![]() The submarine was eventually completed and commissioned.Ĭlass=notpageimage| The location of sunken nuclear submarines in the Arctic USS Guitarro: sank while pier-side in shipyard due to improper ballasting.Location: 740 kilometres (400 nmi) southwest of the Azores. There are various theories about the loss. Navy's various investigations into the loss of Scorpion are inconclusive. USS Scorpion, a Skipjack-class submarine, sank May 22, 1968, evidently due to implosion upon reaching crush depth.Location: 350 km (190 nmi) east of Cape Cod. All 129 on board died, including shipyard personnel supporting the deep-diving tests. USS Thresher, the first submarine in her class, sank Apduring deep-diving trials after flooding, loss of propulsion, and a failed attempt to blow the emergency ballast tanks, causing it to exceed crush depth.The ninth submarine, K-429, was raised and returned to active duty after both of her sinkings. Eight of the submarines are underwater wrecks in the Northern Hemisphere, five in the Atlantic Ocean and three in the Arctic Ocean. Only USS Scorpion's reason for sinking is unknown. Of the nine sinkings, two were caused by fires, two by weapon explosions, two by flooding, one by bad weather, and one by scuttling due to a damaged nuclear reactor. All five of the Soviet/Russian nuclear submarines that remain sunken belonged to the Northern Fleet, while the refloated K-429 was in the Pacific Fleet. The two USN submarines belonged to Submarine Force Atlantic, in the U.S. The Soviet submarine K-129 carried nuclear ballistic missiles when it was lost with all hands, but as it was a diesel-electric submarine, it is not included in the list. All sank as a result of accident except for K-27, which was scuttled in the Kara Sea when proper decommissioning was considered too expensive. Three were lost with all hands – the two from the United States Navy (129 and 99 lives lost) and one from the Russian Navy (118 lives lost), and are amongst the largest losses of life in a submarine (along with the non-nuclear USS Argonaut with 102 lives lost and Surcouf with 130 lives lost). The Soviet Navy lost five (one of which sank twice), the Russian Navy two, and the United States Navy (USN) two. Nine nuclear submarines have sunk, either by accident or scuttling. Class=notpageimage| The location of sunken nuclear submarines in the Atlantic
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