Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instruction, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188) Washington DC 20503. AGENCY USE ONLY (Leave blank) REPORT DATE September 2002 REPORT TYPE AND DATES COVEREDMaster's Thesis TITLE AND SUBTITLE:The 12a. DISTRIBUTION / AVAILABILITY STATEMENTApproved for public release, distribution is unlimited. 12b. DISTRIBUTION CODE ABSTRACT (maximum 200 words)This study explores the effects of reversing the work-sleep schedules of the crew aboard the USS JOHN C. STENNIS. It also reviews current research in the field of sleep deprivation and the resultant performance decrements in humans. The results of the study indicate that a significant number of sailors have difficulty adjusting to working nights and sleeping days. Additionally, the study finds that individuals working topside have greater difficulty adjusting to the reversed schedule than do their counterparts who work belowdecks. Using a validated model of human performance and fatigue, we demonstrate that the level of fatigue and sleep deprivation observed in this study population significantly reduces individual effectiveness. The recommendations address the need for educating military personnel on the subject of fatigue and sleep logistics, possible fatigue countermeasures, and the need for further research on this topic. NUMBER OF PAGES 169 SUBJECT TERMS ABSTRACTThis study explores the effects of reversing the work-sleep schedules of the crew aboard the USS JOHN C. STENNIS. It also reviews current research in the field of sleep deprivation and the resultant performance decrements in humans. The results of the study indicate that a significant number of sailors have difficulty adjusting to working nights and sleeping days. Additionally, the study finds that individuals working topside have greater difficulty adjusting to the reversed schedule than do their counterparts who work belowdecks.Using a validated model of human performance and fatigue, we demonstrate that the level of fatigue and sleep deprivation observed in this study population significantly reduces individual effectiveness. The recommendations address the need for educating military personnel on the subject of fatigue and sleep logistics, possible fatigue countermeasures, and the need for further research on this topic. vi THIS PAGE INTENTIONALLY LEFT BLANK vii
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