190206-N-JX484-004 NORTH SEA (Feb. 6, 2019) Gas Turbine Systems Technician (Mechanical) 1st Class Augusto Matias prepares a gas turbine motor for an internal water wash aboard the guided-missile destroyer USS Gravely (DDG 107). 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)