160317-N-FQ994-273 MEDITERRANEAN SEA (March 17, 2016) -- Operations Specialist Seaman Daniel Holmes, a search and rescue swimmer, from Houston, signals to Sailors aboard USS Porter (DDG 78) during a man overboard drill March 17, 2016. Porter, an Arleigh Burke-class guided-missile destroyer, forward-deployed to Rota, Spain, is conducting a routine patrol in the U.S. 6th Fleet area of operations in support of U.S. national security interests in Europe. (U.S. Navy Photo by Mass Communication Specialist 3rd Class Robert S. Price/Released)