Reading Red Mars inspired this rover. A geared motor drives the giant (13 stud diameter) rear wheels and the fiberoptic engine. A micromotor steers the vehicle. To enter the rover, the astronauts can climb up a ladder on the bottom and into an airlock which opens into the main cabin. Inside are four bunks, a kitchenette, a laboratory station, a fully instrumented cockpit, and storage lockers for spacesuits.