CELTIC SEA (April 13, 2021) A knuckle boom crane prepares to lower a rigid-hull inflatable boat (RHIB) into the water aboarad the amphibious transport dock ship USS San Antonio (LPD 17), April 13, 2021. San Antonio is operating 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 Seaman Jacob M. Turrigiano)