. "torpedo tube" . "Mark 15 torpedo" . "21 inch (533 mm)" . . . . "21 in (53 cm)" . . . "Mark 15" . . "21-inch (533 mm) Mk15" . "torpedoes" . "21 in.(53 cm)" . "Mk15" . . "21 in" . "21 in (53 cm)" . "torpedo" . "21-inch torpedo tubes" . . "0.5334" . "Mark 15 torpedo tube" . . . "Mk 15 torpedo" . . "21-inch" . . . . . "21 inch (533 mm) Mk15" . "Mark 15 torpedo" . . . "Mark 15 Torpedo" . "21 inch" .