What does a red light indicate in the ETVS system?

In the ETVS (Electronic Tracers Verification System), a red light is an indication of a critical status concerning the system's functionality. When the red light is illuminated, it signifies that the system is non-operational, meaning that there is a significant failure or issue that prevents it from performing its intended functions.

This status requires immediate attention, as it indicates that the system cannot be relied upon for its operations and may affect overall performance and safety. A red light is a universal signal used in many systems to alert users to serious problems or malfunctions, emphasizing the need for investigation and remediation.

Understanding this indicator is crucial for maintaining safety and efficiency within the context of the ETVS system. It distinguishes itself from other states signaled by different colors, like operational statuses or maintenance needs, where a red light does not represent an operational capability or a minor issue but a complete breakdown of functionality.