 Cape Cod Knockabout

A Cape Cod Knockabout, or Knockabout, is a one-design class of sail boat sailed primarily out of Upper Cape harbors in Massachusetts, United States.Cape Cod Knockabouts were designed by Charles S. Gurney and were popular in Massachusetts between the 1940s and 1970s, with fleets of 50-60 boats available to take part in annual regattas.