PACIFIC OCEAN (July 29, 2013) Sailors stand ready as a MH-60 Sea Hawk helicopter participates in a dock landing qualification on the flight deck of amphibious dock landing ship USS Harpers Ferry (LSD 49). Harpers Ferry, part of the Boxer Amphibious Ready Group (ARG), is underway off the coast of southern California completing a certification exercise (CERTEX). CERTEX is the final evaluation of the 13th Marine Expeditionary Unit (13th MEU) and Boxer ARG prior to deployment and is intended to certify their readiness to conduct integrated missions across the full spectrum of military operations. (U.S. Navy photo by Mass Communication Specialist 3rd Class Mark El-Rayes)