Implementing Free Routes – DANUBE FAB

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Danube Fab asked us to help determine whether the same levels of safety and performance could be maintained when extending Free Routes from night-time to 24-hour implementation in the Danube Fab airspace.

Combining skills, experience and expertise

Bringing together 22 ROMATSA and 14 BULATSA controllers and five Romanian Airforce and two Bulgarian Airforce military controllers, we ran four simulation scenarios using different traffic samples. By working closely together, we successfully proved that FRA could be expanded if controllers were supported with a set of advanced ATC tools.

Careful analysis using diverse sources

To collect the most comprehensive feedback possible, we used questionnaires, debriefings and interviews complemented by data from the simulator recordings to analyse controller performance (workload and situation awareness), operational issues and the usability of the advanced ATC tools.

Providing targeted advice based on hard data

We were delighted to be able to provide 18 recommendations based on the validation of the eight RTS objectives including maintaining safety levels, increasing horizontal flight capacity, achieving optimised civil-military coordination and ensuring effective ATC tool support.

At a glance

sectors covered

simulation exercises

per exercise

controllers involved

For a copy of the final report, please contact us.

Mihail Tsenkov

Mihail Tsenkov


“We managed to simulate our entire Functional Airspace Block … The real-time simulations are very useful to minimising the implementation risks.”

Daniel Harea

Daniel Harea


“The EUROCONTROL team was very committed to implement our requirements… I was amazed about the flexibility of the platform.”

Questions about validating Free Routes or any other ATM concept? Don’t hesitate to get in touch.

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