A missing World War II submarine was found off the coast of Japan after explorers discovered a 75-year-old error in the coordinates of where the sub was, the expedition team said. The USS Grayback sank in February 1944 after Japanese forces attacked it as the sub was on a mission in the East China Sea.

What was the most successful US submarine ww2?

How the most successful submarine in US Navy history ended up sinking itself. By October 1944, the USS Tang had racked up the best record of any US Navy submarine, sinking Japanese ships across the Pacific.

What caused the Grayback to sink?

On 26 February 1944, Grayback suffered damage when land-based Japanese naval aircraft attacked her in the East China Sea, 25°47'N, 128°45'E, but sank the naval transport Ceylon Maru the next day [27 February].