As you can see, as I enter Bahrain’s FIR, it says to descend to FL140. Then, once I get into Jeddah, I climb back to FL340.
Any idea why? Is this realistic? Is there some kind of airspace restriction in Bahrain?
Really good question I experienced the same for some regions all over the globe. Sometimes it affects speed as well. No idea why.
It makes absolutely no sense to me, why should a plane descent to such an alt while at cruise. That’s inefficient.
Hello @InfiniteFlightDeck how are you? It’s happened to me too. When I reported it here I was told it was a bug. What would I suggest. Entering navigraph support it has a simbrief tab. Ask this question and I think they should know why. They are very considerate.
Ah! Come back here if you have any news about this 😉👍
Hello @InfiniteFlightDeck , how are you? I took the liberty of taking your example and asked in Navigraph and got this answer from the simbrief developer:
"Hi, it’s due to an airway restriction. Normally trying a different route will fix it.
In this particular case, L768 is restricted to FL145. but only on the default (outdated) AIRAC cycle. Cycle 2110 no longer has that restriction and would not have caused a step-down.
Best regards"
I’ll leave the dialogue link with him. I hope I helped you and I’m sorry for anything.
With Infinite flight FPL converter, it tells me whenever I’m above China or Mongolia to be at an extra 100 feet in altitude for cruise, for example, 35,100. Is that the rules over there?
Hello @Skonert. 'm not sure, but I believe there is some restriction in this location you are referring to. An observation when you go to see the restriction, try to search within the airac cycle that you made the plan. I believe this helps.
China uses metres, rather than feet, when issuing altitudes. The extra 100 feet you’re seeing is the conversion from the issued altitude in metres to feet.