What does a flashing green light signify when on the ground?

A flashing green light on the ground is a signal used primarily at airfields to indicate that a vehicle or aircraft has been cleared to taxi. Understanding this signal is crucial for maintaining safety and proper communications on the airfield, as it helps prevent collisions and ensures that all parties are aware of the aircraft's movements.

In the context of aviation operations, a flashing green light specifically instructs pilots and ground personnel that it is safe for them to proceed with taxiing. This is an important distinction in ground operations, as different lights convey different meanings in aviation protocols.

The other options refer to different situations or clearances in the flight operation phases. For example, a clear to land signal would typically be a steady green light for aircraft in approach, while a takeoff clearance is indicated differently and would not be represented by a flashing green light. Therefore, knowing that the flashing green light specifically means "cleared to taxi" is essential for safe ground operations in aviation.