Quartermaster Seaman Sean Gervais, from the Province of British Columbia charts the position of amphibious transport dock ship USS Denver (LPD 9). Denver is assigned to Expeditionary Strike Group Seven and is participating in Exercise Ssang Yong, an annual combined exercise conducted by Navy and Marine forces with the Republic of Korea in order to strengthen interoperability across the range of military operations. (U.S. Navy photo by Mass Communication Specialist 3rd Class Bradley J. Gee/Released)