Rising

A term derived from the shape of a ship's bottom in general, which gradually narrows or becomes sharper towards the stem and the stern-post. On this account it is that the floor, towards the extremities of the ship, is raised or lifted above the keel; otherwise, the ship would be so very acute as not to be provided from timber with sufficient strength in the middle, or cutting-down. The floor timbers forward and abaft, with regard to their general form and arrangement, are therefore gradually lifted or raised upon a solid body of wood called the dead or rising wood, which must, of course, have more or less rising as the body of the ship assumes more or less fullness or capacity. (See Dead-Rising.)

Rising of Boats is a narrow strake of board fastened within side to support the thwarts.