During a depressurization, which sequence correctly describes actions?

• A. Don oxygen masks immediately, secure passengers, descend to a breathable altitude, and follow crew commands.
• B. Descend to altitude first, then don masks.
• C. Don oxygen masks immediately, follow crew commands, secure passengers, and descend to a breathable altitude as directed.
• D. Stay seated and wait for a full briefing.

Answer: (C)

During a depressurization, getting oxygen to everyone on board is the first and most critical step. You must put on your own oxygen mask right away so you don’t become hypoxic and impaired. Once you’re breathing normally, you can follow the crew’s directions, which include helping to secure passengers and carrying out the captain’s instructions. The descent to a breathable cabin altitude is done as directed by the flight crew, since this step depends on the aircraft’s safe operating plan and the situation at hand.

This sequence keeps you oxygenated so you can effectively assist others and act on commands, rather than delaying because you’re waiting for a briefing or trying to manage passengers before you’re protected.