Replace the current operational CAUTRA System for ACC and Major APP, by a modern SESAR compliant interoperable line of product, to increase DSNA Performance, Support the implementation of the European ATM Master Plan for France and of the SESAR concept, Respect the Single European Sky (SES) and FABEC rules, Switch to “stripless” environment and up-to-date technologies, Reduce total cost of ownership, by sharing development and evolution costs and risks for the new system, with ANSP partners.