In an evacuation, what audible signal is used to indicate it is in progress?

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Multiple Choice

In an evacuation, what audible signal is used to indicate it is in progress?

The signal used to indicate an evacuation is underway is the evacuation horn, because it’s specifically designed to be loud and unmistakable, cutting through cabin noise to prompt immediate egress. It coordinates crew actions like door operations and slide deployment and tells passengers to exit quickly without delay. Other alerts serve different purposes—fire alarms indicate a fire event but aren’t the standard cue for evacuations, seat belt sign chimes remind passengers to fasten belts, and landing gear warnings are cockpit alerts for flight operations.

The signal used to indicate an evacuation is underway is the evacuation horn, because it’s specifically designed to be loud and unmistakable, cutting through cabin noise to prompt immediate egress. It coordinates crew actions like door operations and slide deployment and tells passengers to exit quickly without delay. Other alerts serve different purposes—fire alarms indicate a fire event but aren’t the standard cue for evacuations, seat belt sign chimes remind passengers to fasten belts, and landing gear warnings are cockpit alerts for flight operations.

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