Abstract
At the International Maritime Organization (IMO), guidelines for reference by masters in assessing operational damage stability for safe return to port by own power or tow has been developed. To contribute to decision-making of the master of a damaged passenger ships, a method to assess the capability for safe voyage to port is proposed on the basis of the weather criterion which is used to guarantee the safety of a dead ship in intact condition in beam wind and waves. To apply the criterion to a damaged ship, a simple prediction method for the roll damping created by internal water is deduced on the basis of experimental data. Using the predicted roll damping, the prediction method for the resonance roll angle is formulated and proved the validity by roll decay tests of a model ship with flooded compartments. Then, a wind speed limitation for safe return to port of a damaged passenger ships can be calculated by the weather criterion. The results demonstrate that threshold in term of wind speed depends on ship size and water depth on flooded deck as well as damage length.
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