180301-N-PM193-190 PACIFIC OCEAN (March 1, 2018) Sailors assigned to amphibious assault ship USS Boxer (LHD 4) scrub the hangar bay deck following an aqueous film forming foam sprinkler system test. Boxer is underway off the coast of Southern California for contractor sea trials. (U.S. Navy photo by Mass Communication Specialist 3rd Class Alexander C. Kubitza/Released)