The Heavy Equipment Transport System (HETS) consists of the M1070 Truck Tractor and the M1000 Heavy Equipment Transporter Semi-trailer. Its mission is to transport, deploy, recover and evacuate combat-loaded main battle tanks and other heavy tracked and wheeled vehicles to and from the battlefield. They can also carry construction materials and other heavy loads. The HETS is air transportable via C-5 and C-17 aircraft.