CELTIC SEA (April 20, 2021) Aircrew Survival Equipmentman 1st Class Marques Whitlock, left, and Aircrew Survival Equipmentman 3rd Class Jade Vitelli install carbon dioxide canisters on LPU-41 life preservers aboard the Wasp-class amphibious assault ship USS Iwo Jima (LHD 7), April 20, 2021. Iwo Jima is operating in the Celtic Sea with Amphibious Squadron 4 and the 24th Marine Expedition Unit (24th MEU) as part of the Iwo Jima Amphibious Ready Group (U.S. Navy photo by Mass Communication Specialist 3rd Class Travis Baley)