How are the flight control surfaces and hydraulic systems displayed during normal operation?

In the context of displaying flight control surfaces and hydraulic systems during normal operation, the correct choice is indicated by the color green. This color typically signifies that the system is functioning within normal parameters, indicating good system health and readiness.

When a system operates normally, the use of green as an indicator is standard across many aircraft displays, signaling to the pilots that they can rely on the functionality of those systems. This color-coding helps ensure quick recognition of system status at a glance, which is critical for flight safety and situational awareness.

The other color options represent various conditions or warnings. For instance, red is often used to indicate malfunctions or critical issues that require immediate attention, while yellow could indicate caution or potential limitations. A white crosshatch generally signifies a non-operational or safety-related status. In contrast, green confirms that the system or surface is operating correctly, allowing the crew to focus on flying the aircraft without concern for the affected systems.