What is one effect of pilot fatigue on flight operations?

Pilot fatigue significantly increases the risk of accidents during flight operations. When pilots are fatigued, their cognitive function, decision-making ability, and overall performance can deteriorate. This can manifest in slower reaction times, decreased situational awareness, and impaired judgment, all of which can critically affect flight safety. Fatigued pilots may struggle to process information quickly or to make sound decisions under stress, making them more prone to errors that could lead to accidents.

In contrast, the other options suggest benefits or improvements that are not associated with fatigue. For instance, fatigue does not improve reaction times or enhance teamwork among crew members; rather, it typically strains these areas. Additionally, decision-making tends to become less efficient with fatigue, not more so.