Transition altitude, transition level and transition layer Flashcards
What’s the definition of the TA?
In the Belgium FIR, the TA (transition altitude) is a fixed value (4500 ft). It’s the altitude at or below the vertical position of an aircraft is controlled by reference to altitude.
What’s the TA for EBCI?
4500FT
What’s the meaning of TRL?
The TRL (transition level) is the lowest assignable flight level available for use above the transition altitude. It’s given to the pilot on descending when cleared to an altitude. It will “float” with the QNH: the lower the QNH, the higher the TRL.
What’s the meaning of “transition layer”?
The airspace between the transition altitude and the transition level
Transition altitude is the altitude at which the pilot
On climbing and cleared to a FL, changes the altimeter setting to 1013 hPa
Transition level is the altitude at which the pilot:
On descending and cleared to an altitude, changes the altimeter setting to QNH
While passing through the transition layer, vertical position of an aircraft shall be expressed in terms of:
Flight levels when climbing and altitude when descending
When the controller gives you the TA?
This will not been given. It’s 4500 ft in the Brussels FIR
What’s the height of the transition layer in the Brussels FIR?
It varies from 0 ft to 1000 ft depending on the QNH on that moment could be FL 45, FL 50 of FL 55
What’s the lowest flight level? Could this be FL 45?
The transition level, yes
When and how, during a controlled flight, you change your altimeter?
From QNE to QNH when passing the TRL in descend From QNH to QNE when passing the TA in climb
What’s the “regional QNH” and where it applies?
The lowest QNH of the civil and military airfields (with meteorological services) in the Brussels FIR
In which region you will be given the regional QNH?
In the Brussels FIR
What’s the lowest QNH
The Regional QNH
When in contact with Brussels Information during an uncontrolled flight, which altimeter setting you get?
The Regional QNH
