Exterior Lights, Looking for a Pro's Perspective/Knowledge

[1854394 (Dominick Atanasio)]

@810809

Just do add: this is from the point of view of operators from the US/North America, since your TA/TRL is 18,000ft/FL180.

From what I understand, outside of the US, transition altitude varies greatly? Is it regional, based on the ATC, or even more varied than that?

[810809 (Andreas Fuchs)]

@1854394

From what I understand, outside of the US, transition altitude varies greatly? Is it regional, based on the ATC, or even more varied than that?

Yes, correct. TAs can be as low as 2500 feet! Hence the rule “below FL100/10,000 feet or below transition altitude/level”. This caters for countries with TAs/TRLs below 10,000 feet and also for TAs/TRLs above 10,000 feet.

[1854394 (Dominick Atanasio)]

Thanks Andreas