190730-N-BM428-0018 STRAIT OF GIBRALTAR (July 30, 2019) Ensign Christina Howald uses the centerline pelorus on the bridge of the Arleigh Burke-class guided-missile destroyer USS Donald Cook (DDG 75) while transiting the Strait of Gibraltar, July 30, 2019. Donald Cook, forward deployed to Rota, Spain, is on its ninth patrol in the U.S. 6th fleet area of operations in support of U.S. national security interests in Europe and Africa. (U.S. Navy photo by Mass Communication Specialist 3rd Class Damon Grosvenor/Released)