MV-22B Osprey tiltrotor aircraft perform landing and takeoff testing, at night, aboard the USNS Mercy (T-AH-19) hospital ship off the coast of Southern California on April 19, 2021. Mercy is completing Dynamic Interface Testing, where the ship’s aviation facilities will be evaluated for compatibility with the MV-22B Osprey and MH-60 Seahawk, and establish launch and recovery windows in adverse weather conditions.