View tunnel hull boat plans for the seabright 21, a shallow draft, atkins style tunnel boat. see our plywood version of this tunnel boat design at bateau!. Download our flat bottom boat design for the extreme flats 20, a light weight, quiet hull with low freeboard. buy flats boat plans and more at bateau.com!. Visit http://www.boatplansideas.com to find useful information on boat plans if you want to start to build a boat. find articles on wooden boat, classic.