Transition level by ATC
Joined: Apr 2005
Posts: 1,652
Likes: 138
From: 50+ north
Sorry have missed something here, why are you confused? If you are operating in UK controlled airspace you will be given the QNH when you are given descent instructions which go through the transition level. No need to worry about what the current transition level is, we controllers get paid for taking this worry away from you!
Joined: Jan 2007
Aviation Qualifications: ATCO
Posts: 132
Likes: 0
From: Germany
If and when I give an altitude and QNH I expect you to use this and not 1013,2. There´s usually a reason for this. In our sectors we have an instrument approach that starts at 6000ft QNH. We clear arrivals to another nearby airport to 7000ft QNH (the same one of course) instead of FL70 at pressures of 1013 or below to a) get these guys down on profile and b) give the QNH at a convenient time. We also have special flights like photo missions flying on local QNH that require other (descending) traffic setting local QNH as well to provide separation.
Joined: Sep 2002
Posts: 2,288
Likes: 1
From: Enzed
Where does your transition layer occur, what altitude on the way up and what Flight Level on the way down?
Where I am the highest cruise altitude is 13,000' and the lowest FL is 150. So on the way up 1013 is set above 13,000 and area QNH set below FL 150. No cruising between 13,000 and FL 150.
Where I am the highest cruise altitude is 13,000' and the lowest FL is 150. So on the way up 1013 is set above 13,000 and area QNH set below FL 150. No cruising between 13,000 and FL 150.
Joined: Jan 2007
Aviation Qualifications: ATCO
Posts: 132
Likes: 0
From: Germany
TL in Germany is normally FL60 or FL70, depending on QNH. I´ve seen TL FL80 only once in fifteen years.
We use every available level in the TMA, therefore use QNH or 1013,2 as needed.
We use every available level in the TMA, therefore use QNH or 1013,2 as needed.
Joined: Mar 2014
Posts: 497
Likes: 0
From: Way north
Once leaving your flightlevel to the cleared altitude you can change your altimetersetting, you don't have to wait until passing TRL.
But I don't think the rule applies when climbing, only descending.
But I don't think the rule applies when climbing, only descending.
