Assigned to Submarine Squadron 6, Division 62, Scorpion departed [New London, Connecticut]?, on August 24 for a two-month deployment in European waters. During that period, she participated in exercises with units of the 6th Fleet and of other NATO navies. After returning to New England in late October, she trained along the eastern seaboard until May 1961, then crossed the Atlantic again for operations which took her into the summer. On August 9, she returned to New London and, a month later, shifted to [Norfolk, Virginia]?.
With Norfolk her home port for the remainder of her career, Scorpion specialized in the development of nuclear submarine warfare tactics. Varying her role from hunter to hunted, she participated in exercises which ranged along the Atlantic coast and in the Bermuda and Puerto Rican operating areas; then, from June 1963 to May 1964, she interrupted her operations for an overhaul at [Charleston, South Carolina]?. Resuming duty off the eastern seaboard in late spring, she again interrupted that duty from August 4 to October 8 to make a transatlantic patrol. In the spring of 1965, she conducted a similar patrol in European waters.
During the late winter and early spring of 1966, and again in the fall, she was deployed for special operations. Following the completion of those assignments, her commanding officer received the Navy Commendation Medal for outstanding leadership, foresight, and professional skill. Other Scorpion officers and men were cited for meritorious achievement.
On February 1, 1967, Scorpion entered the [Norfolk Naval Shipyard]? for another extended overhaul. In late October, she commenced refresher training and weapons system acceptance tests. Following type training out of Norfolk, she got underway on February 15, 1968 for a Mediterranean deployment. She operated with the 6th Fleet, into May, and then headed west for home. On May 21, she indicated her position to be about 50 miles south of the Azores?. Six days later, she was reported overdue at Norfolk.
A search was initiated, but, on June 5, Scorpion and her crew were declared "presumed lost." Her name was struck from the Navy list on June 30.
The search continued, however; and, at the end of October, the Navy's oceanographic research ship, [USS Mizar (T-AGOR-11)]? located sections of Scorpion's hull in more than 10,000 feet of water about 400 miles southwest of the Azores. Subsequently, the Court of Inquiry was reconvened and other vessels, including the submersible [[Trieste]] were dispatched to the scene and collected a myriad of pictures and other data.
Although the cause of her loss is still not ascertainable, the most probable event was the inadvertent activation of the battery of a Mark 37 torpedo? during a torpedo inspection. The torpedo, in a fully ready condition and without a propeller guard, then began a live "hot run" within the tube. Released from the tube, the torpedo became fully armed and successfully engaged its nearest target, Scorpion. Alternatively, the torpedo may have exploded in the tube owing to an uncontrollable fire in the torpedo room.
The explosion--recorded elsewhere as a very loud acoustic event--broke the boat into two major pieces, with the forward hull section, including the torpedo room and most of the operations compartment, creating one impact trench while the aft section, including the reactor compartment and engine room, created a second impact trench. The aft section of the engine room is inserted forward into a larger diameter hull section in a manner similar to a telescope. The sail is detached and lies nearby in a large debris field.
The Navy has periodically monitored the environmental conditions of the site since the sinkings and reported the results in an annual public report on environmental monitoring for U.S. Naval nuclear-powered ships. These reports confirm that two nuclear tipped torpedoes were aboard Scorpion when the ship was lost. These reports provide specifics on the environmental sampling of sediment, water and marine life which were taken to ascertain whether the submarine has had a significant effect on the deep ocean environment. The reports also explain the methodology for conducting deep sea monitoring from both surface vessels and submersibles. The monitoring data confirms that there has been no significant affect on the environment. Nuclear fuel in the submarine remains intact and no plutonium in excess of levels expected from fallout from past atmospheric weapons testing has been detected.
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