MIL-T-81041, MILITARY SPECIFICATION, TRACTOR, AIRCRAFT TOWING, GED, 4X4, 4-WHEEL STEER, 30,000 POUNDS DRAWBAR PULL, PNEUMATIC RUBBER TIRES, TYPE TA-30 (20 MAY 1964) [S/S BY NAVAIR DWG 1771AS100]., This specification covers two types 4x4, four-wheel steer, pneumatic tired, GED tractors intended for use as an aircraft towing and spotting vehicle for large aircraft.