 RIM of the Pacific, or RIMPAC, has a longstanding tradition that was established in 1971. Held every two years by Commander U.S. Pacific Fleet and executed by Commander U.S. Third Fleet, RIMPAC is taking place for the 25th time. Most recently, Patrol Squadron 1 performed anti-submarine and maritime surveillance aboard a P-3 Orion in and around the Hawaiian Islands and Southern California. This latest exercise is just a small glimpse of the world's largest international maritime exercise. Over the 36 days that RIMPAC takes place this year, 26 nations will participate, including 40 ships and submarines, more than 200 aircraft and 25,000 personnel. RIMPAC provides a unique real-world training opportunity that helps participating countries foster and sustain relationships necessary to keep the world's oceans safe.