180207-N-NB178-046 ATLANTIC OCEAN (Feb. 7, 2018) Lt. Erik Dahl, assigned to the Vipers of Helicopter Maritime Strike (HSM) 48 Squadron, prepares to lift off during flight quarters aboard the guided-missile destroyer USS Forrest Sherman (DDG 98). Forrest Sherman is underway as part of the Harry S. Truman Carrier Strike Group (HSTCSG) during a composite training unit exercise (COMPTUEX), which evaluates the strike group’s ability as a whole to carry out sustained combat operations from the sea, ultimately certifying the HSTCSG for deployment. (U.S. Navy photo by Mass Communication Specialist 2nd Class Tyrell K. Morris/Released)