Development of a Filtering Method for Evaluation of Performance in a Calm Sea Based on Onboard Monitoring Data

Evaluations of ship performance in actual seas based on onboard monitoring data have been widely conducted recently. Performance in a calm sea is important for estimating performance in actual seas. In order to estimate performance in a calm sea, onboard monitoring data should be filtered by certain items and criteria. This filtering procedure is important and difficult because the data depend on the filtering items and criteria, and the appropriate items and criteria will be different depending on the ambient condition and ship size. To solve this problem, this paper proposes a filtering method called the Resistance Criteria Method (RCM) using the estimated added resistance in actual seas. The method was validated with a tanker (VLCC) and compared with other filtering methods.