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. 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. If you need help building your boat, you’ve come to the right place! search for boat trailer plans and boat plans, all available for digital download..