During the short-notice time available evacuation drill, what happens at the 30-second mark?

At the 30-second mark during a short-notice time available evacuation drill, the appropriate action is for the passengers to be commanded to brace for impact. This step is critical in preparing passengers for a potential emergency situation, as it ensures that everyone is positioned to minimize injuries during the event of an actual impact. The command to brace is an essential safety measure that emphasizes readiness and communication between the crew and the passengers.

This action reflects the urgency of the situation, as it's important to ensure that all passengers are aware of their positions and ready to respond appropriately. The emphasis is on immediate response in scenarios where time is limited, guiding passengers to adopt protective positions until the aircraft has come to a complete stop or until they receive further directions from the crew.

In the context of a drill, calling out for passengers to brace helps to reinforce this critical safety procedure as part of the crew's training, ensuring that they are prepared to take command effectively in a real emergency.