Glossary of Terms - U

Unit Load

A number of individual packages bonded, palletised or strapped together to form a single unit for more efficient handling by mechanical equipment.

Unit Load Device (ULD)

Any type of container or pallet, in which a consignment can be transported by air whether or not such a container is considered aircraft equipment.
Any type of air freight container, aircraft container, aircraft pallet with a net, or aircraft pallet with a net over an igloo.

United Nations Dangerous Goods Number (UNDG Number)

The four-digit number assigned by the United Nations Committee of Experts on the Transport of Dangerous Goods to classify a substance or a particular groups of substances.
Note: The prefix 'UN' must always be used in conjunction with these numbers.