Summary and Key Points: The Sturgeon-class submarines, developed during the Cold War, were the cornerstone of the U.S. Navy's attack sub fleet. -These nuclear-powered vessels were designed as an ...

Open Hatches: On May 15, 1969, the USS Guitarro (SSN-665), a Sturgeon-class nuclear-powered attack submarine, sank while under construction at the Mare Island Naval Shipyard in California.

In August 1993, when the USS Pargo, a Sturgeon-class attack submarine, went to sea with five civilian scientists aboard, George Newton smiled. It had been the end of a long journey for him.