180726-N-UM082-0123 PACIFIC OCEAN (July 26, 2018) the Royal Canadian Navy supply ship MV Asterix and other ships and submarines participate in a group sail during the Rim of the Pacific (RIMPAC) exercise off the coast of Hawaii, July 26, 2018. Twenty-five nations, 46 ships and five submarines, and 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. (U.S. Navy photo by Mass Communication Specialist 2nd Class Raymond Minami/Released)