"torpedo launcher" . "tt." . "torpedo hoist" . "torpedo tubes" . "Torpedo tube" . "tubes" . . "torpedo tube" . . . "tt" . "TT" . "Torpedo tube" . "mounts" . "torpedo-tube launchers" . . . . "torpedo launching devices" . "lightweight torpedo tubes" . "torpedo launchers" . . "triple-torpedo tubes" . . "torpedo" . "torpedo tube launchers" . "torpedo launching system" . "tube" .