I know the rules. Don’t come here telling me it’s used when an aircraft has a MTOW of more than 136 tonnes or why it’s used, etc etc [sorry if that came off ruder than intended.]
What I’m asking is this a specific thing to North America? Or is it used internationally. Because I only ever hear it used in the US in real life. , yet can’t find anything to say it isn’t used. I’m particularly looking at the UK.
Thanks for anyone who knows!