Originally launched on October 21, 1950 at Krasnoye Sormovo Factory in Gorky, the S-80 was a Whiskey Class submarine, and was later overhauled between 1957 and 1959. On January 27, 1961, the S-80 was sailing through the Barents Sea (a portion of the Arctic Ocean between the Svalbard Islands and the Arkhangelsk Oblast, directly north of Murmansk). At about 1:27am, the S-80 dropped below snorkel depth, but a mechanical fault caused portions of the submarine to flood.
Alarm spread, but not as quickly as the water and the cascading mechanical faults. In the end, a total of 68 men – the complete complement of officers and crew – lost their lives in the sinking. The S-80 and the men aboard it were not found for seven and a half years.