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1968: USS Scorpion is sunk with 99 crewmen 400 miles SW of the Azores. It was one of four mysterious submarine disappearances in 1968; the others being the Israeli submarine INS Dakar, the French submarine Minerve (S647) and the Soviet submarine K-129. "
The cause of the sub's loss remains hotly disputed. A Navy Court of Inquiry found "the cause of the loss cannot be definitively ascertained."
"The families of those 99 men are still out there, and they want to know what happened," says former U.S. naval officer Paul Boyne, who presented a new mechanical explanation for the loss of the sub at a recent marine forensics symposium outside Washington.
Calls for an expedition to the sub's wreck, saying it might put to rest a multitude of theories about the Scorpion's demise — ranging from a covert Soviet attack to a torpedo self-firing into the ship to a faulty trash disposal, have not been forthcoming.
Evidence for a more mundane explanation comes from the sub's propeller shaft; Undersea photographs show it rests about 20 yards outside the wreck on the seafloor, about 11,220 feet underwater. Rubber bearings holding the propeller shaft failed, putting stress on the coupling connecting it to the engine. The coupling's bolts failed catastrophically during a deep test dive, the theory goes, spilling water into the sub too rapidly to allow ballast maneuvers to raise the ship to the surface." Of some interest ...until we get down there for a 'definitive' look...http://www.historynet.com/the-uss-scorpion-buried-at-sea.htm