HOW INCREASED MANNING AFFECTS CREWMEMBERS’ FATIGUE, MOOD, AND SLEEP PATTERNS: RESULTS OF A STUDY ONBOARD TWO U.S. NAVY DESTROYERS
Authors
Murph, Mansfield C.
Subjects
Naval Availability Factor
NAF
Navy Standard Work Week
NSWW
Comprehensive Review 53
CR53
sleep
activity levels
actigraphy
fatigue
mood
watch rotations
shiftwork
NAF
Navy Standard Work Week
NSWW
Comprehensive Review 53
CR53
sleep
activity levels
actigraphy
fatigue
mood
watch rotations
shiftwork
Advisors
Shattuck, Nita L.
Date of Issue
2019-09
Date
Publisher
Monterey, CA; Naval Postgraduate School
Language
Abstract
U.S. Navy crews were sharply reduced following the Optimal Manning Initiative of 2003. Extensive research from the Crew Endurance Team at the Naval Postgraduate School suggests that Sailors work extremely long days with little time for rest as a result. After multiple mishaps in 2017, the Navy conducted a Comprehensive Review that directed various actions be taken. One of those directives was to compare two ships, one with normal crew and one with an augmented crew, to explore how manning is related to sleep and fatigue levels. This thesis looks at levels of manning, fatigue, mood, and sleep of crew members onboard two Flight I U.S. Navy Destroyers (DDG) over the six-month course of the Basic Phase. Unfortunately, due to overall fleet manning shortfalls, the requirements necessary for a successful comparison between the two ships were not met (i.e., a significant difference in the manning level for the two ships was not achieved until quite late in the Basic Phase). Because of these challenges, all participants in the first two data collection periods were pooled to provide an appraisal of the work and rest patterns of enlisted and officers in the Basic Phase. For the final data collection period when the Fit rates differed by 8.7%, compared to Sailors on the normal ship, Sailors on the augmented ship received ~43 minutes more sleep on average (6.35 ± 1.09 versus 5.64 ± 0.88 hr/day) and had better overall moods according to Profile of Mood State scores.
Type
Thesis
Description
Series/Report No
Department
Operations Research (OR)
Organization
Identifiers
NPS Report Number
Sponsors
Funding
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.