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Free Route Airspace
Lisboa FIR

The Free Route project, pioneering project in Europe, means that companies may, within Lisboa FIR (airspace zone covering the Portuguese continentL area and stretches to the archipelago of Madeira, inclusive) choose the most appropriate trajectory for the flight profile, instead of having to follow predefined routes, allowing them to shorten routes either in distance or in flight times, and consequently saving fuel and emit less CO2 into the atmosphere.
Antes 2009