Metric Altitudes
Not a "pet hate", but what is the correct way to announce your level when flying a metric altitude in, say China.
C/S "ABC123 maintaining FL8100 meters" just doesn't sound quite right!
I just say I am maintaining 8100 meters (no FL prefix) but as I note all the operators out of Hong Kong talk of being at a metric Flight Level I assume they are correct, but are they?
Thanks in advance.