What is the time of useful consciousness at 25,000 feet?

The time of useful consciousness at an altitude of 25,000 feet typically ranges between 30 to 45 seconds. This refers to the period during which a person exposed to a sudden loss of cabin pressure can still think critically and make decisions before becoming impaired by hypoxia, or oxygen deprivation, due to the thinner atmosphere at high altitudes.

Understanding this concept is vital for aviation safety since it underscores the importance of maintaining cabin pressure and having oxygen systems in place. At 25,000 feet, physiological effects are already beginning to manifest, and while some may believe that the time extends to several minutes, the reality is that cognitive functions and physical capability diminish rapidly after exposure.