シミュレータによる他船視覚情報からの主観的衝突のおそれについて

Abstract

In good visibility, the expert navigator can collect some efficient information through the scene of sight, and he quickly and properly chooses any dangerous vessels. Next if he recognizes that a risk of collision will exist, he alters of his course or speed to avoid the collision for safety navigation. On the other hand, the inexperienced cadets like a trainee collect some information through same scene of sight, but they are not able to quickly and properly choose dangerous vessels. They have some different cognition through same scene of sight. In this paper, some elements (distance, azimuth, aspect angle, DCPA, TCPA) to cognize a subject risk of collision are discussed, and in some experiments of the radar navigation simulator it is shown that the most remarkable cognitive difference between a deck officer and a cadet for the cognition of subjective risk of collision at a short distance below one mile.