190616-N-N1604-2101 BALTIC SEA (June 16, 2019) A Sailor aboard the Royal Danish Navy patrol frigate HDMS Thetis (F 357), assigned to Standing NATO Mine Countermeasures Group One (SNMCMG1), stands watch during a surface exercise (SURFEX) while transiting the Baltic Sea during exercise Baltic Operations (BALTOPS) 2019. BALTOPS is the premier annual maritime-focused exercise in the Baltic Region, marking the 47th year of one of the largest exercises in Northern Europe enhancing flexibility and interoperability among allied and partner nations. (NATO photo by CPO Brian Djurslev/Released)