What does a steady green light gun signal signify when on the ground?

A steady green light gun signal when on the ground signifies "Clear for Takeoff." This signal is used by air traffic control to indicate to a pilot that they are authorized to take off from the runway. For pilots, recognizing and understanding the implications of light signals is crucial, especially in situations where radio communication is not possible. Upon receiving this signal, pilots can proceed with takeoff, having confirmed that the runway is clear and that it is safe to do so.

Understanding ground light signals is part of a pilot's training, as they serve a significant role in managing air traffic, particularly in busy airport environments or in instances where radio communications may fail. Recognizing these signals helps ensure flight safety and smooth operation at airports.