Operational measures in second generation intact stability criteria: effect of source of environmental data

The framework of second generation intact stability criteria allows designing a vessel for a specific operational area, by embedding area-specific environmental conditions. However, MetOcean data are generally available from multiple sources, with a corresponding source-related variability. This variability eventually reflects in the results of stability assessment, to an extent that is yet to be explored. To provide a quantitative indication in this respect, the paper presents a preliminary study considering the Mediterranean Sea as operational area. Different sources of MetOcean data are used and L1 and L2-C1 vulnerability criteria for parametric rolling are applied to a sample ship.