SUBROC could be launched from a 21-inch submarine torpedo tube. The diagram on the right illustrates the operation of a submarine torpedo tube. The diagram is somewhat simplified but does show the working of a submarine torpedo launch. "Moltke" was damaged by a British submarine torpedo before reaching port. The Mk-48 torpedo is designed to be launched from submarine torpedo tubes. The Japanese began the war with an advanced submarine torpedo design, the Type 95. The missile can be launched from vertical launching systems, and possibly from submarine torpedo tubes. Submarine torpedo launched from IJN I-175 SW off Butaritari (Makin). Thus a submarine torpedo tube operates on the principle of an airlock. The submarine torpedo boat also attacked "Wabash" on April 18, 1864.