NEREIDS will bring innovate capablities based on EO to make a best exploitation of available space technologies.NEREIDS capabilities will bring enhancedEO capabilities by combining different sensors with innovative data fussion tecniques.NEREIDS will bring a toolbox apporach enabling share data an capabilities and support a comon maritime piture.NEREIDS will make an analysis of maritime surveillance in a cross-sectorial approach and will bring best capabilities using best use of available space assets.