Super Submarine

Japanese super-submarine named I-400 which was lost since 1946 give evidence of its existence. A large similar looking submarine has been located at the southwest coast of Oahu under 2,300 feet of water. It was believed that this submarine was the largest and the most advanced piece of technology of its time. Another striking feature was that this submarine could go onto circling one and a half rounds of earth and won’t demand to refuel. This submarine was under the U.S custody after the end of World War II.