ED Decision 2020/008/R
SYSTEM OF DESIGNATORS
The system of designators should:
(a) make a clear distinction between:
(1) departure routes and arrival routes;
(2) departure or arrival routes and other ATS routes; and
(3) routes requiring navigation by reference to ground-based radio aids or self-contained airborne aids, and routes requiring navigation by visual reference to the ground;
(b) be compatible with ATS and aircraft data processing and display requirements;
(c) be of utmost brevity in its operational application;
(d) avoid redundancy; and
(e) provide sufficient possibility for extension to cater for any future requirements without the need for fundamental changes.
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