Answer :
Final answer:
The correct option is (c), which is "Landing runway.". A displaced threshold indicates the portion of the runway beyond the displaced threshold that is available for landing, which is crucial for ensuring safety by allowing aircraft to clear obstacles during the final approach phase.
Explanation:
The correct option is (c), which is "Landing runway.". The question asks, What does a Displaced Threshold indicate? A displaced threshold on a runway is a portion at the beginning of the runway that is not available for landing but can be used for takeoff and roll out after landing.
This area is often displaced from the actual beginning of the runway due to obstacles or to provide a safer landing approach, allowing aircraft to clear obstacles during the final approach phase of landing. Therefore, when considering the options provided, the correct answer is (a) Available landing runway, indicating the portion of the runway beyond the displaced threshold that is available for landing.
The concept of a displaced threshold is integral to understanding airport runway operations, especially in terms of landing procedures. The Federal Aviation Regulations (FAR) describe the landing field length for aircraft, accounting for obstacles and needed safety margins during landing, which aligns with the purpose of a displaced threshold to ensure safe landing operations.
