180711-N-PF688-003 JOINT BASE PEARL HARBOR-HICKAM, Hawaii (July 11, 2018) U.S. Navy Builder 1st Class David Madmon, from Naval Facilities Engineering Command Engineering and Expeditionary Warfare Center, shows South Korean navy's Cmdr. Sung and Jason Langton, from U.S. 3rd Fleet, how to use a multibeam survey system during Rim of the Pacific (RIMPAC) exercise 2018. Twenty-five nations, 46 ships, five submarines, about 200 aircraft, and 25,000 personnel are participating in RIMPAC from June 27 to Aug. 2 in and around the Hawaiian Islands and Southern California. The world’s largest international maritime exercise, RIMPAC provides a unique training opportunity while fostering and sustaining cooperative relationships among participants critical to ensuring the safety of sea lanes and security of the world’s oceans. RIMPAC 2018 is the 26th exercise in the series that began in 1971. UCT-2 provides responsive inshore and underwater construction capabilities under the guidance of Commander, Task Force 75. They are able to construct, inspect, repair, and maintain ocean facilities as well as underwater systems. (U.S. Navy photo by Lt. Cmdr. Mike Dobling)