Navy Chief Petty Officer James W. Wassmer monitors a side scan sonar image from a Battle-Space Preparation Autonomous Underwater Vehicle onboard the High-Speed Vessel Swift (HSV 2) during Exercise Rim of the Pacific'04 on July 9, 2004. Exercise Rim of the Pacific '04 is an international maritime exercise designed to enhance the tactical proficiency of participating Pacific Rim nations including participants from Australia, Canada, Chile, Japan, South Korea, the United Kingdom, and the U.S.