Which declaration assists in determining which runway to use for a landing?

The declaration that assists in determining which runway to use for landing is based on the shortest of TORA (Takeoff Run Available), ASDA (Accelerate-Stop Distance Available), or LDA (Landing Distance Available). This is crucial because it directly relates to the aircraft's performance characteristics and its ability to safely stop or land on a given runway.

Using the shortest available distance among these measurements ensures that a pilot selects a runway that can accommodate the specific requirements of the aircraft being operated. For instance, if the available runway length is less than the TORA or LDA, the aircraft may not be able to land safely within that distance. In situations where multiple runways are in play, knowing the shortest distance helps pilots assess which runway offers the safest landing scenario, facilitating effective decision-making regarding aircraft performance, weight, and environmental factors.

Other considerations, such as runway conditions or preferences, play a role but do not hold as primary importance in this specific context of operational safety. The focus here is on quantifiable distances that directly correlate with the capability of the aircraft and ensure its safe operation.