What is a potential outcome of rapid decompression?

The potential outcome of rapid decompression leading to decreased useful time of consciousness is attributed to the sudden drop in cabin pressure that causes a corresponding drop in the partial pressure of oxygen available for breathing. When a cabin experiences rapid decompression, the oxygen levels may fall quickly to a point where hypoxia (insufficient oxygen) becomes a serious concern.

This situation can critically affect a person's ability to think clearly and perform necessary tasks, as the brain is highly sensitive to oxygen levels. The useful time of consciousness may be measured in seconds to minutes depending on the altitude and the individual’s physiological response to hypoxia. Thus, understanding the effects of rapid decompression is vital for safety procedures and emergency protocols during flight.

The other options do not accurately describe outcomes of rapid decompression. For instance, immediate cabin flooding suggests an influx of air or water which does not occur in decompression scenarios. Increased cabin pressure contradicts the core definition of decompression, where pressure decreases, and enhanced passenger comfort is not a realistic expectation during such a stressful and dangerous event.