End-users are driving forces behind the development of marine science. A sustainable Research and Technological Development (RTD) system serves as a basic tool to transfer basic research to service products. Successful development of next generation marine research, monitoring and forecasting systems relies on sustainable strategy in management human, monitoring and computing resources. This paper analyses relationships between European marine research, monitoring and forecasting systems, reveals existing problems (e.g. bottle-neck effects) and highlights possible solutions in order to maintain sustainable development in these systems.