170712-N-TR360-373 ATLANTIC OCEAN (Aug. 11, 2017) Cmdr. Jon Schaffer, commanding officer of the Ohio-class ballistic-missile submarine USS Tennessee (SSBN 734), stands on the bridge as the boat transits on the surface during a routine strategic deterrent patrol in the Atlantic Ocean. Tennessee is one of 6 ballistic-missile submarines stationed at Naval Submarine Base Kings Bay, Ga., providing the most survivable leg of the strategic deterrence triad for the U.S. (U.S. Navy photo by Lt. Joe Painter/Released)