Implementation of Harmonised European Transition Altitude (HETA)

Jiří Frei


Since 2010 there has been a noticeable effort to implement harmonized European transition altitude (HETA). This effort resulted in establishing of several working groups. As outputs were proposed three options but no mandatory implementation rules for European countries (resp. air navigation services providers). Nowadays each country evaluates impacts of implementation of one of three proposed solutions and some countries even implement kind of harmonized transition altitude in cooperation with neighboring countries (Slovakia, Hungary and Austria). This article briefly describes the general problem in section I and II. Impacts of all three proposed options by working group on involved subjects such as crew, controllers, but also environment or safety are evaluated. The end of the article describes in details the way of implementation in Slovakia and some case studies related to altimeter setting rules in the area of common interest at the interface between FIR Prague, Bratislava and Vienna.


transition altitude; transition level; transition layer; HETA – Harmonised European Transition Altitude; aerodrome QNH; regional QNH


EASA, Advance Notice of Proposed Amendment A-NPA 2012-01 Harmonised Transition Altitude, published 20. 3. 2012

EUROCONTROL, Towards a Common Transition Altitude – A Flight Deck Perpective

(An evaluation of the impact on flight crew workload, flight deck procedures and safety implications of utilising a common transition altitude in European airspace.)

ICAO, Doc. 4444, Air Traffic Management [online]. Montreal, 2007. Available from:

ICAO Doc. 7030 Regional Supplementary Procedures [online]. Montreal, 2008. Available from:

P. Běleš, Změny pravidel a postupů, preserntation; ANS CZ, Development and planning division, procedures department, 8. 2. 2014

R. Primus, TA10K progress meeting LPS-ACG-HCL – Common TA at 10000 ft AMSL, presentation, LPS SR, Bratislava 5. 11: 2015

CAA UK, Transition altitude (TA), information leeflet, April 2015,

LPS SR, Ausotrocontrol, Hungarocontrol, CONOPS of TA10K, version 0.9

EUROCONTROL, General Issues and Information, HETA working group results, 2013


  • There are currently no refbacks.

Copyright (c) 2016 Jiří Frei

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.