How to determine which airspace has Reduced Vertical Separation Minimums?

[EmileG75]

I was on AK305 from Lombok to Kuala Lumpur today and saw an SQ flight pass by in opposite direction seemingly so close to us. I replayed the airspace in Flightradar24 and saw we were separated by 1000ft at 36,000ft and 35,000ft respectively - well above FL290 where I thought it should be 2000ft? Then I learned about Reduced Vertical Separation Minimum (RVSM) where separation can be 1000ft. Is there is a way to see / know which airspace uses RVSM?

[Uli_FR24]

Hi there, thank you for reaching out!

Please check out this article: it will explain some of the questions above: https://www.flightradar24.com/blog/rvsm/

[EmileG75]

Thanks so much, very useful.