A U.S. Navy sailor braces against the bow railing of his ship to fire a Thompson submachine gun out over rough Pacific seas during World War II. Personal weapons like the Thompson, though not standard shipboard armament, were sometimes issued or carried for boarding actions, small-boat defense, or informal target practice at floating debris and sea life during quiet stretches of a long deployment. The image captures a rare, unscripted moment of action amid the routine of naval life at sea. Project: 218696