title: Long-haul pilots use in-flight napping as a countermeasure to fatigue.
abstract: The aim of this study was to examine the effects of fatigue on the amount of in-flight sleep obtained by airline pilots during long-haul duty periods. A total of 301 pilots collected sleep/wake and work/rest data for a period of at least 2 weeks each. Fatigue likelihood, i.e. low, moderate, high, or extreme, was estimated for each duty period based on a pilot's sleep/wake behaviour prior to duty and the time of day that the duty period occurred. Participants obtained 1.8 h of sleep (i.e. 27% of their rest time) during duty periods with low fatigue likelihood and 3.7 h of sleep (i.e. 54% of their rest time) during duty periods with extreme fatigue likelihood. These results indicate that (i) long-haul pilots obtain substantially more sleep during duty periods when fatigue is likely to be extreme than when fatigue is likely to be low and (ii) long-haul pilots use in-flight napping as a fatigue countermeasure, but more could be done to increase its efficacy.
authors.affiliation: Centre for Sleep Research, University of South Australia, Adelaide SA, Australia. greg.roach@unisa.edu.au
authors.forename: Gregory D
authors.initials: GD
authors.lastname: Roach
authors.forename: David
authors.initials: D
authors.lastname: Darwent
authors.forename: Tracey L
authors.initials: TL
authors.lastname: Sletten
authors.forename: Drew
authors.initials: D
authors.lastname: Dawson
mesh_terms: D000328:Adult; D000337:Aerospace Medicine; D001359:Aviation; D005221:Fatigue / Q000517:prevention & control*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012890:Sleep; D014851:Wakefulness; D014940:Work Schedule Tolerance