They are 15,000 feet below the waves.
The Soviet Navy (which did not have much interest in the strategic mission at that point) reconfigured the 627 class for a more conventional anti-ship role. Despite their noisiness, the Novembers had the range to threaten NATO surface vessels, especially transport convoys. A small number of nuclear torpedoes (configured with smaller warheads compatible with conventional torpedoes) could wreak havoc on such a convoy, despite the likely loss of the sub to any surviving escorts. The 627s were never regarded as particularly effective sub hunters, in part because they were louder than any foreign contemporaries, and in part because of deficient sonar technology.
The Bay of Biscay is one of the world’s great submarine graveyards. In late World War II, British and American aircraft sank nearly seventy German U-boats in the Bay, which joined a handful of Allied and German subs sunk in the region during World War I. On April 12, 1970, a Soviet submarine found the same resting place. Unlike the others, however, K-8 was propelled by two nuclear reactors, and carried four torpedoes tipped by nuclear warheads.
Recommended: The World’s Most Secretive Nuclear Weapons Program.
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The Novembers (627):