Fuzzy identification method for collision risk assessment of multi-ships encounter situation

In collision risk assessment between ships, there are many good methods suitable for two ship encountered situation. But in multi-ships encouter situation, because there is not clear guidance in the International Regulations for Preventing Collision at Sea, the action taken to avoid collison is complecated. It further makesthe assessment of collison risk in muilti-ships encounter situation difficult. In view of the multi-ships encounter situation authors apply fuzzy identification method for collision risk assessment. It shows that the method is reliable and practical for application.