HMS Swiftsure (S126): Ten Feet Beneath a Soviet Aircraft Carrier

Built at Barrow

HMS Swiftsure was built at the Vickers Armstrongs shipyard in Barrow-in-Furness, ordered on 3 November 1967, laid down on 6 June 1969, launched on 7 September 1971 and commissioned on 17 April 1973 at a cost of £37.1 million, the lead boat of the six-strong Swiftsure class of nuclear fleet submarines.

A Daring Piece of Cold War Espionage

Swiftsure's most remarkable exploit, kept quiet for decades before the BBC documented it in 2013, saw her crew position the submarine directly beneath the Soviet aircraft carrier Kiev, her raised periscope coming within just ten feet of the carrier's hull, close enough to photograph and record acoustic data on one of the Soviet Navy's most significant warships, a remarkably nerve-shredding piece of intelligence-gathering carried out in complete secrecy at the height of the Cold War.

Nearly Two Decades of Service

Swiftsure arrived at Devonport for her first scheduled refit in January 1979, but industrial disputes delayed the work from actually beginning until 1980, and it did not complete until March 1983 at a cost of £85 million, a reminder that Cold War submarine maintenance could be every bit as fraught as the operations themselves.

The End of Her Service

Swiftsure was due to enter a second refit in 1992, but was decommissioned that year instead, with her nuclear core safely removed in June 1992.

She has remained in storage at Rosyth ever since, now serving as the demonstrator submarine for the Ministry of Defence's Submarine Dismantling Project, with completion of that process expected by the end of 2026, more than half a century after she first slid down the slipway at Barrow.