What is the definition of 'landing distance'?

Landing distance refers specifically to the distance an aircraft requires to come to a complete stop on the runway after touchdown. This measurement is crucial for ensuring that the aircraft can safely land within the available runway length, taking into account various factors such as aircraft weight, weather conditions, runway surface, and braking effectiveness.

The importance of understanding landing distance lies in its ability to determine whether a runway is suitable for landing based on an aircraft's performance characteristics. Pilots use this information to make informed decisions during both flight planning and approach phases.

In contrast, the other options do not accurately capture the essence of landing distance. For example, the distance required for a safe landing approach focuses on the vertical and horizontal alignment of the aircraft in its descent rather than the actual stopping distance. Similarly, the distance required for a go-around maneuver pertains to a different phase of flight where the aircraft is aborted from landing and needs to gain altitude, while the distance from the landing threshold to the runway end relates more to runway dimensions rather than operational performance after landing.