Airspace classification

The SESAR programme identifies only two types of airspace with respect to ATM: managed and un-managed airspace.

• Physical dimensions;
  

From a specified lower level regionally harmonised in the SESAR area, extending to an unlimited upper level. Managed airspace may extend down to ground level where service provision considerations require this, in particular around aerodromes. The dimensions of Managed Airspace will be kept to the minimum required for safe and efficient service provision.

• Internal Subdivision/organisation;

The internal design and organisation of managed airspace will be optimised to ensure the safe and efficient management of the trajectories concerned. Temporary airspace structures to protect certain types of operation will continue to exist and will be managed in co-operation between the partners concerned - e.g. military, police, General Aviation.
Managed airspace is a user preferred routing environment however where traffic complexity or the need to maximise capacity require, structured routes will be implemented. Their use will be suspended when they are not required.

Un-managed Airspace:

All airspace not designated as Managed.

Source : SESAR.