Soviet Submarine B-427

Sovet Submarine B-427 was a Project 641 (Foxtrot-class) diesel-electric attack submarine of the Soviet Navy. Foxtrots are among the largest non-nuclear submarines ever built.

Its keel was laid down on 10 April 1971 at Sudomekh Shipyard of Leningrad. It was launched on 22 June 1971 and commissioned on 4 December 1971.

For twenty-two years B-427 patrolled the Pacific, protecting the ballistic missile submarine bastions of the Pacific Fleet while based out of Vladivostok, Russia with the exception of a few temporary postings as part of the Soviet Submarine Squadron that was for a time based at the former US Navy base at Cam Ranh Bay, Vietnam. Such postings were normally for a period of between 8 to 12 months before returning to Vladivostok.

B-427 was decommissioned in 1994. On 25 July 1995, it was moved from Vladivostok to spend nearly three years at the Australian National Maritime Museum in Sydney. It left Sydney Harbor on 31 May 1998 for Long Beach, United States, arriving on 25 June and tying up next to RMS Queen Mary.