What misconception do people often have about altitude and pilot impairment?

The misconception that only high altitude causes hypoxia is prevalent because many people associate hypoxia solely with extreme elevations, neglecting the fact that even moderate altitudes can have physiological effects on the body. As altitude increases, the partial pressure of oxygen decreases, which can lead to hypoxic conditions. While it is true that hypoxia becomes more pronounced at high altitudes, it can also occur at lower elevations, particularly if a pilot is flying without supplemental oxygen.

Understanding the full range of circumstances under which hypoxia can arise helps pilots take appropriate precautions, such as utilizing supplemental oxygen or monitoring their physiological responses while flying at lower altitudes. Recognizing that hypoxia is not limited to high altitudes is crucial for ensuring the safety and performance of pilots in varying flight conditions.