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In page Soviet submarine K-19:

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During a test dive to the maximum depth of 300 m (980 ft), flooding was reported in the reactor compartment, and Captain Zateyev ordered the submarine to immediately surface, where the boat heeled over on her port side due to the water she had taken on. It was later determined that during construction the workers had failed to replace a gasket.[1] In October 1960, the galley crew disposed of wood from equipment crates through the galley's waste system, clogging it. This led to flooding of the ninth compartment, which filled one third full of water. In December 1960, a loss of coolant was caused by failure of the main circuit pump. Specialists called from Severodvinsk managed to complete repairs at sea within a week.[citation needed]