The Corps is on track to turn the MV-22 into a refueling tanker
By: Shawn Snow  
The vastness of the Pacific Ocean presents a major obstacle to Marine forces. As such, the Corps wants to bridge that “tyranny of distance†by turning its MV-22 Ospreys into an air refueling tanker to extend the range of its fighter and tilt-rotor aircraft.
Known as the V-22 Aerial Refueling System, or VARS, the system will help extend the range of F-35Bs, and other V-22s by providing an additional 10,000 pounds of fuel to aircraft forward deployed with Marine Expeditionary Units. The Corps expects its new refueling system to be operational by fiscal year 2019.
https://www.marinecorpstimes.com/news/your-marine-corps/2018/04/23/the-corps-is-on-track-to-turn-the-mv-22-into-a-refueling-tanker/