Single European Sky (SES) project was initiated by European Parliament and EU with the aim to create a common unified upper airspace instead of the existing state-border oriented airspace architecture. It is meant to facilitate accommodation of traffic flows, enhance overall flight safety, improve airspace capacity and ATM efficiency.
The project is going to be implemented in several steps. European Commission is appointed as the body responsible for the SES project implementation; legally the mandate to do the
job is handed over to Eurocontrol.
On 20 April 2004 the European Parliament and European Council adopted SES base regulations: Frame Regulation, Airspace regulation, Air Navigation Service Provision regulation, Interoperability regulation.
The SES I regulation adopted in 2004 did not bring anticipated results in the critical spheres.
Changes to SES II package entered into force on 20 July 2009, by regulation PE-CONS 3640/09 of European Parliament.
SES II principles are implemented through legal acts of different levels, – they contain significant changes in air traffic management, infrastructure in use, implementation schedule, established goals and their measurement. They have a certain effect on the ATM business environment; right now SES legal acts, standards and plans are far from being ready – they are added to regularly updated Business Plans and taken into account when preparing annual budgets.