Recently there is a growing tendency that some ships have become larger, faster and more specialized than ever before. So the environment of ship operation has grown worse and collision risk will be higher especially in congested waterways or in nearby harbour areas. Collision accident of large ships often leads to serious oil pollution on the sea. To examine the cause of collision accident may be necessary to prevention against another similar new one.
In this paper, the author discusses construction of ship manoeuvring simulator system used for reproducing collision phenomenon and for examining the cause of collision accident. And a simulator experiment, based on real collision accident, has been carried out as a case study and cause of accident has been examined.