%0 Journal Article
%A Kano, Toshiyuki
%A Ishizawa, Ryuki
%A Kuitani, Takumi
%T Appropriate Operational Energy Efficiency Indicator Based on the Significance of the Evaluation for Vessels in Regular Service
%J TransNav, the International Journal on Marine Navigation and Safety of Sea Transportation
%V 19
%N 4
%P 1287-1293
%D 2025
%U ./Article_Appropriate_Operational_Energy_Kano,76,1617.html
%X In recent years, there has been a growing interest in improving energy efficiency during operations for reducing environmental impact. An indicator for evaluating operational performance, known as CII, has been proposed, but it has many issues and is currently under review at the IMO. As operational performance is strongly influenced by shippers’ transport requirements, it is important to select an appropriate energy efficiency indicator that takes these constraints into account and to verify its validity to evaluate operational performance with high reliability. Therefore, this study proposes an indicator that considers the physical implications and the influence of transport requirements, as well as a validation methodology using statistical tests. A comparative evaluation of the improvement effect of Weather Routing by applying the CII and the proposed indicator, using observed data from ferries operating daily and with a large number of voyages, showed that the evaluation by the proposed method is highly significant.
%@ 2083-6473
%R 10.12716/1001.19.04.27