Single European Sky
Issues related to airspace capacity surrounding Europe's largest airports reached a peak in the late 90s. After studying airspace capacity and efficiency in the US and Europe, the EU agreed on an enhancement program with the goal of creating a “single sky” in Europe - Single European Sky (SES).
Delays in airspace and at airports are expected to be a major problem even in the future. This is mainly due to national isolation – Europe's airspace is fragmented in comparison to the United States. The SES program aims to create an airspace independent of national borders within the EU, with a harmonized framework for civil and military air traffic.
The projected development requires a transition to area navigation with an extensive technical renewal of navigation equipment in aircraft and traffic management systems. The 50 (estimated) area control centers (ATCCs) in Europe today are expected to be reduced to between seven and ten over the next 20 years..