Image Credits: ClassNK Ocean Network Express Pte. Ltd. (“ONE”) and Nippon Kaiji Kyokai (“ClassNK”) have launched a joint research project to evaluate the effectiveness of roll damping tanks (“RDTs”) on large container ships. ONE will provide onboard measurement data from its vessels, which ClassNK will analyze alongside numerical simulations to assess roll reduction performance under actual operating conditions. Through the analysis of onboard measurement data and numerical simulations, the research aims to provide practical insights into the performance of RDTs and better understand their effectiveness in full-scale operations. By optimizing RDTs’ performance, ONE and ClassNK aim to further enhance cargo safety and transit reliability, ensuring a more resilient and stable supply chain for its customers worldwide. About RDTs and Their Growing Use on Container Ships RDTs are designed to reduce a ship’s rolling motion through the controlled movement of liquid within a tank. Long established on passenger ships, research vessels, and other specialized vessels, their application to container ships has increased in recent years. Roll reduction matters for large container ships as excessive rolling can increase the forces acting on containers and their securing systems. Effective roll reduction can support safer vessel operation and cargo transportation, and can allow more efficient stowage and improved operational flexibility. Despite the growing application of RDTs to container ships, their roll reduction performance on large container ships has primarily been evaluated through model tests and numerical simulations. Full-scale verification based on onboard measurements under actual operating and sea conditions remains limited. To help address this gap, ONE, one of the world’s leading liner shipping companies, will provide operational data collected from vessels in its fleet, while ClassNK will apply its extensive expe