World War II Japanese mega-submarine discovered off Hawaii
Back in World War 2, the I-400, a class “Sen-Toku” Japanese submarine - one of the largest ever built before nuclear powered submarines- , was sunk by the US Navy. And recently, a team of explorers has found it off the coast of Hawaii. Though while they knew it would be in the relative area, they didn’t expect it to be in such close proximity to the island.
The Sen Toku-class I-401 (伊四百型潜水艦) was once the largest submarine in the world. It was commanded by Lieutenant Commander Nobukiyo Nambu of the Imperial Japanese Navy during World War II. Capable of carrying three two-seat Aichi M6A1 "Seiran" (Mountain Haze) float torpedo bombers, the Sen Tokus were built to launch a surprise air strike against the Panama Canal.