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2. Record the entry of this amendment on page (ii).
___________________
Foreword Annex 10 — Aeronautical Telecommunications
(vii) 1/11/01
Table A. Amendments to Annex 10, Volume V
Amendment Source(s) Subject(s)
Adopted
Effective
Applicable
71 Air Navigation Commission;
SP COM/OPS/95 Divisional
Meeting; third meeting of the
Aeronautical Mobile
Communications Panel (AMCP)
Introduction of new Volume V consisting of existing Annex material
and addition of material relating to the introduction of 8.33 kHz
channel spacing and changes to material related to the protection of
air-ground communications in the VHF band.
12 March 1996
15 July 1996
7 November 1996
72 Air Navigation Commission;
fourth meeting of the
Aeronautical Mobile
Communications Panel (AMCP)
Definition for VHF digital link; amendment to Table 4-1 (bis). 12 March 1997
21 July 1997
6 November 1997
73 — No change. —
74 Air Navigation Commission Introduction of: a) an interpilot air-to-air channel; and b) changes to
specifications on emergency locator transmitters.
18 March 1999
19 July 1999
4 November 1999
75 Air Navigation Commission;
sixth meeting of the Aeronautical
Mobile Communications Panel
(AMCP)
Clarification of guidance material on VDL interference immunity
performance.
13 March 2000
17 July 2000
2 November 2000
76
(2nd Edition)
Seventh meeting of the
Aeronautical Mobile
Communications Panel (AMCP)
Integrated voice and data link system (VDL Mode 3); data link
satisfying surveillance applications (VDL Mode 4); update of
references to the ITU Radio Regulations.
12 March 2001
16 July 2001
1 November 2001
77 Secretariat Consequential changes resulting from GNSS SARPs which provide
for GBAS data broadcast in the band 108 – 117.975 MHz.
27 February 2002
15 July 2002
28 November 2002
78 — No change. —
79 — No change. —
80 — No change. —
81 — No change. —
23/11/06
No. 81
INTERNATIONAL STANDARDS
AND RECOMMENDED PRACTICES
Annex 10, Volume V
Second Edition
Corrigendum
(EnglishIFrenchlS panish)
291 1 102
AERONAUTICAL TELECOMMUNICATIONS
ANNEX 10
TO THE CONVENTION ON INTERNATIONAL CIVIL AVIATION
VOLUME V
Aeronautical Radio Frequency Spectrum Utilization
SECOND EDITION - JULY 2001
CORRIGENDUM
1. Please replace existing page ATT B-1 dated 111 1/01 by the attached new page bearing the
notation "Corr".
2. Record the entry of this corrigendum on page (ii).
ATTACHMENT B. CONSIDERATIONS AFFECTING
THE DEPLOYMENT OF LF/MF FREQUENCIES AND
THE AVOIDANCE OF HARMFUL INTERFERENCE
1. Particularly in areas of high density of NDBs, it is
recognized that efficient planning is essential in order to: a)
ensure satisfactory operation of ADF equipment, and b)
provide the most efficient usage of the limited frequency
spectrum available for the NDB service. It is axiomatic that
regional meetings will so plan facilities as to ensure that all
facilities will receive the best possible protection from harmful
interference. Nevertheless, in certain regions, congestion of
facilities has been such that regional meetings have had to plan
in terms of a minimum protection ratio.
Regional meetings include in their planning consideration
of such factors as:
a) the possibility of reducing the number of NDBs
required, by coordination of system plans;
b) the possibility of reducing the coverage where a lesser
grade of service than that obtainable within the rated
coverage is acceptable;
c) the characteristics of ADF equipment in use;
d) the atmospheric noise grades, appropriate to the area
concerned;
e) ground conductivity; and
f) interference protection required at the edge of the rated
coverage.
Of the foregoing factors, that which is most susceptible to
improvement of a technical kind is c).
2. The 1979 World Administrative Radio Conference
adopted regulations concerning the assignment of frequencies
for aeronautical radio beacons operating in the LF/MF
frequency bands. A minimum protection ratio (wanted/
unwanted signal ratio) of 15 dB is to be used as the basis for
frequency assignment planning (RR Appendix S12). The
following data concerning the attenuation characteristics of
ADF equipment was used in the EUR region to aid in the
frequency assignment process:
Frequency Attenuation
difference (kHz) (dB)
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