By Kyle Mizokami
In 1982, fresh off a combat patrol in the Falkland Islands, a British submarine committed a brazen act of theft—it stole a secret sonar array right out from under the nose of a Soviet Navy ship. The role of HMS Conqueror in Operation Barmaid points to a larger world of no-holds-barred undersea cloak and dagger warfare during the Cold War.
HMS Conqueror was a Churchill-class nuclear-powered attack submarine and one of the most powerful ships in the Royal Navy in the 1980s.
http://www.popularmechanics.com/military/navy-ships/a28794/1982-uk-sub-stole-soviet-sonar-device/
