1998 年 98 巻 p. 235-245
In order to improve the marine traffic safety in narrow channels or inside ports and harbours, the judgement criteria must be established based on the mariners' perception of safety. In the present paper, a quantitative expression model of the mariners' perception of safety is proposed. This model takes into account two kinds of perception of safety ; one is against the structural obstacles and the other is against the encountering ships. The extraction of mariners' senses was carried out by the simulator experiments and by the questionnaires. The difference of the senses between the pilots and the captains can be reflected in the model and the expression of senses of risk averse and risk preferable are also considered in the model.