PNS Hangor (S131)
PNS Hangor (nickname "The Shark") was a Daphné class submarine that served in the Pakistan Navy from 1970 to 2006, built by France she was a diesel-electric submarine. She earned renown when, in the 1971 Indo-Pakistani War, she sank the Indian Navy's anti-submarine frigate INS Khukri with two homing torpedoes. This was the first submarine kill since World War II, and it would remain the only one until a Royal Navy nuclear submarine, HMS Conqueror, sank an Argentine cruiser, General Belgrano, during the Falklands War.
The sinking inflicted the largest number of casualties on the Indian Navy by the Pakistan vessel during the war which resulted in the loss of 194 Indian Sailors, on the night of December 8/9, 1971.