150326-N-NI474-235 WATERS NEAR GUAM Japan Maritime Self-Defense Force guided-missile destroyer JS Atago conducts a replenishment-at-sea with USNS Pecos during Multi-Sail 2015. Multi-Sail is an annual Destroyer Squadron 15 exercise designed to assess combat systems, improve teamwork and increase warfighting capabilities in the U.S. 7th Fleet area of responsibility. Japan Maritime Self-Defense Force is participating in Multi-Sail for the first time to improve interoperability and strengthen U.S.-Japan alliance.