190521-N-JX484-012 BALTIC SEA (May 21, 2019) Hospital Corpsman 2nd Class Jesus Munguia Barrera performs CPR on a training dummy during a basic life support training course aboard the guided-missile destroyer USS Gravely (DDG 107). Gravely is underway on a scheduled deployment 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)