What are the dimensions of the reference lights marking an additional touchdown point for cargo aircraft?

The correct answer, which specifies dimensions of 10 meters by 10 meters for the reference lights marking an additional touchdown point for cargo aircraft, aligns with established aviation standards that ensure adequate visibility and guidance for pilots during landings in various conditions. These dimensions are chosen to provide a clear and easily identifiable marker that can be used effectively in both day and nighttime operations.

Ensuring that the touchdown point is marked with a high-visibility standard helps pilots to assess their approach and land safely, especially in challenging circumstances or on surfaces where conventional markings may be less distinguishable. The size specifically selected—10m x 10m—strikes a balance between being large enough to be easily seen while not overly large to create confusion with other markings or objects in the vicinity.