CELTIC SEA (April 15, 2021) Sgt. Devin Salamaca, left, and Sgt. Shaquille Turner, both assigned to the 24th Marine Expeditionary Unit (24th MEU), perform intermediate maintenance on a radar altimeter onboard the Wasp-class amphibious assault ship USS Iwo Jima (LHD 7), April 15, 2021 Iwo Jima is underway in the Celtic Sea with Amphibious Squadron 4 and the 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.)