Flying ships from Barsoom, used for transport and warfare by the natives, they are most commonly referred to as Fliers, but on occasion referred to as Planes.
The fliers were developed using the 8th ray, and are sustained by the rays stored within buoyancy tanks. A flier can take off and land vertically in an area only slightly larger than the flier itself.
900 years before John Carters advent on mars the first great battleship was built in helium, but it had to great a quantity of the 8th ray. It sailed up into space with five hundred officers and men, never to return. It can still be seen with the aid of telescopes a tiny satellite that will encircle Barsoom till the end of time.