Easy-to-build plans for boats, dories, fishing boats, drift boats, qood boats, wooden boats, plywood boats alumninum boats. [gp21] general purpose 21′ hull, several options to choose from: work boat, tour boat, bass boat, deck boat, and center console, as well as the basic model. plans format 2 instant download. Hull and frames design for ‘hogging’ introduction. usually there is no construction drawing available for old wooden boats. to still be able to get a line plan of the hull and frames down on paper the main dimensions of the boat have to be obtained, even if the boat is usually weakened and deformed..