Hi;

 I got this crazy thought last night .A sheet of foam .Some walnut shaped cut-outs .What is it? How about this .Do you know what a Coracle is ? A walnut shaped boat some think was made of wood saplings bent to shape and then covered with Treated Leather .Similar to a Cog .

 Now take Five walnut shells and sand the inside and outside smooth .Add a  mast in the center and decks  to the small pointy end and the rounded rear .Steering oar on the Starboard side .Now some 1/160 sailors from sailing ship models or 1/350 ? 

 There you have a dio of a small fleet from Scotland before Columbus . About one hundred years before .Think Gunn . Stones were found in western Massachussets that depict such a vessel and the shield of the Gunn Clan .