150604-N-HE318-309 PACIFIC OCEAN (June 4, 2015) Cmdr. Darren Delaney, left), of the Royal Australian Navy, from Sydney, Australia, discusses the course of the Military Sealift Command hospital ship USNS Mercy (T-AH 19) with Cmdr. Lisa Kelty, from Carlsbad, Calif., during Pacific Partnership 2015. Pacific Partnership is in its tenth iteration and is the largest annual multilateral humanitarian assistance and disaster relief preparedness mission conducted in the Indo-Asia-Pacific region. (U.S. Navy photo by Mass Communication Specialist 3rd Class William McCann/Released)