What must be activated to ensure safety in case of cabin pressurization issues?

To address safety in the event of cabin pressurization issues, activating the Emergency Oxygen system is essential. This system provides supplemental oxygen to both pilots and passengers when normal cabin pressurization is lost or inadequate. In situations where the cabin altitude exceeds a safe threshold, the human body can be at risk for hypoxia, which can severely impair cognitive function and physical performance.

The Emergency Oxygen system is specifically designed to deploy quickly and effectively to mitigate these risks, ensuring that crew members can maintain consciousness and control of the aircraft during an emergency descent or other critical situations. Proper use of the emergency oxygen masks enables the crew to focus on resolving the issue at hand, whether that be initiating an emergency descent or troubleshooting the cabin pressurization malfunction.

Options like backup oxygen masks are secondary measures and may not guarantee the timely delivery of oxygen needed in acute situations. Similarly, emergency flight controls and manual thrust control do not directly address the issue of oxygen supply in a cabin pressurization emergency and therefore are not the most effective solutions for ensuring safety in this context.