On January 8, 2005, the U.S. Navy nuclear attack submarine USS San Francisco struck an uncharted undersea mountain while submerged in the Pacific Ocean. Running deep beneath the surface at high speed, the Los Angeles-class submarine slammed into a seamount southeast of Guam, crushing its bow, injuring nearly 100 sailors, and killing Machinist’s Mate Second Class Joseph Allen Ashley. This is the true story of one of the most shocking submarine accidents in modern naval history. In this military history documentary, we explore how a nuclear-powered U.S. Navy submarine could crash into an underwater mountain, what happened inside the USS San Francisco during the collision, how the crew saved the damaged submarine, and why the pressure hull and nuclear reactor survived. From submarine navigation and sonar limitations to ocean mapping, seamounts, naval investigations, and the incredible repai

Source: The Nuclear Submarine That Crashed Into a Mountain