AMC1 SECTION III — (a)(1)

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.