Authorised bruce roberts international yacht design web site operated by bruce roberts-goodson the designer, plans and kits for sailboats, powerboats for building in steel, fiberglass or wood epoxy, power cats. Awol by john welsford loa 5.05m – 16ft 5in beam 1.910m – 6ft 4in —– draft (cb up)0. 160m – 6-1/4in draft (cb dn) 1.2m – 4ft. A smaller plywood version of the english surfboat. among small boat enthusiasts the yorkshire coble is legendary for its seaworthiness and unique styling..