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The above figures (or distance separation criteria derived
from them) have also been applied in other regions in
determining the minimum protection ratio.
Where a bearing accuracy of 25 degrees is required at the
edge of cover, a minimum protection of 15 dB by day should
be used as the basis for LF/MF channel assignment planning.
3. In view of the fact that in many regions there is a need
to improve the planning criteria it is considered that the main
source from which improvement can be derived is recognition
of higher attenuation figures than those given above. Regional
meetings are accordingly advised that, when the congestion is
such that the use of the above figures no longer permits
efficient planning of the LFIMF frequency spectrum available,
the following figures represent from a technical point of view
the best that can be accepted in determining distance
separation criteria:
Frequency Attenuation
difference (kHz) i s )
When using these figures, it should be noted that the RF
selectivity of modem ADF equipment is in general better
ANNEX 10 - VOLUME V ATT B-1 Corr.
29/1/02
Annex 10 - Aeronautical Telecommunications
than these figures and that, while the RF selectivity of older
ADF equipment is not better than these figures, consideration
of the dynamic characteristic of this older equipment shows
this to be better. It could therefore be expected that frequency
planning based on the new figures would considerably
improve the service provided to users of modem equipment,
and would not materially reduce the service presently provided
to those aircraft using the older equipment.
Volume V
Nevertheless, in their planning, regional meetings would
need to consider this question most carefully.
4. It is further noted that, in certain regions, many NDBs
are used with voice channels and that this usage is aligned with
the Note at the head of Volume I, 3.4.6. It is expected that
regional meetings will take this fact into account when
establishing criteria for frequency planning.
ATT B-2
Transmittal Note
SUPPLEMENT TO
ANNEX 10 - AERONAUTICAL TELECOMMNNICATIONS
VOLUME V
(AERONAUTICAL RADIO FREQUENCY SPECTRUM UTILIZATION)
(Second Edition)
1. The attached Supplement supersedes all previous Supplements to Annex 10, Volume V, and includes differences
notified by Contracting States up to 1 April 2003 with respect to all amendments up to and including Amendment 76.
2. This Supplement should be inserted at the end of Annex 10, Volume V (Second Edition). Additional differences
received from Contracting States will be issued at intervals as amendments to this Supplement.
SUPPLEMENT TO
ANNEX 10 - AERONAUTICAL TELECOMMUNICATIONS
Volume V
(Aeronautical radio frequency spectrum utilization)
(Second Edition)
Differences between the national regulations and practices of Contracting States
and the corresponding International Standards and Recommended Practices
contained in Annex 10, Volume V, as nobfied to ICAO in accordance with
Article 38 of the Convention on Inrernational Civil Aviation and the Council's
resolution of 2 1 November 1950.
APRIL 2003
I N T E R N A T I O N A L C I V I L A V I A T I O N O R G A N I Z A T I O N
(ii) SUPPLEMENTTO ANNEX1 0, VOLUME S ECOND EDITION)
RECORD OF AMENDMENTS TO SUPPLEMENT
No. Date Entered by
AMENDMENTS TO ANNEX 10, VOLUME V, ADOPTED OR APPROVED BY THE COUNCIL
SUBSEQUENT TO THE SECOND EDITION ISSUED JULY 2001
No.
Date of
adoption or
approval
Date
applicable
SUPPLEMENT TO ANNEX 10, VOLUME V (SECOhD EDITION) (iii)
1. Contracting States which have notified ICAO of differences
The Contracting States listed below have notitled ICAO of differences which exist between their national regulations and
practices and the International Standards and Recommended Practices of Annex 10, Volume V (Second Edition), up to and
including Amendment 76, or have commented on implementation.
The page numbers shown for each State and the dates of publication of those pages correspond to the actual pages in this
Supplement.
Date of Pages in Date of
State notification Supplement publication
Australia
Cook Islands
France
New Zealand
2. Contracting States which have notified ICAO that no differences exist
Date of Date of
State notification State notification
Argentina
Bahrain
Belams
Cameroon
Canada
Chile
Denmark
Egypt
Eritrea
Georgia
Greece
India
Ireland
Kenya
Luxembourg
Maldives
Mauritius
Mexico
Norway
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