day due to crippling damage. 1941, November 28 - Dutch submarine HNLMS O-21 becomes the only submarine to sink another submarine while they were both surfaced when she sinks German submarine U-95 with a stern torpedo. 1942, June 7 - The I-168 sinks the US aircraft carrier USS Yorktown (CV-5) and the USS Hammonn (DD-214) who was attempting to save the Yorktown from battle damage she had received in the Battle of Midway. 1942, September 15 – Japanese submarine I-19 sinks U.S. aircraft carrier and destroyer and damages battleship with a single salvo. 1942, November 13 - I-26 sinks USS Juneau. The dead includes all five Sullivan brothers. 1943, March 16–19 – The largest North Atlantic U-boat wolfpack attack of the world wars sinks 22 ships from Convoys HX 229/SC 122. 1943, April 29 – May 6 – Convoy ONS 5 is the last major North Atlantic wolfpack attack by surfaced U-boats as escorts demonstrate effective use of radar to sink 6 U-boats in low-visibility conditions. 1943, May 14 – or is the first submarine sunk by a homing torpedo. 1944, November 29 – USS Archer-Fish sinks Japanese aircraft carrier Shinano, the largest vessel of that time. 1943, October 31-November 1 – USS Borie and U-405 engage in a pitched battle ending with Borie ramming the submarine. Both ships are lost. 1945, January 30 – Soviet submarine S-13 sinks the German ship Wilhelm Gustloff, with older and cautious estimates of 6,000 but more recent estimates of more than 9,000 casualties. 1945, February 6 – Royal Navy submarine becomes the only submarine to sink another submarine while they were both submerged when she sinks off Norway. 1945, April 16 – Soviet submarine L-3 sinks the German ship Goya, with 6,000–7,000 casualties. 1945, July 30 - USS Indianapolis is sunk by the Japanese submarine I-58. She suffers the largest loss of life of an American ship. Post-World War II 1971, December 9 – Pakistani PNS Hangor during the 1971 Indo-Pakistani War sinks the Indian frigate . This was the first ship sunk by a submarine since World War II. Hangor also damaged another warship, INS Kirpan. This was the heaviest casualty that the Pakistani Navy inflicted on the Indian Navy in the war. After the attack on Khukri, the Indian Navy ceased its attacks on Karachi and moved the focus of its operations to East Pakistan ports like Chittagong and Cox's Bazaar.