APRA HARBOR, Guam (Dec. 20, 2021) A diver from the Republic of Korea Navy (ROKN) Underwater Construction Team (UCT) prepares a welding electrode for use in the installation of a zinc anode during the Multinational Underwater Repair Exercise (MUREX) 2021 in Apra Harbor, Guam, Dec. 20, 2021. This is the first-ever MUREX, an exercise designed to develop interoperability in underwater construction operations, build diving expertise, and foster camaraderie between the ROKN UCT and the U.S. Navy’s UCT-2 and Mobile Diving and Salvage Unit One (MDSU-1). (Courtesy photo by the Republic of Korea Navy)