Final answer:
In aviation, when no hold short lines are marked, the aircraft must remain at a safe distance from the runway edge. This distance can vary and is determined by airport regulations.
Step-by-step explanation:
In aviation, when no hold short lines are marked, the aircraft must remain at a safe distance from the runway edge. This distance is typically determined by airport regulations and can vary depending on the specific airport. It is important for aircraft to maintain a safe distance to avoid any potential collisions or interference with other aircraft or ground operations.
For example, at some airports, the standard distance for an aircraft to remain from the runway edge when no hold short lines are marked is 200 feet.
It is crucial for pilots to be aware of the regulations and guidelines specific to the airport they are operating in to ensure the safety of everyone involved.