The first Japanese WW2 aircraft-carrier wrecks ever to be found have been located in the depths of the Pacific Ocean. They were discovered through sonar scanning by the US Vulcan team aboard their research vessel Petrel and then explored – though their ROV was badly damaged in the process.
The carriers sank during the pivotal 1942 Battle of Midway, in which the Japanese fleet suffered devastating losses. On 16 October the Vulcan team found the remains of the aircraft-carrier IJN Kaga at a depth of 5.4km. The carrier had been part of the fleet that had attacked Pearl Harbor the previous year.
The carrier had been scuttled by two torpedoes from its escort destroyer Hagikaze, after sustaining irreparable damage in a 4 June attack by some 30 US dive-bombers, and being struck by two torpedoes from USS Nautilus. A total of 814 of Kaga’s crew died during the battle.
Three other Japanese aircraft-carriers that had taken part in the Pearl Harbor attack, Akagi, Soryu and Hiryu, were sunk during the Battle of Midway.
The Petrel team went on to locate what they reported was the wreck of the Akagi on 19 October, but because their ROV had “suffered damage that was beyond our ability to repair on site” during its dive on the Kaga, they were unable to obtain video or photographs of this find.
The discoveries came after several weeks spent surveying within the Papahanaumokuakea Marine National Monument area of the Pacific, about 1400 miles north-west of Hawaii.