A wale is one of the strakes of wooden planking that forms the outer skin of the hull of a ship, but substantially thicker than the other strakes. It provides extra stiffening and strength to the hull. It was a common feature of heavy wooden ship construction, particularly from medieval times to the early years of the 19th century.
They were about the same width as the hull planking, but were thicker, with the result that they projected 3-4ins beyond the planking on 16th and 17th-century ships, and 2-3ins on 18 and 19-century vessels. Their top and bottom edges were very slightly rounded off.