Royal Australian Navy frigate HMAS Sydney (FFG 03), right, Japan Maritime Self-Defense Force destroyer JS Murasame (DD 101), left, and the Arleigh Burke-class guided-missile destroyer USS Chung-Hoon (DDG 93) break formation behind the Arleigh Burke-class guided-missile destroyer USS Preble (DDG 88), not shown, during Pacific Bond 2013. Pacific Bond is a U.S. Navy, Royal Australian Navy, and Japan Maritime Self-Defense Force maritime exercise designed to improve interoperability and further relations between nations.