rudder—A flat, hinged apparatus hung at the stern of a ship, by the movement of which the ship is steered.
running lights—The lights that a ship is required by law to carry at night while under way.
sail—A sheet of canvas or other material which, when spread to the wind, makes possible the movement of a vessel. For various sails in use see illustration, page [213].
schooner—A fore-and-aft rigged vessel with two or more masts, the foremost of which is the foremast. See page [201].
scout cruiser—A very fast and lightly armoured modern warship smaller than a battle cruiser but larger than a destroyer, used for scouting.
scow—A large flat-bottomed boat without power and of many uses.
screw propeller—See PROPELLER.
scuppers—Openings in the bulwarks of a ship to carry off any water that may get on the deck.
seam—The space between two planks in the covering of a vessel. It is in the seam that the calking is placed.
seamanship—The art of handling ships.