Baker boat works – plans . the boat plans (no kits available) are grouped into five building categories: easy, basic intermediate, intermediate, intermediate-advanced. Free plans: absolutely free plans (links to free online boat plans) ariawood boat works (plywood punts, jonboats and one-sheet boats) architectura navalis mercatoria. Iain oughtred. i don’t think that iain needs any introduction on these pages, but if you haven’t heard of him before, his small boat designs are regarded as being.