APRA HARBOR, Guam (Dec. 20, 2021) Chief Builder David Madmon, assigned to Underwater Construction Team 2 (UCT-2), conducts pre-dive equipment checks on a Republic of Korea (ROK) UCT diver during the Multinational Underwater Repair Exercise (MUREX 21) in Apra Harbor, Guam on December 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). (Photo by Information Systems Technician Second Class Michael Czuprynski).