I work as an Air Traffic Controller in Austria and i have a question regarding vertical separation of IFR flights in airspace class E within the US.
As you probably know, EASA (the European Aviation Safety Agency) started discussion about a harmonisation of european transition altitudes.
Therefor it is interesting to know, how separation is provided by the FAA to IFR flights in airspace E.
An IFR flight departed somewhere at a controlled airport and cruises in airspace E (e.g. FL100) en route to its destination aerdrome. As it started, the local altimeter setting of the departure aerodrome was set, and in the vicinity of its destination, the altimeter setting of the destination will be set - clear so far.
But which setting does the flight have during enroute flight below FL180?
And how is vertical separation done to other IFR flights with different departure and destination aerodromes (different altimeter values)?
Thanks in advance for your response!
Greetings from Vienna, Austria.
If i posted this question at the wrong section, please move my post to the correct location, thanks)