What type of light gun signal would signify that you should not move?

A steady red light gun signal is used to indicate that you should not move. This signal is essential for maintaining safety and order in areas where vehicle and aircraft operations are coordinated. A steady red light clearly conveys to the operator that they must remain stationary, thereby preventing any potential collisions or accidents in high-traffic environments like airfields.

In contrast, the other light signals serve different purposes. A steady green signal means you can proceed or move safely, while a flashing white signal is typically used to indicate that you should return to a starting point or to signify that you can proceed under specific circumstances. An alternating red and green signal is used to indicate caution, meaning that you should be prepared to stop or follow instructions based on the situation. Each signal plays a crucial role in communication and safety protocols on the airfield, making understanding them vital for all personnel.