This International Standard specifies the design and performance of unit load devices (ULD) for transportation of horses on suitably equipped aircraft. Each ULD may be designed to accommodate one or more horses. It specifies minimum requirements for horse stalls to maintain a structurally safe operation and protect aircraft from corrosion created by waste spills. It provides for two types of unit. Type 1: Airworthiness Certified Structural Unit, complying with ISO 8097, appropriate to the base size. Type 2: Non-certified unit, designed for use with certified pallet and net, or straps which envelop the horse stall. NOTES 1 In the absence of International Standards dealing with transportation of horses by air, consideration should be given to national or local regulations or codes of practice. 2 The air transportation industry, under the aegis of IATA, publishes packaging standards and handling procedures through their live animals regulations (see ref. [5] which include requirements for horses. 3 IATA also defines a range of maximum contours for ULDs which should be taken into account. These are shown in the IATA ULD Technical Manual[6]. 4 The metric equivalents for dimensions have been rounded up or down to the nearest millimetre, except for critical dimensions. Masses have been rounded up to the nearest kilogram.