Following the recent reprocessing of ERS and ENVISAT wave mode data and the preparation of Sentinel-1 ocean science objectives, the European Space Agency (ESA) is seeking to promote a wider use of wave measurements derived from all existing remote sensing sources including altimeters (ERS, ENVISAT and others), SARs (ERS, ENVISAT and others), and future instruments. At the same time, many new users are asking for wave data (renewable energies, Integrated Coastal Zone Management, ?) who need a global picture on the existing data, availability and quality. Accordingly, there is an opportunity to improve the combined use of numerical model outputs, in situ and remote sensing data, to advance in calibration/val idation investigations and to develop methodologies merging all separate sources of wave information. Using the full potential of all this data for different marine applications requires a multi-mission multi-sensor combination of the measurements, likely including in situ observations and numerical model results. Given the high value of such products, the economic model that may sustain a better use of data has also to be discussed.