What should be determined between sunrise and sunset in relation to aircraft approaching the landing threshold?

Determining separation from preceding aircraft using landmarks is crucial for safe landing operations. During the approach, pilots and air traffic controllers must ensure that there is an adequate distance maintained between landing aircraft to prevent wake turbulence and promote safety. Using landmarks to establish these separations allows for visual tracking and situational awareness.

In the context of approaching the landing threshold, understanding the spatial relationship to known landmarks assists both pilots and controllers in managing traffic flow effectively. This practice is especially important between sunrise and sunset when visibility conditions may change and visual reference points are essential for safe navigation and spacing.

While weight and balance, visibility distance relative to traffic, and altitude clearance are all important factors in aviation operations, they do not specifically address the immediate need for separation between landing aircraft, which is paramount as they approach the runway threshold.