Which ALDIS lamp signal indicates a return to the starting point on the airport?

The correct signal indicating a return to the starting point at the airport is the flashing white light from the ALDIS lamp. This signal is generally used in aviation to convey various instructions between ground control and the pilot, and each signal has a specific meaning.

The flashing white light denotes a signal for aircraft to return to the starting point. In many contexts, including airports, this is crucial for guiding pilots either back to the ramp or taxiway when required, often used when there is a need for re-routing or when the pilot is directed to move back to a previous location.

In contrast, other signals such as steady green are used to indicate that it is safe to proceed or take off, while steady red signals typically indicate that the aircraft must stop. Flashing red signals can be utilized to indicate that the aircraft should give way to other aircraft or that there is an obstruction. Understanding these distinctions is essential for correct communication and adherence to airport operations protocols.