Thresher/Permit Class Submarine
The Thresher/Permit-class was a class of nuclear-powered fast attack submarines (hull classification symbol SSN) in service with the United States Navy from the 1960s until 1994. They replaced the Skipjack class. They were used primarily in the 1960s and 1970s, until replaced by the Sturgeon and Los Angeles classes.
The Thresher/Permit class resulted from a study commissioned in 1956 by the Chief of Naval Operations (CNO), Admiral Arleigh Burke. In "Project Nobska," the Committee on Undersea Warfare of the United States National Academy of Sciences considered the lessons learned from various prototypes and experimental platforms.
Read more about Thresher/Permit Class Submarine: Design, Armament, Construction, Boats
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“There is a struggle between the Oriental and the Occidental in every nation; some who would be forever contemplating the sun, and some who are hastening toward the sunset. The former class says to the latter, When you have reached the sunset, you will be no nearer to the sun. To which the latter replies, But we so prolong the day.”
—Henry David Thoreau (1817–1862)