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In page Soviet submarine K-219:

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Displeased with Britanov's inability to repair his submarine and continue his patrol, Moscow ordered Valery Pshenichny, K-219's security officer, to assume command, transfer the surviving crew back to the submarine, and return to duty. Before those orders could be carried out the flooding reached a point beyond recovery and on 6 October 1986 the K-219 sank to the bottom of the Hatteras Abyssal Plain[8] at a depth of about 6,000 m (18,000 ft). Britanov abandoned ship shortly before the sinking. K-219's full complement of nuclear weapons was lost along with the vessel.[citation needed]