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for VOR facilities shall be selected in the following order:
4.2.5 Frequency deployment. The geographical separation
a) frequencies ending in odd tenths of a megahertz in the between facilities operating on the same and adjacent
band 1 11.975 - 117.975 MHz; frequencies shall be determined regionally and shall be based
on the following criteria:
b) frequencies ending in even tenths of a megahertz in the
band 111.975 - 117.975 MHz; a) the required functional service radii of the facilities;
C) frequencies ending in even tenths of a megahertz in the b) the maximum flight altitude of the aircraft using the
band 108 - 11 1.975 MHz; facilities;
d) frequencies ending in 50 kHz in the band 11 1.975 - c) the desirability of keeping the minimum IFR altitude as
117.975 MHz, except as provided in 4.2.3.1; low as the terrain will permit.
28/11/02
No. 77
Chapter 4 Annex I0 - Aerunautical Telecornrnunicatiuns
Table 4-2
Associated paired
Group DME channels VHF channels Remarks
Assignment
procedure
1 EVEN ILS 100 kHz spacings Would normally be used if a single DME is
18X to 56X paired with ILS and is part of MLS 1 2 EVEN ILS 50 kHz spacings
18Y to 56Y
3 EVEN VOR 50 kHz spacings
BOY to 118Y Odd tenths of a MHz
4 ODD VOR 50 kHz spacings
17Y to 55Y
5 ODD VOR 50 kHz spacings
81Y to 119Y Even tenths of a MHz
6 EVEN No associated paired
18W to 56W VHF channel
7 EVEN No associated paired
182 to 562 VHF channel
8 EVEN No associated paired
802 to 1 182 VHF channel
9 ODD No associated paired
172 to 55Z VHF channel
10 ODD No associated paired
812 to 1 192 VHF channel
for general use
(see 4.3.1)
for later use
(see 4.3.2)
Note.- DME channels in Groups I and 2 may be used in association with ILS andlor MLS. DME channels k Groups 3, 4
and 5 may be used in association with VOR or MLS.
Note.- Guidance material on this subject is contained in
the Attachments to this Annex.
43 Utilization in the band
%O - 1 215 MHz for DME
4.2.6 Recommendation.- To alleviate frequency Note.- Guidance on the frequency planning of channels for
congestion problems at locations where two separate IU DME systems is given in Annex 10, Volume I, ~ttachmentC ,
facilities serve opposite ends of the same runway or dgerent 7.
runways at the same aivort, the assignment of identical ILS
localizer and glide path paired frequencies should be 4.3.1 DME operating channels bearing the sufflx "X" or
permitted provided that: "Y' in Table A, Chapter 3 of Annex 10, Volume I shall be
chosen on a general basis without restriction.
a) the operational circumstances permit;
Note.- The channel pairing plan provides for the use of
certain Y channels with either VOR or M U . The guidance
b) each localizer is assigned a different identification material in Annex Volume I, Attachment C, Section 7, includes
signal; and specific provisions relating to situations where the same, or
adjacent channel, is used in the same area for both systems.
c) arrangements are made whereby the localizer and glide
path not in operational use cannot radiate. 4.3.2 DME channels bearing the sufflx "W or "Z in
Table A, Chapter 3 of Annex 10, Volume I, shall be chosen on
Note.- The Standards in Annex 10, Volume I, 3.1.2.7.2 and the basis of regional agreement when they become applicable
3.1.3.9, specify the equipment arrangements to be made. in accordance with the following:
Annex 10 - Aeronautical Telecommunications Volume V
a) for restricted regional use on or after, whichever is the
later:
1) 1 January 1989; or
2) a date prescribed by the Council giving a period of
two years or more following approval of the regional
agreement concerned;
b) for general use on or after, whichever is the later:
1) 1 January 1995; or
2) a date prescribed by the Council giving a period of
two years or more following approval of the regional
agreement concerned.
Note.- "Restricted use" is intended to refer to the limited
use of the channel by only suitably equipped aircraft and in
such a manner that:
a) the performance of existing DME equipment not capable
of operating on these multiplexed channels will be
protected from harmficl interference;
b) a general requirement for the carriage of DME airborne
equipment capable of operating on these multiplexed
channels will not be imposed; and
c) operational service provided to international operators
using existing DME equipment without the multiplexed
channel capability is not derogated.
4.3.3 For regional assignment planning, the channels for
DME associated with MLS shall be selected from Table 4-2.
　
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