Examination of a two-man Japanese submarine that was captured during the attack on Pearl Harbor shows that it had no chance to carry out its destructive mission. The craft’s two torpedoes remain in their 18-inch tubes. At the prow is mounted a knifelike guard with which it was intended to cut through the submarine net protecting the American base. The vessel, 41 feet long, with a plating one-quarter-inch thick and a conning tower four and one-half feet high, has a speed of 24 knots. It could be carried aboard a larger vessel and probably launched over the side. The baby sub has a cruising range of 200 miles.