The first case study has a national scope and involves a wide variety of the maritime activities identified in the main report. The second case study is concentrated around one specific activity/subject and has a transnational scope. The first case study concerns the economic benefits of MSP in Portugal. .... The second case study concerns the development of a transnational electricity grid between Belgium, Denmark, France, Germany, Ireland, Luxembourg, the Netherlands, Sweden and the UK. The development of this grid has significant benefits.