Dolly is a type of ground support equipment, used to transport specialized unit load devices (ULD). Dolly operates in the airport, using a tractor truck to pull single or group (including many dollies connected together). AESC has produced all kinds of dolly: dolly turntable swivel (dolly 5 feet, 7 feet), 10 feet dolly (flat or roller), 20 feet dolly, 40 feet. This product line is certified by CAAV. This article presents main features of dolly types that are operated at the airport.