Tankers are 38 meters long and 10 meters wide, and support a crew complement of only four: pilot, co-pilot, one technician, and a safety engineer. Tankers are similar in speed to transports: 0.9 Mach within an atmosphere and 10-20% speed of light in space. Power source, propulsion, and composition are similar to that of the other shuttlecraft. The navigation system is a simplified version, capable of automated control for pre-programmed journeys. Tankers also have reinforced landing gear and structural bracing, as well as pressurized storage cylinder tanks composed of a self-sealing, non-osmotic alloy. Tankers do not carry any armaments.