Abnormal FLs not reflected into SB

Hi all, I am a virtual controller on Vatsim in the Adria region. And am posting this as an observation I have made when issuing clearence for flights that have filed via SimBrief.

For flights entirely within the LYBA FIR (Serbia, Kosovo, and Monetengro). Flights do not typically observe the semi-circle rule when flying specific routes. For example, flights on the Beograd-Podgorica route will often cruise at and odd level, this is due to a number of factors such as the very strict STAR procedures required within Montenegro (Almost all arrivals are Eastbound with the exclusion of Beograd and Istanbul) as well as a lack of radar coverage in the area.

I would just like to note that I am not expecting the Navigraph team to do hours of research on the correct Flight Levels for each individual route. But I thought that it was a useful bit of information that will increase realism for the pilots who wish to make their simming experience just that bit more authentic.
Cheers all,


There are many places in the world where the direction of flight rules differ, some are oriented N/S (vice E/W), and then as you note some local variation in your area.

A complex world.

  • Orest
1 Like

Hi, thanks for the info! Currently I am not able to override the AIRAC FIR cruising altitudes on a per route basis, but will keep it in mind if this becomes possible in the future.

Best regards,