CELTIC SEA (April 11, 2021) Machinist's Mate 3rd Class Daniel Vintimilla, assigned to the Wasp-class amphibious assault ship USS Iwo Jima (LHD 7), inspects a fuel sample in the ship's oil lab during a replenishment-at-sea, April 11, 2021. Iwo Jima is underway in the Celtic Sea with Amphibious Squadron 4 and the 24th Marine Expeditionary Unit (24th MEU) as part of the Iwo Jima Amphibious Ready Group. (U.S. Navy photo by Mass Communication Specialist 3rd Class Larry D. Lockett Jr.)