A unit loadA single unit of an item or multiple units being m... device (ULDSee Unit Load Device (ULD).) is a palletA flat (usually wooden or made of composite materi... or container(1) A box, typically 10 to 40 feet long, which is ... used to load luggage, freightGoods being transported from one place to another...., and mail on wide-body aircraft and specific narrow-body aircraft. It allows a large quantity of cargoA load of materials being transported by a vehicle... to be bundled into a single unit.