What happens when using the ALIS function: Delete All ULDs?

When using the ALIS function "Delete All ULDs," the result is that all Unit Load Devices (ULDs) that have been assigned or staged for the flight are removed from the system. This function essentially clears the current load plan, making it necessary to reassess and reconfigure the ULDs for the cargo hold as needed. The primary purpose of this function is to provide a clean slate for the load distribution process, allowing operators to ensure accuracy in the cargo configuration without residual data interfering.

While the other options suggest various operations with ULDs, only the correct answer specifically pertains to the direct action of removing all ULD assignments, which is crucial when adjustments to the load are required or errors need to be corrected in the planning stage.