sentences:  Manned alternately by two crews, Blue and Gold, like all US Navy ballistic missile submarines, to maximize her submerged operations, "Patrick Henry" underwent shakedown with the Blue crew until 16 September 1960, when the Gold crew took over.The second fleet ballistic missile (FBM) submarine, she commenced her first deterrent patrol in December 1960 with her Blue Crew on board.When she surfaced off Holy Loch, Scotland, on 8 March 1961, she had set a record for her type, cruising submerged 66 days and 22 hours.