Reference Entry
LOSS OF USS THRESHER
Off the New England coast, the nuclear-powered submarine USS Thresher was conducting deep-diving tests when something went catastrophically wrong. Communications suggested trouble with systems and attempts to surface as the boat descended beyond its safe limits. Moments later, contact was lost, and later analysis pointed to flooding and a reactor shutdown that left the submarine unable to recover.
Dated Historical Context
A RECORDED MOMENT IN HISTORY
Loss of USS Thresher
Off the New England coast, the nuclear-powered submarine USS Thresher was conducting deep-diving tests when something went catastrophically wrong. Communications suggested trouble with systems and attempts to surface as the boat descended beyond its safe limits. Moments later, contact was lost, and later analysis pointed to flooding and a reactor shutdown that left the submarine unable to recover. All on board perished, making it one of the worst submarine accidents in United States Navy history. The tragedy led to a searching review of design, construction, maintenance, and operating procedures. Out of that review came the SUBSAFE program, a rigorous set of standards and checks intended to prevent such failures in the future. In this way, a single day of loss reshaped how the Navy approached underwater safety, influencing generations of submariners and the engineers who build and support their boats.
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