Common Information Sharing Environment (CISE)

An EU framework that lets maritime authorities across borders and sectors exchange surveillance data without a single central database, connecting systems used by navies, coast guards, customs, fisheries, border, and pollution-control bodies. Coordinated by the European Commission with EMSA technical support, CISE links national and EU systems (such as SafeSeaNet and EUROSUR) so a sighting held by one authority can be read by another with a need to know. It improves maritime domain awareness through interoperability, not data centralization.