FATIGUE AT SEA - A MANNING PROBLEM

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M. J. Akhtar

Abstract

Data about human and organizational factors from in-depth analysis of 93 grounding accident investigation reports are used to construct logistic regression models of human fatigue. A hierarchical model of the strongest fatigue-influencing factors in maritime transport is developed. Fatigue is most strongly influenced by less than adequate (LTA) manning levels and variable working conditions. LTA manning and Variable working conditions are shown to have strong influence on human fatigue on board. The regression models also show that officers working 12–12 shifts have a significantly higher probability of having variable work hours which in turn have a negative impact on their fatigue levels. 

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