Symptoms of fatigue include:

Fatigue can significantly impact a person's cognitive and physical abilities, making it essential to recognize its symptoms in the context of aviation safety. Each of the symptoms listed plays a critical role in aircrew performance.

Slowed reaction times occur because fatigue impairs the brain's processing speed and decision-making ability, leading to a higher risk of delayed responses to critical flight situations. This could be particularly dangerous in scenarios requiring prompt action.

Difficulty maintaining situational awareness stems from fatigue's effect on concentration and attention. When a pilot is fatigued, they may struggle to effectively monitor instruments, detect changes in the environment, or keep track of multiple tasks simultaneously, which is crucial for safe flight operations.

Changes in mood are also relevant as fatigue can lead to irritability, decreased motivation, and even emotional instability. Such mood alterations can affect communication among crew members and decision-making processes, which are vital in high-stress environments like aviation.

Understanding that all these factors—slowed reaction times, difficulty maintaining situational awareness, and changes in mood—are interconnected is essential for recognizing fatigue's comprehensive impact on performance. Therefore, acknowledging that all these symptoms are present highlights the multifaceted nature of fatigue and its implications for aviators.