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This document describes the FIR Definition structure and file formats implemented in IVAC v2.xx and can be used for the development of new FIR Definitions.
Similar to the MTL (Multiplayer Traffic Library), the FIR Definitions are maintained on a central IVAO server(s). On startup IVAC will query the central repository for new or updates to FIR Definitions and other data files used in IVAC.
There are a lot of advantages:
The user will be able to select a FIR and ATC position to use from the FIR definition.