The central objective of this study was to determine whether crew members are experiencing unacceptable fatigue levels while sailing under Exemplar crew reductions. This study was conducted aboard the CG Cutter MUNRO (WHEC-378 foot) during a patrol from Tokyo, Japan to Pearl Harbor, Hawaii. Daily evaluations of alertness and of the stability of the sleep/wake cycle were used to characterize fatigue levels throughout 30 consecutive days on patrol. Fourteen crew ...
Rapid travel across multiple time zones often results in fatigue, sleepiness, insomnia, and poor mental performance. These symptoms, in addition to others, often are known as jet lag or desynchronosis. Melatonin, an endogenously occurring hormone, has been shown to be capable of resynchronizing circadian rhythm disruptions and inducing sleep in humans, and therefore can be effective in preventing sleep loss and maintaining alertness during travel. However, in females, melatonin has ...
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