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. These free plans for wood dock sections are ideal for residential or light commercial application. we have all the hardware you need to build it right the. The little island trader 30 is based on a traditional style cargo boat ideally suited to cruising on a budget. she can be built in wood, aluminum.