Welcome to spira international home-built boat plans. spira international offers a wide variety of different power, rowing, and sailing skiffs, dories, and other boat. Boden boat plans professionally designed ocean proven. thousands of boden designs have been built from the stock plans available. many have completed world circum. Grady-white offshore 24 by jack hornor revised by boatus editors in october 2012 photo by: boat max usa. grady-white boats was founded in 1958 by partners glen grady.