161114-N-CW570-0043 SYDNEY, Australia (Nov. 14, 2016) Master Chief Petty Officer Bill Costin, and Cmdr. Sean Slappy, command master chief and commanding officer of Mobile Diving Salvage Unit (MDSU) 1, scuba dive on the HMAS Adelaide (FFG 01) shipwreck during Exercise Dugong 2016, in Sydney, Australia. Dugong is a bi-lateral U.S Navy and Royal Australian Navy training exercise, advancing tactical level U.S. service component integration, capacity, and interoperability with Australian Clearance Diving Team (AUSCDT) ONE. (U.S. Navy photo by Petty Officer 1st Class Arthurgwain L. Marquez/Released)