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Atomic submarine USS Nautilus enters New York Harbour. Orginal Artist: Official US Navy Photograph. (Photo by Keystone/Getty Images)

Atomic submarine USS Nautilus enters New York Harbour.  Orginal Artist: Official US Navy Photograph.  (Photo by Keystone/Getty Images)

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1955: The US atomic submarine Nautilus during trials off Groton, Connecticut. (Photo by Keystone/Getty Images)

1955:  The US atomic submarine Nautilus during trials off Groton, Connecticut.  (Photo by Keystone/Getty Images)

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21st January 1955: The Nautilus, the world's first atomic submarine beginning her trials at Groton, Connecticut. (Photo by Keystone/Getty Images)

21st January 1955:  The Nautilus, the world's first atomic submarine beginning her trials at Groton, Connecticut.  (Photo by Keystone/Getty Images)

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12th August 1958: The American nuclear powered submarine Nautilus, with the crew on deck, arriving at Portland harbour having travelled under the North Pole. (Photo by Keystone/Getty Images)

12th August 1958:  The American nuclear powered submarine Nautilus, with the crew on deck, arriving at Portland harbour having travelled under the North Pole.  (Photo by Keystone/Getty Images)

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USS Nautilus, the world's first atomic powered submarine being launched at Groton in Connecticut. (Photo by Keystone/Getty Images)

USS Nautilus, the world's first atomic powered submarine being launched at Groton in Connecticut.  (Photo by Keystone/Getty Images)