The Day We Lost the H-Bomb: Cold War, Hot Nukes, and the Worst Nuclear Weapons Disaster in History

By that evening, rescue ships had discovered an oil slick, as well as floating cork and heavy yellow plastic, all common materials on nuclear submarines. Searchers knew that the Thresher couldn't survive much below her test depth, and the floating debris signaled a catastrophic failure. Within a day, the Navy knew the grim truth: Thresher was gone and all 129 men aboard had died, the worst death toll for a submarine accident in history. The Navy couldn't save the men, but it had to find the wreckage. The Thresher was the first in a new class of sub, and three more like it were already sailing at sea. The Navy had to learn why the Thresher had sunk, to keep the other ships out of danger. They also wanted to ensure that the Thresher's nuclear reactor hadn't leaked and contaminated the ocean and to dispel Soviet propaganda on the subject.

The Navy quickly organized a task force to find the wreckage, and put Captain Frank Andrews in charge. During the search, Captain Andrews had several Navy ships and submarines at his disposal, including a deep-diving vessel called the Trieste, purchased from the Swiss physicist Auguste Piccard several years before. But because few tools existed for deep-ocean work, the search was slow, frustrating, and improvised. (At one point, the crew of the Atlantis II, a WHOI vessel helping with the search, built a small dredge from baling wire and coat hangers and dragged it from their underwater camera rig.) It took two summers for the task force to locate the debris, photograph it, and bring back a definitive piece of the sub. “One of the many lessons learned from this tragedy,” Andrews wrote later, “was the U.S. Navy's inability to locate and study any object which was bottomed in the deep ocean.”

Frank Andrews was not the only person to come to this conclusion. In April 1963, soon after the accident, the secretary of the Navy formed a committee called the Deep Submergence Systems Review Group. The group's mission was to examine the Navy's capabilities for deep-ocean search and rescue and recommend changes. The group, chaired by Rear Admiral Edward C. Stephan, the oceanographer of the Navy, became known as the Stephan Committee.

The Stephan Committee released its report in 1964, advising the Navy to focus research in several key areas. The Navy should be able to locate and recover both large objects, such as a nuclear submarine, and small objects, such as a missile nose cone. It should train divers to assist in salvage and recovery operations anywhere on the continental shelf. Finally and most urgently, concluded the Stephan Committee, the Navy must develop a Deep Submergence Rescue Vehicle (DSRV) to rescue submariners trapped in sunken ships. To make the Stephan Committee's recommendations a reality, the Navy created a group called the Deep Submergence Systems Project, or DSSP.

The Deep Submergence Systems Project landed on the desk of John Craven, chief scientist of the Navy's Special Projects Office, which had overseen the development of the Polaris nuclear submarine. Craven knew that the DSSP was supposed to advance ocean search and recovery operations, not military intelligence or combat. But according to Craven, the intelligence community soon saw a role for the DSSP far beyond what the Stephan Committee had envisioned. Instead of just search, rescue, and recovery, the new technology created for DSSP could be used to gather information on the Soviets, investigating their lost submarines and missiles. Craven considered this a fine idea, though it ran counter to the original spirit of the mission.

To staff the DSSP, Craven inherited a jumble of existing projects, such as SEALAB, a Navy program to build an underwater habitat where divers could live and work for months. Craven also inherited the Trieste and its crew. Because of the DSSP's newfound intelligence-gathering role, much of its work was quickly classified, so that money seemed to disappear down a black hole.

Senator William Proxmire awarded the project a “Golden Fleece” award for its monumental cost overruns, most of which, according to Craven, were simply being diverted to secret projects.

Nearly three years after the Thresher disaster, on January 11 and 12, 1966, a conference called “Man's Extension into the Sea” convened in Washington, D.C., to review the progress of the DSSP.

In his keynote address, Under Secretary of the Navy Robert H. B. Baldwin said that this program, while chiefly serving the needs of the Navy, would also advance civilian science, engineering, and shipbuilding, and the general understanding of the ocean. Furthermore, he emphasized, DSSP was not just another money-sinking bureaucracy. Rather, it stood ready for action: I want to stress that we have no intention of building a paper organization with empty boxes and unfilled billets. Over 2,000 years ago, Petronius Arbiter stated: