The Harbor Skiff is a round sided boat so unlike flat sided skiffs, her planks are not straight. As the first boat was built her planks were traced, and just to be sure we were right we used these patterns when we built the second boat. They fit like a glove. The trick to using plank patterns is to make sure your setup is right, meaning that the moulds, stem, and transom are made and aligned on the plan. You should do that as a matter of course anyway, and when you do you will be rewarded by not having to spile her planks, because that work has been done for you right on this single page.
This boat is a real load carrier, and with ballast forward will easily handle up to a 9hp outboard. Here's a shot of one built by Hilmark Boats out on Vancouver Island, with the crew that built her testing her out on launching day.
Actually, that was their second trip out. On the first trip, the youngest member of the crew thought a jig would be appropriate...
Four adults in a skiff? Obviously she can handle the load just fine.