Spira international wooden boat plans. following are the stock plans available for the various types of boats, separated into the different categories.. These aluminum boats are designed for a variety of specific purposes. some types include seine skiffs, harbor work boats, commercial crab boats, and patrol boats.. Boatplans.dk – online free and inexpensive boat plans for canoes, small boats, sail boats, motorboats and powerboats. download boat plans right away. – boatplans.dk.