The Electronic Navigation Research Institute (ENRI) held its thirdãInternational Workshop on ATM / CNS in 2013 with the theme of "Draftingãthe future sky". There is worldwide activity taking place in the research and developmentãof modern air traffic management (ATM) and its enabling technologies inãCommunication, Navigation and Surveillance (CNS). Pioneering work is necessary to contribute to the global harmonizationãof air traffic management and control. At this workshop, leading expertsãin research, industry and academia from around the world met to shareãtheir ideas and approaches on ATM/CNS related topics.