What color light indicates the sterile flightdeck?

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Multiple Choice

What color light indicates the sterile flightdeck?

Blue indicates that the sterile flightdeck is in effect, meaning only essential flight actions and communications should occur. This blue annunciator is used to clearly signal to the crew that the sterile cockpit rules apply, so nonessential talk is avoided during critical phases like taxi, takeoff, approach, and landing. The color choice helps differentiate this status from other cues: green generally means normal operation, amber signals caution, and red indicates a warning or fault. By using blue for sterile, everyone recognizes it's a specific operating state that requires heightened focus.

Blue indicates that the sterile flightdeck is in effect, meaning only essential flight actions and communications should occur. This blue annunciator is used to clearly signal to the crew that the sterile cockpit rules apply, so nonessential talk is avoided during critical phases like taxi, takeoff, approach, and landing. The color choice helps differentiate this status from other cues: green generally means normal operation, amber signals caution, and red indicates a warning or fault. By using blue for sterile, everyone recognizes it's a specific operating state that requires heightened focus.

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