Where does the touchdown zone of the runway begin and end?

The touchdown zone of a runway is a critical area for pilots during landing, as it represents the section where they should ideally touch down for optimal landing performance. In the context of the options provided, the touchdown zone typically begins at the threshold of the runway and extends a certain distance to facilitate safe landings.

The correct answer identifies that the touchdown zone encompasses the first 3,000 feet beginning at the threshold. This distance allows for a substantial area for the aircraft to establish a stable descent and makes it possible for effective braking and landing dynamics to occur. By having a defined touchdown zone of this length, regulations and procedures are in place to enhance safety, allowing pilots to account for factors such as runway conditions and aircraft performance.

In contrast, shorter touchdown zones, such as 1,500 feet or 2,000 feet, may not provide enough space for certain aircraft types and landing conditions, which could lead to increased risks during landing. The full length of the runway might imply a misleading interpretation, as it suggests that the entire runway should be regarded as a touchdown zone, which is not the case in most operational standards.