Supertanker fuel depot

A super tanker fuel depot was a type of starship built by the Galactic Empire to serve as refueling stations and depots. The depots were equipped with Class 2 hyperdrives and thrusters, enabling them to be landed on a planet from space. The Colossus platform on the ocean planet Castilon was one such depot, and by late in the cold war was one of the last such depots remaining.