What does a red tower beacon signify?

A red tower beacon is commonly used in various industrial and electrical applications to indicate a specific status or alert. When it comes to switchgear and similar systems, the red color typically signifies a warning or a fault condition.

In this context, the meaning of a red tower beacon commonly relates to a situation where the system has encountered a failure or is not operating under normal conditions. Since the choice states "Auto Fail," it aligns with the typical use of a red signal to indicate that the automatic operations have failed, possibly requiring manual intervention or alerting the operator to the issue at hand.

In contrast, colors like green are usually reserved for operational statuses, while amber or yellow could indicate caution or a transitional state rather than a complete failure. Therefore, when a red beacon is activated, it is a critical visual warning indicating that immediate attention is needed.