The infrastructure technology under the Air Navigation Services (Thailand Modernization CNS / ATM Systems: TMCS) is a major project. the period of operation since 2010-2014 by the supply and installation of the technology. And the requirements of international air traffic management system (Global Air Traffic Management System) in the navigation links across the country to date, which is now taken,., Has sent a team of air traffic control operations. and engineering teams to air traffic services, aviation training, learning a new system. Including workshops for agencies to find a united front to plan aviation internationally under the framework for aviation in the world, called the Aviation System Block Upgrade or ASBUs to lead the integration of the development plan, the air of. Thailand in accordance with the development plan to the international aviation. This is a potential AEROTHAI. To be driven into the skies. Development of seamless airspace within ASEAN (Seamless ASEAN Sky: SAS) systems and practices in the management of air traffic in the region to have equal potential. Accommodate the volume of air traffic increases in the future.