Interesting spec for the RAF Voyagers. I guess they didn't consider coalition ops. Our RAAF KC-30A's [MRTT] can feed both ways and receive through boom from anyone with a boom. The RAAF E-7A, C-17A and P-8A all take the boom as do our F-35A's while the Super Hornet, Hornet and Growler fleets take the hose. I note Singapore, Korea, Saudi MRTT's all do both....