ER APP ATC 78 — Update FDP to support 4D trajectory direct segments in free routing airspace beyond local AoR

Update related systems (FDPSs) to support 4D trajectory direct segments in free routing airspace and support at ATC level the planning and execution of RBT/MBT across ACC/FIR/FAB and multiple AoRs. The 4D trajectory is the planned trajectory calculated by the ground system.
Updates to the 4D trajectory can be shared between ATC units to support decision making processes and operational procedures.
4D Trajectory data exchange will support coordination and transfer between units and extend beyond local AoR across the AoI.
4D Trajectory data exchange (ground-ground) can be achieved by use of OLDI or IOP.
Request on frequency between sector and request traffic skipping sectors (different time, different FL...) are possible.