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, California, arriving on 25 June and tying up next to RMS Queen Mary.
|Russian Designator||Project 641|
|Length||299 feet, 6 inches|
|Beam||24 feet, 7 inches|
|Displacement||1,952 tons surfaced
2,475 tons submerged
|Built:||Sudomekh Shipyard, Leningrad|
|Construction||3/8 inch outer light hull comprising ballast tanks.
7/8 inch QT28 Nickel Steel pressure hull.
|Maximum Diving Depth||985 feet|
|Speed||16 knots surfaced
15 knots submerged
9 knots snorkeling
|Range||20,000 miles surfaced at 8 knots
11,000 miles snorkeling
380 miles submerged at 2 knots
|Endurance||3 - 5 days submerged|
|Propulsion||3 x Kolomna 2D42M diesel engines, 2,000 hp each. 3 x electric motors; 2 with 1,350 hp and 1 with 2,700 hp. 1 x auxiliary motor with 180 hp. 3 x propeller shafts, each with 6 bladed propellers.|
|Radar||Surface search: Snoop Tray; I band.|
|Sonar||Herkules medium-frequency active/passive. Feniks passive search/attack.|
|Electronic Warfare||Stop Light, Radar Warning. Quad Loop Directional Finder.|