190205-N-JX484-004 NORTH SEA (Feb. 5, 2019) The guided-missile destroyer USS Gravely (DDG 107), the Polish navy guided-missile frigate ORP General Kazmierz Pulaski (FrR 232) and the Spanish navy replenishment oiler ESPS Cantabria (A 15) transit the North Sea during Dynamic Guard 2019. Gravely is underway as the flagship of Standing NATO Maritime Group 1 to conduct maritime operations and provide a continuous maritime capability for NATO in the northern Atlantic. (U.S. Navy photo by Mass Communication Specialist 2nd Class Mark Andrew Hays/Released)