Variable Division Flight Level (vDFL) increases airspace efficiency

In order to more efficiently manage air traffic, a Variable Division Flight Level (vDFL) was introduced in most of the MUAC airspace. This concept allows a flexible distribution of traffic between upper and lower sectors, for example by lowering or raising the division flight level in order to match changing traffic patterns throughout the day.

vDFL is the first step towards the introduction of the dynamic sectorisation concept for the Single European Sky ATM Research (SESAR). With vDFL it is possible to tactically and dynamically make the sector size fit with the traffic load predictions – and better distribution of traffic means that airlines can be offered the option to fly at their optimum level as less traffic is restricted to a level below the high sectors.