생체신호를 이용한 알코올의 의한 모의항행능력 평가

Abstract

Operator fatigue is a key issue in the maritime accidents investigation. Such fatigue is caused by a lack of sleep, tight schedule, lack of rest, alcohol intake, health problems (diseases), work and boarding conditions and other various factors. Also, fatigue may produce physical and mental decrements in alertness, vigilance, and decision-making that can increase the risk of human error and result in fatalities and injuries. With a ship handling simulator, the effect of alcohol on maritime navigational performance is studied for the 3 blood alcohol concentrations levels (0.0%, 0.05% and 0.08%). The 8 participants were volunteer deck officer cadets in their senior year, at least 22 years of age, with previous experience on a bridge simulator. For baseline and performance trials, participants were randomized to one of four bridge simulator scenarios according to the current and the direction of the wind. In order to study the effects of alcohol on maritime navigational ability, 1) bio-signals using Electrocardiogram, 2) performance using a simulator, and 3) mental workload using NASA-TLX were measured. As a result, this study found that alcohol intake significantly impairs the physical and mental ability of the ship operator. In particular, alcohol intake was found to have a direct correlation with changes in bio-signals such as heart rate not to mention simulator performance. In addition, alcohol intake increased mental workload according to the subjective mental workload evaluation undertaken by the test subject. The result of the analysis in this study includes the limited quantitative measure of the effects of alcohol, which is a major cause of operator fatigue. However, this study could be used as a basis for the development of a operator fatigue model that additionally considers sleep and workload. In addition, the methodology for quantifying causes of fatigue using the proposed Ship Handling Simulator could be utilized in conducting various basic researches to