170903-N-QR145-070 MEDITERRANEAN SEA (Sept. 3, 2017) A rigid-hull inflatable boat watches over Sailors during an all-hands swim call aboard the Arleigh Burke-class guided-missile destroyer USS Porter (DDG 78) while underway in the Mediterranean Sea Sept. 3, 2017. Porter, forward-deployed to Rota, Spain, is on its fourth patrol in the U.S. 6th Fleet area of operations in support of regional allies and partners, and U.S. national security interests in Europe. (U.S. Navy photo by Mass Communication Specialist 3rd Class Krystina Coffey/Released)