When computing weights, what does Basic Empty Weight refer to?

Basic Empty Weight refers to the weight of the aircraft without any usable fuel or payload; it includes the airframe, engines, and all the necessary equipment that is permanently installed in the aircraft. This means it accounts for the weight of the aircraft in a ready-to-fly condition but does not include fuel, passengers, or cargo. Understanding Basic Empty Weight is crucial for pilots and flight planners as it forms the basis for calculating the total weight of the aircraft when planning flights, ensuring that weight limitations are adhered to for safe flight operations.

The other options do not correctly represent the definition of Basic Empty Weight: the maximum payload option incorporates cargo and passengers, while the useable fuel and crew options additionally include extra weight that Basic Empty Weight does not account for.