USS Scorpion (SSN-589) was a Skipjack-class nuclear powered submarine that served in the United States Navy and the sixth vessel of the U.S. Navy to carry that name. In the mid-1950s, the U.S. Navy was still pushing nuclear propulsion out to the submarine fleet. The results of the U.S. Navy's various investigations into the loss of Scorpion are inconclusive. For reasons that even now are a closely guarded secret, that happened in late May 1968 when the nuclear attack submarine USS Scorpion (SSN-589) sank in the middle of the Atlantic Ocean as she was returning from a long deployment. USS Scorpion (SSN-589) was a United States nuclear submarine of the "Skipjack" Class. The pressures below 2,000 feet can crush a submarine like an aluminum can in seconds. Taking hull damage can reduce crush depth by up to 50%. The U-boat War in World War Two (Kriegsmarine, 1939-1945) and World War One (Kaiserliche Marine, 1914-1918) and the Allied efforts to counter the threat. Hull streamlining, reduction in sail dimensions by approximately 50%, quieting of the propulsion plant and an increase in test depth all led to a dramatic advance in submarine operational capabilities and stealth. USS Scorpion (SSN-589) was a Skipjack-class nuclear submarine of the United States Navy, and the sixth ship of the U.S. Navy to carry that name. Scorpion was lost on 22 May 1968, with 99 crewmen dying in the incident. The results of the U.S. Navy's various investigations into the loss of Scorpion are inconclusive. Scorpion (SSN-589), a Skipjack-class submarine, sank May 22, 1968, evidently due to implosion upon reaching its crush depth. There are various theories about the loss. Scorpion was made by the Electric Boat Division of the General Dynamics Corporation in Groton, Connecticut at a cost of 40 million dollars and was commissioned on July, 29th 1960. SOVIET UNION The USS Scorpion (SSN-589) sank 400 miles southwest of the Azores islands in the Atlantic Ocean while returning from a Mediterranean deployment in May 1968, killing all the 99 crew onboard. Yet the Albacore was a conventional submarine. They were a significant improvement on the Skipjack class, with greatly improved sonar, diving depth, and silencing. Location: 740 kilometres (400 nmi) southwest of the Azores. Her hull had split in two and collapsed as it sank below crush depth. Wikipedia tells us that: > Nine nuclear submarines have sunk as a consequence of either accident or extensive damage: two from the United States Navy (USN), five from the Soviet Navy (one of which sank twice), and two from the Russian Navy. There are various theories about the loss. All 99 men on board died. USS Scorpion, another nuclear submarine, was lost in May, 1968 USS Scorpion was a Skipjack class nuclear submarine due to return to its homeport of Norfolk in May, 1968. The Permit class was based on Project Nobska’s recommendations. Location: 740 kilometres (400 nmi) southwest of the Azores. Hull streamlining, reduction in sail dimensions by approximately 50%, quieting of the propulsion plant and an increase in test depth all led to a dramatic advance in submarine operational capabilities and stealth. This was the USS Scorpion, a Skipjack Class submarine.