Validation of added resistance in waves by tank tests and sea trial data

ABSTRACT With the start of the EEDI (energy efficiency design index for new ships) regulations by the International Maritime Organization, a review of the analysis method for speed/power trials was required. The International Towing Tank Conference (ITTC) Specialist Committee on Performance of Ships in Service has conducted a review since 2011. For wave correction in speed/power trials, various methods were validated to improve correction accuracy during the activities. In this paper, the process of validation and implementation of the wave correction method discussed through the committee is shown. The comparison based on the results of tank test in regular waves, tank test in long-crested irregular waves and speed/power trials of full-scale ships has been examined. From the studies, the features of each method of wave correction are understood, which is helpful for the implementation of the wave correction performed in speed/power trials.