On the Propulsion Performance Analysis of Ship in Service by the Use of AB-Log Data

Fuel saving has been becoming more important year by year not only for the cost performance but also for global environmental problems such as CO2 pollution. Appropriate ship maintenance and operation management are one of effective measures for fuel saving. In order to do that, it is necessary to monitor properly the present situation of propulsion performance of ship during her service.The paper introduces a new analyzing method of AB-Log Data from a viewpoint focusing on the relationship between transportation energy performance and AB-Log data, and shows that the new method is useful for monitoring the propulsion performance of actual ship in service.The new method mentioned above indicates that some parameters are useful for AB-Log data analysis, and that, among them, the parameter Ps/W⋅Vs3 is most informative. So, paying attention to the change of these parameters, AB-Log data analysis of 6 vessels, 2 of bulk careers, 2 of container ships and 2 of crude-oil tankers are carried out. According to the method, the analysis results show that it is possible to monitor quantitatively propulsion performance and the influence of sea conditions.