Crew factors in flight operations IX: effects of planned cockpit rest on crew performance and alertness in long-haul operations

A NASA Ames Research Center study (NASA Technical Memorandum 108839) examining the effectiveness of a planned cockpit rest period in improving alertness and performance during long-haul flight operations. By Rosekind and colleagues. A foundational piece of evidence on planned napping as a fatigue countermeasure in safety-critical work.