Long-duration flight missions in single-piloted aircraft are currently feasible due to increased operational capabilities of the fifth-generation aircrafts and changes in types of military operations. Air policing missions assisted by air-refueling or multiple stops can last more than 5 h, with possible extension for more than 9 h. Concurrently, prolonged engagement in operational tasks can lead to fatigue.
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Fatigue, in general, may impair a variety of cognitive skills and functions – such as degradation of accuracy and timing, multitasking (attention