Japanese submarine I-201 sunk by a single torpedo from USS Queenfish
Youtube / hw97karbine
The Japanese submarines I-201 were one of the fastest submarine classes that were built in advanced design for high underwater speed for the Imperial Japanese Navy during World War II.
The I-201 was laid down on March 1st 1944 by the Kure Naval Arsenal at Kure, Japan and launched on July 22nd 1944. She was completed and commissioned on February 2nd 1945 as the lead unit of the I-201 class.
However, the war ended before she could see service and would eventually arrive at Pearl Harbor on February 13th 1946 with her sister submarine I-203, where their design was studied by the U.S. Navy.
Under postwar agreements, the Soviet Union demand access to the captured Japanese submarines that would provide the Soviet Navy valuable information about advanced Japanese submarine designs. The U.S. Navy issued orders to sink all captured Japanese submarines.
On May 23rd 1946, the U.S. Navy sank I-201 as a target in tests of the Mark 9 exploder off Pearl Harbor. She sank after the submarine USS Queenfish hit her with a single Mark 18 Mod 2 torpedo. Watch video below.