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International Vhf Marine Radio Channels and Frequencies
The following table
is adapted from the International Telecommunications Union Radio Regulations
Appendix 18, including changes adopted by the 2015 World Radio Conference.
Transmission on frequencies or channels shown in blue are
not allowed within U.S. territorial waters, but are allowed on the high seas
and in most other countries. Note that a marine radio operating in the
international mode on a channel in which the ship station frequency is shown in
black and the shore station frequency shown in blue would not be able to
communicate with a U.S. shore station. Frequencies and channels shown in green were auctioned in the U.S. and are
only available from the auction winner. The large number of blue channels and frequencies indicates the
shortage of VHF maritime spectrum in the U.S. compared to most other maritime
countries.
The Table below
defines the channel numbering for maritime VHF communications based on 25 kHz
channel spacing and use of several duplex channels. The channel numbering and the
conversion of two-frequency channels for single-frequency operation shall
be in accordance with Recommendation
ITU-R M.1084-5 Annex 4, Tables 1 and 3. The Table below also describes
the harmonized channels where the digital technologies defined in the most
recent version of Recommendation ITU-R M.1842 could be deployed.
NOTES FROM THE
TABLE ABOVE:
General Notes
a. Administrations
may designate frequencies in the inter ship, port operations and ship movement
services for use by light aircraft and helicopters to communicate with ships or
participating coast station in predominantly maritime support operations under
the conditions specified in Nos. 51.69, 51.73, 51.74, 51.75, 51.76,
51.77 and 51.78. However, the use of the channels which
are shared with public correspondence shall be subject to prior agreement
between interested and affected administrations.
b. The channels of
the present Appendix, with the exception of channels 06, 13, 15, 16, 17, 70, 75
and 76, may also be used for high speed data and facsimile transmissions,
subject to special arrangement between interested and affected administrations.
c. The channels of
the present Appendix, with exception of channels 06, 13, 15, 16, 17, 70, 75 and
76, may be used for direct-printing telegraphy and data transmission, subject
to special arrangement between interested and affected administrations
d. The frequencies
in this table may also be used for radio communications on inland waterways in
accordance with the conditions specified in No. 5.226.
e. Administrations
may apply 12.5 kHz
channel interleaving on a non-interference basis to 25 kHz channels,
in accordance with the most recent version of Recommendation ITU-R M.1084,
provided:
It shall not affect
the 25 kHz channels of the present Appendix maritime mobile distress and safety
frequencies, especially the channels 06, 13, 15, 16, 17, 70, AIS 1 and AIS
2, nor the technical characteristics mentioned in Recommendation ITU-R
M.489-2 for these channels;
Implementation of
12.5 kHz channel interleaving and consequential national requirements shall be
subject to coordination with affected administrations.
Specific notes
f. The frequencies
156.300 MHz (channel 06), 156.525 MHz (channel 70), 156.800 MHz (channel 16), 161.975 MHz (AIS 1) and 162.025 MHz (AIS 2) may also be used
by aircraft stations for the purpose of search and rescue operations and other
safety-related operations.
g. Channels 15 and
17 may also be used for on-board communications provided the effective radiated
power does not exceed 1 W, and subject to the national regulations of the
administration concerned when these channels are used in its territorial
waters.
h. Within the
European Maritime Area and in Canada these frequencies (channels 10, 67, 73)
may also be used, if so required, by the individual administrations concerned,
for communication between ship stations, aircraft stations and participating
land stations engaged in coordinated search and rescue and anti-pollution
operations in local areas, under the conditions specified in Nos. 51.69,
51.73, 51.74, 51.75, 51.76, 51.77 and 51.78.
i. The preferred first three frequencies for
the purpose indicated in note a) are 156.450 MHz (channel 09),
156.625 MHz (channel 72) and 156.675 MHz (channel 73).
j. Channel (70) is
to be used exclusively for digital selective calling for distress, safety and
calling.
k. Channel 13 is
designated for use on a world-wide basis as a navigation safety communication
channel, primarily for intership navigation safety
communications. It may also be used for the ship movement and port operations
service subject to the national regulations of the administrations concerned.
l. The channels
(AIS 1 and AIS 2) are used for an automatic identification
system (AIS) capable of providing worldwide operation, unless other
frequencies are designated on a regional basis for this purpose. Such
use should be in accordance with the most recent version of Recommendation
ITU-R M.1371.
m. These channels may be operated as a single frequency channels,
subject to coordination with affected administrations. The following conditions
apply for single frequency usage: n. With the
exception of AIS, the use of these channels (75 and 76) should be
restricted to navigation-related communications only and all precautions should
be taken to avoid harmful interference to channel 16 by limiting the output
power to 1 W.
o. (n/a)
p. Additionally,
AIS 1 and AIS 2 may be used by the mobile-satellite service (Earth-to-space)
for the reception of AIS transmissions from ships.
q. When using these
channels (10 and 11), all precautions should be taken to avoid harmful interference
to channel 70.
r. In the maritime
mobile service, this frequency is reserved for experimental use for future
applications or systems (e.g. new AIS applications, man over board systems,
etc.). If authorized by administrations for experimental use, the operation
shall not cause harmful interference to, or claim protection from, stations
operating in the fixed and mobile services. See the U.S. VHF Marine
Radio Frequencies and Channels
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