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Channel charts | Link-6S User Guide
85) may be used for digitally modulated emissions, such as those
described in the most recent version of Recommendation ITU-R M.2092,
subject to coordination with affected administrations. (WRC-15)
x) From 1 January 2017, in Angola, Botswana, Lesotho, Madagascar,
Malawi, Mauritius, Mozambique, Namibia, Democratic Republic of
the Congo, Seychelles, South Africa, Swaziland, Tanzania, Zambia and
Zimbabwe, the frequency bands 157.125-157.325 and 161.725-161.925
MHz (corresponding to channels: 82, 23, 83, 24, 84, 25, 85, 26 and 86) are
designated for digitally modulated emissions.
From 1 January 2017, in China, the frequency bands 157.150-157.325
and 161.750-161.925 MHz (corresponding to channels: 23, 83, 24, 84, 25,
85, 26 and 86) are designated for digitally modulated emissions. (WRC-
12)
xx) From 1 January 2019, the channels 24, 84, 25 and 85 may be merged in
order to form a unique duplex channel with a bandwidth of 100 kHz in
order to operate the VDES terrestrial component described in the most
recent version of Recommendation ITU-R M.2092. (WRC-15)
y) These channels may be operated as single or duplex frequency
channels, subject to coordination with affected administrations. (WRC-
12)
z) Until 1 January 2019, these channels may be used for possible testing
of future AIS applications without causing harmful interference to, or
claiming protection from, existing applications and stations operating in
the fixed and mobile services.
From 1 January 2019, these channels are each split into two simplex
channels. The channels 2027 and 2028 designated as ASM 1 and ASM
2 are used for application specific messages (ASM) as described in the
most recent version of Recommendation ITU-R M.2092. (WRC-15)
zx) In the United States, these channels are used for communication
between ship stations and coast stations for the purpose of public
correspondence. (WRC-15)
zz) From 1 January 2019, channels 1027, 1028, 87 and 88 are used as single-
frequency analogue channels for port operation and ship movement.
(WRC-15)
Source: ITU Radio Regulations ; reproduced with permission from ITU.