What does a steady green light gun signal from ATCT signify?

A steady green light gun signal from the Air Traffic Control Tower (ATCT) indicates that an aircraft is cleared for takeoff. This signal is used primarily for pilots who may not have radio communication capability or for visual confirmation of clearance, especially in situations where the pilot can see the control tower. The green light serves as a clear and unambiguous signal that the aircraft can safely leave the ground.

In contrast, other signals have different meanings; for instance, a steady red light typically indicates that a pilot should stop, and a green flashing light can indicate that the aircraft is cleared for taxi. Understanding these signals is crucial for maintaining safety and ensuring proper communication in the busy environment of an airport.