3. Systems and procedures for air traffic services
3.1. Flight data processing systems
3.1.1. Seamless operation
3.1.2. Support for new concepts of operation
3.2. Surveillance data processing systems
3.2.1. Seamless operation
3.2.2. Support for new concepts of operation
3.3. Human-machine interface systems
3.3.1. Seamless operation
3.3.2. Support for new concepts of operation