180219-M-NZ408-441 ATLANTIC OCEAN (Feb. 19, 2018) A U.S. Marine with the Maritime Raid Force, 26th Marine Expeditionary Unit (MEU), positions a M4A1 carbine during combat marksmanship training aboard the USS Oak Hill (LSD 51) while underway in the Atlantic Ocean. The 26th MEU is participating in a deployment at sea to conduct maritime and peacekeeping operations, as well as maintaining relationships with foreign militaries through joint exercises. (U.S Marine Corps photo by Cpl. Austin Livingston/Released)