This report provides an overview of all Member State Coastal Systems (MSCS), assesses the current status of biogeochemical (BGC) mapping and describes the newly implemented nesting methods per MSCS. The document is structured to provide an overview of the wide array of newly implemented nesting techniques and the MSCS in which they are applied. Section 2 provides an overview of all MSCS used throughout the FOCCUS project, both in a summary table and through individual fact sheets. Section 3 provides the outcomes of subtask 6.1.1, where the frequent users of biogeochemical models describe how CMEMS BGC products are currently implemented and share recommendations on how to improve this. Section 4 describes the wide variety of newly implemented ways in which the connection between MSCS and CMEMS is strengthened through new nesting techniques.