The location of the aft butt joint is being marked so the plank can be cut to length.
The final rivets are being driven home. Rivets are made from copper nails. Nails use a smaller hole than screws for the same holding power. Roves are placed over the clipped ends and then the cut ends are peened over with a pneumatic air hammer. This creates excellent holding power and a very tight structure. Everything must fit tightly together first. When the hull is closed the planks will be planed, sanded and painted. Then the hull will be righted and interior work will begin.