After years of development and testing, Boeing recently revealed that it has virtually validated software for Future Manned Unmanned Refueling Missions using a simulator lab. According to Boeing, the results show that the communication time between F/A-18 pilots and unmanned MQ-25 Stringrays has been significantly reduced during refueling. This comes after the Marine Corps demonstrated the ability to refuel a CH-53K King Stallion helicopter while it was carrying a stripped-down F-35 fighter jet.