How can you tell that cross-side RTU information is displayed?

The correct choice indicates that cross-side RTU (Remote Terminal Unit) information is displayed in amber. This color coding is essential in operational settings, particularly in aviation and control systems, as it serves a specific purpose in signaling the status of the information. Amber generally signifies caution or a warning condition. When you see information displayed in amber, it indicates that the data pertains to the opposite side of the operational systems, and there may be a need for attention or verification by the operator.

In practice, the use of amber for cross-side RTU information helps prevent confusion with other operational data, which is typically shown in other colors, such as green for normal conditions. Understanding this color coding is crucial for effective monitoring and operational safety, as it helps distinguish important data that might require additional scrutiny or alertness from the crew or operators.