MARIN－Roll Risk Estimator 9 August 2022 No.22-011 Tweet Download PDF (259KB) The International Group is a member of the Maritime Research Institute of the Netherlands (MARIN) Top Tier project. The project has been established to examine and assess the causes of container losses arising from at-sea incidents onboard various sizes of container ships with a particular focus on ultra large ships. The project has been approved by a cross section of industry, academic and government interests and MARIN will produce a report of its findings including recommendations in due course. It is envisaged that the recommendations will eventually lead to operational and technical improvements that should mitigate the risk and underlying causes of container losses at sea.   The International Group has received the annexed roll risk estimator [use the MARIN link for updated excel sheet to be used as an annex to this circular]. It indicates combinations of speed, heading and wave period that result in unfavourable tuning of roll motions that should be avoided. It does not give indication of the maximum roll motion and at which wave height the vessel is vulnerable to adverse rolling must be judged by the master’s experience. In addition, it does not address other dangerous ship behaviour like e.g. large vertical accelerations, shipping green water and slamming.   All clubs in the International Group have issued a similarly worded circular. For further information, please click here. Loss Prevention Circular ロスプリベンション Japan P&I News ナイロビ条約 日本 組合員限定 --> Most read News Status of Maritime Conventions (as of 1 August 2022) オランダ海事研究所（MARIN）によるRoll Risk Estimatorツールのご案内 Beware of Parametric Rolling in Following Seas－Top Tier report Related News Beware of Parametric Rolling in Following Seas－Top Tier report