ATS.TR.130 Determination of the
transition level
Commission Implementing Regulation (EU)
2020/469
(a) The appropriate air traffic services unit shall establish the transition level to be used in areas where a transition altitude is established, for the appropriate period of time on the basis of QNH (altimeter subscale setting to obtain elevation when on the ground) reports and forecast mean sea level pressure, if required.
(b) The transition level shall be located above the transition altitude such that at least a nominal 300 m (1 000 ft) vertical separation minimum is ensured between aircraft flying concurrently at the transition altitude and at the transition level.
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