Safety assessment with marine casualty data on collision accidents between fishing vessels and cargo vessels

An analysis methodology is proposed according to the guidelines for Formal Safety Assessment approved by IMO. Variation Tree Analysis, Database Analysis and Event Tree Analysis are applied to the marine casualty data on collision accidents involving fishing vessels and cargo vessels. Trial calculations of probabilities are attempted with the ship traffic survey to proceed with risk assessment and cost benefit analysis. The results of analyses and calculations indicate that the proposed analysis methodology is effective to safety assessment focused on human factors.