Amsterdam FIR above FL 245 is defined as free route airspace (FRA). FRA is a specified airspace wherein users may plan direct routes between defined entry and exit points without reference to the ATS route network, with the possibility to file routes via intermediate waypoints.
Direct routes allow flights to use the shortest possible routes when flying in, or crossing, FRA. This includes ATC clearances that allow a direct routing through several FIRs in the FRA. FRA entry and exit points may be located within one or more FIRs (e.g. adjacent FIRs). Across FRA a single flight level orientation system shall be applied.
Direct routes in the Amsterdam FIR shall receive an ATC clearances if the following prerequisites are met: