Stationed in Earth’s high-troposphere, Cloudbase is the floating headquarters of Spectrum, the organisation leading the fight against the fearsome Mysteron invaders. Held up by colossal hover combine jet thrusters and run by cahelium engines, the enough aircraft carrier can fly to any position on Earth in a matter of hours. It carries with it a fleet of passenger jets and helicopters for its personnel, as well as the fearsome Angel Interceptor jets for when it needs to be defended.