Spitfire - By William D. Jackson. If you're searching for that elusive extra mile an hour to put you ahead of competition with a small margin to spare, Spitfire is the boat for you. She is a step hydro, eligible for racing in sanctioned class B regattas. She'll equal any three point hydro with considerably better riding qualities. Hull rides well in rough water without excessive pounding and has beveled sides for taking turns at wide open speeds without tripping.