PACIFIC OCEAN (April 14, 2021) Sailors aboard the Military Sealift Command hospital ship USNS Mercy (T-AH 19) prepare to fuel an MV-22B Osprey assigned to Air Test and Evaluation (HX) Squadron 21 of Naval Air Station (NAS) Patuxent River, Md., on the ship's flight deck for the first time. Mercy is underway off the coast of Southern California completing a Dynamic Interface exercise, where the ship's aviation facilities will be evaluated for compatibility with the V-22 Osprey and MH-60 Seahawk, and establish launch and recovery windows in adverse weather conditions. Mercy recently returned to its homeport in San Diego from a regular overhaul in Portland, Ore., where improvements were made to its flight deck to support multiple aircraft platforms. Mercy must be in a five-day-activation status in order to support missions over the horizon, and be ready, reliable and resilient to support mission commanders. (U.S. Navy photo by Mass Communication Specialist 3rd Class Jake Greenberg)