The K-129 was diesel-powered: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Soviet_submarine_K-129_(1960)" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Soviet_submarine_K-129_(1960)</a><p>The missiles were nuclear-tipped, though.<p>More reading: <a href="http:&#x2F;&#x2F;military.wikia.com&#x2F;wiki&#x2F;Soviet_submarine_K-129_(1960)" rel="nofollow">http:&#x2F;&#x2F;military.wikia.com&#x2F;wiki&#x2F;Soviet_submarine_K-129_(1960)</a>