A World War II-era Imperial Japanese Navy mega-submarine, the I-400, lost since 1946 when it was intentionally scuttled by U.S. forces after its capture, has been discovered in more than 2,300 feet of water off the southwest coast of O‘ahu. The discovery resolves a decades-old Cold War mystery of just where the lost submarine lay, and recalls a different era as one war ended and a new, undeclared conflict emerged.
Longer than a football field at 400 feet, the I-400 was known as a “Sen-Toku” class submarine—the largest submarine ever built until the introduction of nuclear-powered subs in the 1960s. With a range of 37,500 miles, the I-400 and its sister ship, the I-401, were able to travel one and a half times around the world without refueling, a capability that, to this day, has never been matched by any other diesel-electric submarine.
Oh… wait… sorry…