U.S. Navy Gas Turbine Systems Technician Mechanical Fireman Daniel McCray tests a fuel line for water in the mess line passageway of the guided missile frigate USS Underwood (FFG 36) during a routine fuel test in the Caribbean Sea, July 24, 2012, during Southern Seas 2012. Southern Seas is a U.S. Southern Command-directed operation designed to strengthen relationships with regional partner nations and improve operational readiness for all assigned units. (U.S. Navy photo by Mass Communication Specialist 3rd Class Frank J. Pikul)