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 designs that are simple to build, rugged and seaworthy.. Begin your search for wooden boat plans here! thousands of builders have assembled chesapeake light craft boats from scratch with these plans. you might already have a stash of marine grade plywood and epoxy, or it might just be your preference to build the whole boat from the keel up.. Find and save ideas about wooden boat plans on pinterest. see more ideas about wooden boat building, wood boat plans and diy canoe projects..