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Appendices | RS90S User Manual
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)
AAA) 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-RM.2092. (WRC-
15)
mm) Transmission on these channels is limited to coast stations. If
permitted by administrations and specified by national regulations,
these channels may be used by ship stations for transmission.
All precautions should be taken to avoid harmful interference to
channels AIS 1, AIS 2, 2027* and 2028*. (WRC-15)
* From 1 January 2019, channel 2027 will be designated ASM 1 and
channel 2028 will be designated ASM 2.
w1) In Regions 1 and 3:
Until 1 January 2017, the frequency bands 157.025-157.175 MHz and
161.625-161.775 MHz (corresponding to channels: 80, 21, 81, 22, 82,
23 and 83) may be used for digitally modulated emissions, subject
to coordination with affected administrations. Stations using these
channels or frequency bands for digitally modulated emissions shall
not cause harmful interference to, or claim protection from, other
stations operating in accordance with Article 5.
From 1 January 2017, the frequency bands 157.025-157.100 MHz
and 161.625-161.700 MHz (corresponding to channels: 80, 21, 81
and 22) are identified for utilization of the digital systems described
in the most recent version of Recommendation ITU-R M.1842 using
multiple 25 kHz contiguous channels.
From 1 January 2017, the frequency bands 157.150-157.175 MHz
and 161.750-161.775 MHz (corresponding to channels: 23 and 83)
are identified for utilization of the digital systems described in the
most recent version of Recommendation ITU-R M.1842 using two
25 kHz contiguous channels. From 1 January 2017, the frequencies
157.125 MHz and 161.725 MHz (corresponding to channel: 82) are
identified for the utilization of the digital systems described in the
most recent version of Recommendation ITU-R M.1842.
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