What does an amber light illuminated on the SDU switch panel indicate?

An amber light illuminated on the SDU switch panel signifies that the SDU (Signaling Detection Unit) is discharging. This is a critical indication for personnel operating the system, as it alerts them to a specific operational state that requires attention.

In many systems, an amber light is used to indicate caution or an intermediate state that is not optimal but not necessarily critical. In this context, knowing that the SDU is discharging allows operators to prepare for possible impacts on system functionality or to take corrective action to ensure continuous operation. Properly interpreting and responding to such indicators is essential for maintaining operational readiness and safety.

Understanding this signal helps reinforce the importance of monitoring system indicators, which contribute to the overall effectiveness of the unit's functions in various operational scenarios.