A study on the judgments of collision avoidance at sea

本研究的目的是调查学生对海上避碰的判断，并阐明教育的有效性，包括对学生的避碰结果。对船舶的现场调查表明，避碰时间根据船舶尺寸的不同而不同。其次，对有经验的船长和高级船员进行了问卷调查和CG视频实验。受试者包括32名远洋服务大船体验者、33名滨海服务中船体验者和37名小轮体验渔民。结果表明，船舶尺度不同，距离视角和避碰时间也不同。还指出，如果两艘不同维度的船舶相遇，海上规则将不能如期实施。教育方案考虑到了上述结果，对学员进行了军官课程。在这些学生中，33人被分配到训练组(接受教育)，34人被分配到控制组(不接受教育)。结果表明，教育方案改变了避碰时机，以保障学生的安全。

The purpose of this study are to investigate the judgments of collision avoidance at sea and to clarify the effectiveness of education which include such results for students. The on-site survey on the ships suggested that the timing of collision avoidance is different according to ship dimension. Next, the questionnaires and CG video experiment were carried out for experienced captain and officer of the ship. The participants were 32 those of oceangoing service as a large ship experience, 33 those of coasting service as a middle ship experience and 37 fishers as a small ship experience. The results demonstrated that the distance perspective and the timing of collision avoidance are different according to ship dimension. And also it was pointed out that In case two different dimension ships encounter, the rule at sea would be unworkable as intended. Educational program taking into account the above results was carried out officer-course students. Of those students, 33 were assigned to the trained group(to receive the education), and 34, to the control group(not to receive the education). The results suggested that the educational program change timing of collision avoidance toward safety of students.