Which of the following describes ASDA?

ASDA, or Accelerate-Stop Distance Available, is defined as the length of the take-off run available plus any stopway that may be present. This measurement is crucial for pilots because it determines the distance required for an aircraft to accelerate to take-off speed and, if necessary, come to a complete stop within the distance available.

In practical terms, if a pilot needs to abort the take-off after reaching a certain speed, the ASDA gives them a clear indication of whether they can safely stop the aircraft before the end of the runway. Understanding ASDA is essential for safe flight operations, especially when evaluating runway lengths and conditions prior to takeoff.

Other definitions presented do not accurately capture the essence of ASDA; the total length from take-off to landing, the total distance needed for an aircraft to accelerate, and the distance available for landing and taking off describe different aspects of runway parameters and performance metrics but do not specifically refer to the combination of take-off run available and stopway.