A secret collision between British and Soviet submarines could've turned out much worse

A Soviet Delta III-class nuclear-powered ballistic-missile submarine, seen in August 1982.
US Navy
On May 23, 1981 a Soviet submarine and a British submarine collided in the Arctic.
The accident heavily damaged both submarines, but it could've been fatal.
Except for a few accounts by sailors involved, the incident has been kept quiet for 40 years.
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On May 23, 1981 the Soviet submarine K-211 Petropavlovsk cruised quietly at 9 knots, 150 feet below the