Hospital Corpsman 2nd Class Rayna Castle a U.S. Navy reservist assigned to Navy Cargo Handling Battalion (NCHB)14 records her patient vitals during observation phase of transport to hospital ship USNS Mercy (T-AH 19) as part of a humanitarian assistance disaster relief scenario during Rim of the Pacific (RIMPAC) 2014. Twenty-two nations, 49 ships, six submarines, more than 200 aircraft and 25,000 personnel are participating in RIMPAC exercise from June 26 to Aug. 1, in and around the Hawaiian Islands. The world's largest international maritime exercise, RIMPAC provides a unique training opportunity that helps participants foster and sustain the cooperative relationships that are critical to ensuring the safety of sea lanes and security on the world's oceans. RIMPAC 2014 is the 24th exercise in the series that began in 1971. (U.S. Navy photo by Chief Mass Communication Specialist Scott Kessler/Released)