IFATCA takes the view that SI (Système International d’Unités) is not necessarily providing a single solution for Civil Aviation, and that, in order to obtain a common global standard which is necessary for safety reasons, then specific non SI elements should be retained for the measurement of Vertical Distance, Speed and Distance.
IFATCA Policy is:For the measurement of vertical distance, speed and distance the following units of measurements should be used:
* long distance used in navigation generally in excess of 4000 metres. Any change in use of current units of measurement should only be implemented after appropriate training of controllers. |
See: WP 100 – Marrakech 2000 |
Last Update: July 20, 2022
November 4, 2019 714 Jean-Francois Lepage ATS