 By 21 May 2013, the Voyager fleet had carried over 50,000 passengers and carried over 3,000 tons of cargo.A total of 14 Voyagers form the fleet, with nine allocated to sole RAF use (three KC2s and six KC3s).As the Voyagers lack a refueling boom, the RAF has requested a memorandum of understanding (MoU) with the USAF allowing the UK access to tankers equipped with refueling booms for its Boeing RC-135W Airseeker SIGINT aircraft.