The heavy expanded mobility tactical truck(HEMTT) comes in five configurations, designed for different combat-support missions. The M978 tanker refuels tactical vehicles and helicopters in forward locations. The M983 tractor tows the trailer-mounted MGM-31 Pershing and MIM-104 Patriot missile systems. The M984 recovery vehicle uses a lift-and-tow system to recover disabled vehicles in two-to-three minutes. The M977 and M985 cargo trucks carry all types of equipment, especially ammunition. All but the tanker have optional material-handling cranes at the rear of the vehicle.
