How do flight crews typically manage fatigue on long missions?

Flight crews typically manage fatigue on long missions by employing controlled rest strategies. This approach recognizes that fatigue can significantly impact performance and safety during flight operations. Controlled rest involves taking short, planned naps during flight to help alleviate fatigue without compromising safety. These naps are strategically timed to ensure that crew members remain alert and able to manage their duties effectively.

The use of controlled rest strategies is based on research that shows brief periods of sleep can enhance alertness and cognitive function. Proper implementation of these strategies often involves scheduling where one crew member takes a break while another maintains their responsibilities, allowing for continuous operation without risking performance due to fatigue.

This method contrasts with other strategies, which may not prove as effective. Avoiding any breaks can lead to increased fatigue rather than managing it. Relying solely on increased caffeine intake may provide a temporary boost but does not address the underlying need for rest and can lead to a crash in alertness later. Flying at lower altitudes does not inherently affect fatigue management and primarily influences other factors such as cabin pressure and air quality. By integrating controlled rest, flight crews can enhance operational safety and efficiency on long missions.