This International Standard specifies minimum performance and compatibility requirements for ground handling and transport systems equipment for air cargo unit load devices, used to service civil wide body freight aircraft. The purpose of this International Standard is not to specify equipment design, but rather to ensure interface compatibility of the various elements which might make up a complete ground handling and transport system, developed within a number of different operational schemes. This International Standard is applicable to ground handling and transport systems equipment, designed to deal with main deck unitized cargo in the form of intermodal containers and other compatible unitized load devices. In the context of this International Standard, intermodality concerns, primarily, air and land modes, but does not exclude sea mode. Likewise, compatible equipment, other than that used for main deck cargo, is not excluded.