170716-N-XN518-005 PACIFIC OCEAN (July 16, 2017) Sailors plot the location information for a dead reckoning tracker during well deck operations aboard the Wasp-class amphibious assault ship USS Essex (LHD 2). The ship is underway conducting sea trials off the coast of Southern California. (U.S. Navy photo by Mass Communication Specialist 2nd Class Irwin D. Sampaga/Released)