Glossary of Terms
Ultimate loadUltimate load. The limit load multiplied by the appropriate factor of safety. |
UN numberUN number. The four-digit number assigned by the United Nations Committee of Experts on the Transport of Dangerous |
Unaccompanied baggageUnaccompanied baggage. Baggage that is transported as cargo and may or may not be carried on the same aircraft with the |
Unburned hydrocarbonsUnburned hydrocarbons. The total of hydrocarbon compounds of all classes and molecular weights contained in a gas sample, |
Unclaimed baggageUnclaimed baggage. Baggage that arrives at an airport and is not picked up or claimed by a passenger. |
Unidentified baggageUnidentified baggage. Baggage at an airport, with or without a baggage tag, which is not picked up by or identified with a |
Unit load deviceUnit load device (ULD). Any type of freight container, aircraft container, aircraft pallet with a net, or aircraft pallet with a net over an |
Upper-air chartUpper-air chart. A meteorological chart relating to a specified upper-air surface or layer of the atmosphere. |
Usability factorUsability factor. The percentage of time during which the use of a runway or system of runways is not restricted because of the |