What announcement should the PIC make for a post-depressurization situation?

In a post-depressurization situation, the announcement that the Pilot in Command (PIC) should make is primarily focused on ensuring proper communication and readiness between the cockpit and the cabin crew. The announcement for the In-charge flight attendant to report to the flight deck is crucial, as it allows the PIC to gather critical information about the cabin environment, including the condition of the passengers and any immediate actions that may need to be taken.

This communication ensures that the flight crew is aligned and can effectively manage the situation, particularly in an emergency. The flight attendants play a vital role in monitoring the passenger response to the depressurization and can relay observations to the PIC to aid in decision-making.

In contrast, the other announcements might not accurately address the specific needs of the situation. Preparing for landing or emergency evacuation may not be immediately warranted without first assessing the circumstances post-depressurization. Instructing passengers to remain seated could be relevant but does not facilitate the direct communication necessary for ensuring the safety and security of everyone on board in this scenario.