Final answer:
The purpose of a flashing green light gun for aircraft is to indicate that the aircraft is on the ground.
Step-by-step explanation:
The purpose of a flashing green light gun for aircraft is to indicate that the aircraft is on the ground.
This light gun is used by ground personnel to communicate with pilots, especially in situations where radio communication may not be possible.
The flashing green light signal is recognized internationally and is an important means of communication between ground crew and pilots.