aerofly fs4

I use 1301, it works at 99% in Europe.

It also works in USA, but not that much than Europe.

It works in Japan for routes, but for SID and STAR something like 2101 is better. The problem is that the beginning and end of routes found with 1301 are not coinciding with 2101 SID and STAR.

Finally, I always use 1301.

Maybe that one day there will be an integrated route finder based on internal data of Aerofly whatever the mix of AIRAC.