The K-129 was a Project 629A diesel-electric-powered ballistic-missile submarine that served in the Pacific Fleet of the Soviet Navy–one of six Project 629 strategic ballistic-missile submarines assigned to the 15th Submarine Squadron based at Rybachiy Naval Base near Petropavlovsk, commanded by Rear Admiral Rudolf Golosov. The K-129's commander was Captain First Rank V. I. Kobzar, and she carried the hull number 722 on her final deployment, during which she sank on 8 March 1968.
25 years after people: The casings of the torpedoes have become weak, and with the pressure of the deep ocean water, a single small crack can cause a fatal explosion. the ocean leaks into the casings of the torpedoes, and the torpedoes explode, but the explosion is muted by the pressure of the ocean. The torpedo’s plutonium core is scattered over a small area and any sea creatures that come in contact with it die of radiation poisoning.