The USS Ethan Allen was about at the end of her string. Commissioned in 1961, she had served her crews and her country for over twenty years, carrying Polaris sea-launched ballistic missiles in endless patrols through sunless seas. Now she was old enough to vote, and this was very old for a submarine. Her missile tubes had been filled with ballast and sealed months before. She had only a token maintenance crew while the Pentagon bureaucrats debated her future. There had been talk of a complicated cruise missile system to make her into a SSGN like the new Russian Oscars. This was judged too expensive. Ethan Allen's was generation-old technology. Her S5W reactor was too dated for much more use. Nuclear radiation had bombarded the metal vessel and its internal fittings with many billions of neutrons. As recent examination of test strips had revealed, over time the character of the metal had changed, becoming dangerously brittle. The system had at most another three years of useful life. A new reactor would be too expensive. The Ethan Allen was doomed by her senescence.

The maintenance crew was made up of members of her last operational team, mainly old-timers looking forward to retirement, with a leavening of kids who needed education in repair skills. The Ethan Allen could still serve as a school, especially a repair school since so much of her equipment was worn out.