Ganymede Freighter Aphelion is a transport ship that hauls raw materials between installations on the moons of Jupiter. In the future, mining crews melt giant sink holes in Ganymede's icy crust down to the salt water oceans below, a little like ice fishing in the arctic. The ocean is used as a source of propellant for deep space exploration ships. Freighter Aphelion travels between the moons in space, and then lands on the Ganymede Ocean where it converts to an amphibious vehicle, glides along the water to the port, and receives its cargo. Inspired by Star Wars ships, submarines and tug boats, after an initial sketch, this image was painted digitally over a few simple 3d blocks.