american_submarine_nr-1 | builder | general_dynamics_electric_boat <sep> deep submergence vessel nr-1 was a unique united states navy (usn) nuclear-powered ocean engineering and research submarine, built by the electric boat division of general dynamics at groton, connecticut nr-1 was launched on 25 january 1969, completed initial sea trials 19 august 1969, and was home-ported at naval submarine base new london nr-1 was the smallest nuclear submarine ever put into operation the vessel was casually known as 'nerwin' and was never officially named or commissioned the us 
general dynamics electric boat is the builder of the american submarine nr-1.submarine was built by general dynamics electric boat division at groton, connecticut