The guided-missile destroyer USS Chung-Hoon (DDG 93), left, escorts a merchant ship in the Gulf of Aden, March 1, 2019, during Lucky Mariner 19. Lucky Mariner is an annual exercise led by Naval Coordination and Guidance for Shipping (NCAGS) alongside shipping and coalition maritime forces designed to exercise command and control and provide standardized direction during periods of increased tension to protect the free flow of commerce. ( Navy photo by Mass Communication Specialist 2nd Class Logan C. Kellums)

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Keywords: 19, 93, chicago, chung-hoon, ddg, lucky, maersk, mariner, sailor, uss