1997 年 96 巻 p. 175-184
A project of a high speed craft, Techno-Super-Liner had been held and a prototype ship "Hishou" was constructed. A part of final experiment of "Hishou" had been executed to investigate the way of safety navigation of a high speed craft encountering with an ordinary speed ship by Ship Research Institute in 1995. The experiment was done both at sea and on our simulator. We got some subjective evaluation results for safety navigation from participants who had evaluated Hishou's safety on the experiment. Based on their subjective evaluation results, we investigated the way of safety navigation for Hishou in congested sea area and reported it in our last paper of the Japan Institute of Navigation. In this paper we carried out more detailed investigation of the subjective evaluation results. The participant mariners were classified into 3 classes which were ordinary ship's captain, officer and Hishou classes. Their subjective evaluation results were compared among 3 classes. Then it was found that Hishou and the captain classes determined their recognition of the encountering situation severer than the officer's one. As the items which had been used on their judgement of collision danger were examined by Principal Components Analysis, we found differences between captain class and officer class. By comparison between the onboard experiments and the simulators', a simulator was conceded to be an effective tool getting mariner's characteristics. Finally we offered basic criteria of Hishou's safety navigation.