CELTIC SEA (April 14, 2021) Boatswain's Mate 2nd Class Anthony Kline, assigned to the amphibious transport dock ship USS San Antonio (LPD 17), signals that the knuckle boom crane is attached to a rigid-hull inflatable boat during routine boat operations, April 14, 2021. San Antonio is operating in the Celtic Sea with Amphibious Squadron 4 and the 24th Marine Expeditionary Unit (MEU) as part of the Iwo Jima Amphibious Ready Group. (U.S. Navy photo by Mass Communication Specialist Jacob M. Turrigiano)