Fiscal Year	2019
Division	Graduate School of Operational & Information Sciences
Department	Operations Research
Investigator(s)	Shattuck, Nita L.
Sponsor	Naval Medical Research Center (Navy)
Summary	Crewmember fatigue and shiftwork practices continue to be a matter of concern for the US Navy and have been the topic of investigation by the Navy and US Congress. From our research, we know that certain watchbills exacerbate exiting crew fatigue problems, extend the length of working hours and degrade crew performance. This study will continue to assess workload, mood, sleep patters, daytime sleepiness and psychomotor vigilance performance of crewmembers working on various circadian watchstanding schedules. Over the past 17 years, we have studied the work and rest patterns of USN sailors in various shipboard environments. Information is still missing about several of these watchbills, in particular, the fixed 4/8 circadian watchbill. This study will allow us to fill in the gaps in our understanding of Sailor performance and its relationship to watchbills used in the US Navy.
Keywords	Circadian watchbills Fatigue Human Performance Sleep Deprivation
Publications	Publications, theses (not shown) and data repositories will be added to the portal record when information is available in FAIRS and brought back to the portal
Data	Publications, theses (not shown) and data repositories will be added to the portal record when information is available in FAIRS and brought back to the portal