Application Of Formal Safety Assessment (fsa) On Navigation Safety Evaluation Of The Port Waters

The vessel accidents happen occasionally with traffic density increasing greatly due to a mount of vessels navigating in port, as well as the development of ship's amount and types and tonnage becoming larger and larger with the development of the shipment. Based on these complex traffic environments, we must find out some new safety measures in port water from new perspectives.Formal Safety Assessment (FSA) is a systematic and standard comprehensive assessment method. It originates from the safety systems engineering. As a structured and systematic analysis approach, FSA firstly comprehensively analyses and identifies the dangers or hazards of system based on holism view, and then evaluate these dangers and hazards to determine its risk and severity, finally gives some effective suggestions to reduce or control such risks. This thesis introduces FSA procedure to evaluate navigable safety of port waters, and tries to find out the concrete assessment approaches of traffic safety in port waters. Especially during analyzing and identifying these factors which affects the navigable traffic safety in port waters and establishing the safety assessment models, we combine the result of long-time investigation and visit based on the specific environment, take into account all probable factors and integrate the existing theories of safety system engineering, finally we find out the evaluation indices of influencing the traffic safety. On this basis, we establish an unascertained measure precautionary assessment model of the marine traffic safety in port waters by employing the fuzzy set transformation principle and using membership function of various indices. After that, we apply this model to Qingdao port waters for evaluating the traffic safety conditions and get a quantifiable result which shows the traffic safety conditions of Qingdao port waters, finally we give some suggestions and methods to improve port traffic safety based on this result which can reduce the maritime accidents and increase efficiency of port.