What does a yellow light signal from the control tower indicate?

A yellow light signal from the control tower indicates that the pilot should prepare for takeoff or landing while proceeding with caution. This signal is part of the standard visual communication system used by air traffic control to convey critical information to pilots.

When a yellow light is displayed, it serves as a warning or advisory to the pilot to be alert and ready for any instructions that may follow. It emphasizes the necessity of maintaining situational awareness and readiness to respond to further commands, which may include either taking off or adjusting approach parameters.

In contrast, other options, such as abandoning landing approaches or requiring immediate runway clearance, do not align with the standard meaning behind a yellow light signal, which focuses primarily on cautional readiness rather than abrupt actions. It's important for pilots to understand these signals to ensure safe and efficient operations while navigating controlled airspace.