USS Thresher’s Tragic Implosion

In a fatal submarine accident in 1963, the nuclear submarine USS Thresher (SSN-593) sank to 610 m (2,000 ft), imploding in 0.1 seconds and killing all 128 crew members. Theoretically, the sub lost power during a failed deep dive test, causing its vital ballast systems to freeze and rendering the ship unusable.

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