries and eleven states and provinces, including two teams from Western Australia who will be chartering boats for the week. Racing begins on Thursday, September 6 and concludes on Sunday, September 9. Thursday’s forecast calls for light air, which may build late in the afternoon.  READ MORE.