Whether you dream of spending time fly-fishing, snorkeling or just rekindling your passion for nature, this 12′ garvey flex boat offers you the opportunity to. We have dinghy boat plans for dinghies up to 12′, most of which can be used with oars, sail, or small outboards. find dinghy sailboat plans at bateau!. A simple to build, versatile classic flat bottom garvey, jon boat, duck boat. learn how to build a jon boat with our jon boat plans. these plans are available as a.