What is a 'unit load device' (ULD) used for?

A unit load device (ULD) is specifically designed to consolidate cargo into a standard container or pallet, facilitating efficient transportation and handling of freight on aircraft. ULDs come in various sizes and shapes to accommodate different types of cargo, ensuring that items are securely packed and organized during air transport. This standardization not only streamlines the loading and unloading process but also maximizes the use of space within the aircraft, leading to improved operational efficiency and safety.

Utilizing ULDs allows for better weight distribution and more straightforward management of cargo, aligning with aviation regulations and best practices for air freight. The other options do not accurately reflect the primary purpose of a ULD; for example, transporting passengers is not relevant to ULDs, which are specifically for cargo management.