There currently exist three systems for flight level determination which are not compatible with one another. In the interface areas safety is compromised.
IFATCA Policy is:A global solution shall be developed using one system of flight level determination. The interface in the transition areas between different systems shall be properly managed with the introduction of procedures which will prevent the selection of the incorrect flight level. The introduction of compatible procedures in the interface areas shall be coincident with the introduction of RVSM. Simple and clear phraseology shall be introduced where metric flight levels are used. |
| See: WP 96 – Tunis 1996, Resolution B37 – WP 61 – Virtual 2022 |
Last Update: July 20, 2022
November 4, 2019 822 Jean-Francois Lepage ATS