170424-N-PD309-013 CHANGI, Singapore (April 24, 2017) Lt. Cmdr. Edward Davis, assigned to Engineering Assessments Pacific, conducts a safe-to-operate walkthrough with Sailors in a main engine room during engineering operations certification aboard the littoral combat ship USS Coronado (LCS 4). The ship is on a rotational deployment to U.S. 7th Fleet area of responsibility, patrolling the region's littorals and working hull-to-hull with partner navies to provide 7th Fleet with the flexible capabilities it needs now and in the future. (U.S. Navy photo by Mass Communication Specialist 3rd Class Deven Leigh Ellis/Released)