This is the recent review of author’s researches since last workshop held in Shanghai. The algorithm of automatic collision avoidance system and other functions used in Marine Traffic Simulation System (MTSS) and Imazu problem with sample simulation result using MTSS were introduced in the previous workshop. In this paper some results of free-running experiment and detail behavior or the simulation result of the same Imazu problem treated in the previous paper are introduced. Also as an application of MTSS, the marine traffic simulation of Singapore Straits are shown. Including the applications applied for southward of Tokyo Bay and off Shanghai which was treated in the previous paper, an index to assess the dangerous degree is explained. Further two new researches are introduced. One is the research related to ship accidents. Normally probabilistic approach is common for this, but the new method mainly focuses on human behaviours. The other is related to tsunami. Using AIS data, ships behaviours during the tsunamis at the East Japan Great Earthquake were observed. As for ship manoeuvrability, low speed mathematical model is explained. It will be useful of course for harbour manoeuvring, but also ship motion in current or tsunami can be treated using the model, too. Finally, some new development of automatic berthing using artificial neural network is introduced which was dome more than 10 years before. At that time, the most difficult problem is how to cope with wind disturbances and how to provide consistent teaching data. In this paper, the methods to cope for them are briefly introduced. The paper list is a kind of appendix where detail description of each section is described.