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identification of the radio navigation aid. It shall be so
composed, if possible, as to facilitate association with the
name of the point in plain language.
2.2.2 Coded designators shall not be duplicated within
1 100 km (600 NM) of the location of the radio navigation aid
concerned, except as noted hereunder.
Note.— When two radio navigation aids operating in
different bands of the frequency spectrum are situated at the
same location, their radio identifications are normally the
same.
2.3 States’ requirements for coded designators shall be
notified to the Regional Offices of ICAO for coordination.
3. Designators for significant points
not marked by the site of
a radio navigation aid
3.1 Where a significant point is required at a position not
marked by the site of a radio navigation aid, the significant
point shall be designated by a unique five-letter pronounceable
“name-code”. This name-code designator then serves as
the name as well as the coded designator of the significant
point.
3.2 This name-code designator shall be selected so as to
avoid any difficulties in pronunciation by pilots or ATS
Annex 11 — Air Traffic Services Appendix 2
1/11/01 APP 2-2
personnel when speaking in the language used in ATS
communications.
Examples: ADOLA, KODAP
3.3 The name-code designator shall be easily recognizable
in voice communications and shall be free of
ambiguity with those used for other significant points in the
same general area.
3.4 The name-code designator assigned to a significant
point shall not be assigned to any other significant point.
3.5 States’ requirements for name-code designators
shall be notified to the Regional Offices of ICAO for
coordination.
3.6 In areas where no system of fixed routes is
established or where the routes followed by aircraft vary
depending on operational considerations, significant points
shall be determined and reported in terms of World Geodetic
System — 1984 (WGS-84) geographical coordinates, except
that permanently established significant points serving as exit
and/or entry points into such areas shall be designated in
accordance with the applicable provisions in 2 or 3.
4. Use of designators
in communications
4.1 Normally the name selected in accordance with 2 or
3 shall be used to refer to the significant point in voice
communications. If the plain language name for a significant
point marked by the site of a radio navigation aid selected in
accordance with 2.1 is not used, it shall be replaced by the
coded designator which, in voice communications, shall be
spoken in accordance with the ICAO spelling alphabet.
4.2 In printed and coded communications, only the coded
designator or the selected name-code shall be used to refer to
a significant point.
5. Significant points used for
reporting purposes
5.1 In order to permit ATS to obtain information
regarding the progress of aircraft in flight, selected significant
points may need to be designated as reporting points.
5.2 In establishing such points, consideration shall be
given to the following factors:
a) the type of air traffic services provided;
b) the amount of traffic normally encountered;
c) the accuracy with which aircraft are capable of adhering
to the current flight plan;
d) the speed of the aircraft;
e) the separation minima applied;
f) the complexity of the airspace structure;
g) the control method(s) employed;
h) the start or end of significant phases of a flight (climb,
descent, change of direction, etc.);
i) transfer of control procedures;
j) safety and search and rescue aspects;
k) the cockpit and air-ground communication workload.
5.3 Reporting points shall be established either as
“compulsory” or as “on-request”.
5.4 In establishing “compulsory” reporting points the
following principles shall apply:
a) compulsory reporting points shall be limited to the
minimum necessary for the routine provision of information
to air traffic services units on the progress of
aircraft in flight, bearing in mind the need to keep
cockpit and controller workload and air-ground communications
load to a minimum;
b) the availability of a radio navigation aid at a location
should not necessarily determine its designation as a
compulsory reporting point;
c) compulsory reporting points should not necessarily be
established at flight information region or control area
boundaries.
5.5 “On-request” reporting points may be established in
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