During an emergency call from the flight deck, which combination of visual and auditory signals indicates urgency?

The combination of a flashing red light and three hi/lo chimes signifies a high level of urgency in an emergency communication from the flight deck. The flashing red light is a universal indicator of caution or emergency, alerting ground crew and personnel that immediate attention is required. The specific auditory signal of three hi/lo chimes enhances this urgency by providing a clear and distinct sound pattern that is easily recognizable and prompts a rapid response.

In emergency situations, it's crucial that the signals effectively convey the seriousness of the situation, and the choice of this combination fulfills that requirement. The flashing red light captures attention visually, while the sound signals reinforce the need for quick action, ensuring that ground personnel can quickly respond to the emergency call. This coordinated use of visual and auditory signals helps maintain safety and efficiency during critical moments.