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Maritime Information
MARITIME VHF NARROWBAND CHANNELS - 12.5 KHZ

 

Assignment of channel numbers to interleaved channels and simplex operation of duplex channels in the VHF maritime band at 12.5 kHz offsets.  Frequencies are in MHz. Limited operation on narrowband channels is permitted in ITU-R Appendix S18 as amended by WRC 97, and is allowed in the US on public correspondence channels under 47 CFR 80.371(c)(C) (Third R&O PR Docket 92-257 released 9 July 1998). Channels and frequencies colored teal will be available in the U.S. for public correspondence. Channel 228 (red) will available in the U.S. for automatic identification systems (AIS).

A channel plan for simplex use of duplex channels, and 6.25 kHz channels (presently not authorized), is described at the bottom of this page.

This information is adapted from ITU-R Rec. M.1084-2, available from the International Telecommunications Union.
 

CHANNEL NUMBER

SHIP SHIP & COAST COAST
First 25kHz Channel Interleaved

12.5 kHz Channel

Second 25 kHz Channel
60 156.0250 160.6250
260 156.0375 160.6375
01 156.0500 160.6500
201 156.0625 160.6625
61 156.0750 160.6750
261 156.0875 160.6875
02 156.1000 160.7000
202 156.1125 160.7125
62 156.1250 160.7250
262 156.1375 160.7375
03 156.1500 160.7500
203 156.1625 160.7625
63 156.1750 160.7750
263 156.1875 160.7875
04 156.2000 160.8000
204 156.2125 160.8125
64 156.2250 160.8250
264 156.2375 160.8375
05 156.2500 160.8500
205 156.2625 160.8625
65 156.2750 160.8750
265 156.2875 160.8875
06 156.3000
206 156.3125 160.9125
66 156.3250 160.9250
266 156.3375 160.9375
07 156.3500 160.9500
207 156.3625 160.9625
67 156.3750
267 156.3875
08 156.4000
208 156.4125
68 156.4250
268 156.4375
09 156.4500
209 156.4625
69 156.4750
269 156.4875
10 156.5000
210 156.5125
70 156.5250

DSC calling, distress, & safety

270 156.5375 DSC guardband
11 156.5500
211 156.5625
71 156.5750
271 156.5875
12 156.6000
212 156.6125
72 156.6250
272 156.6375
13 156.6500
213 156.6625
73 156.6750
273 156.6875
14 156.7000
214 156.7125
74 156.7250
274 156.7375
15 156.7500
215 156.7625
75 156.7750 Guardband
275 156.7875 Guardband
16 156.8000 Calling, distress & safety
216 156.8125 Guardband
76 156.8250 Guardband
276 156.8375
17 156.8500
217 156.8625
77 156.8750
277 156.8875
18 156.9000 161.5000
218 156.9125 161.5125
78 156.9250 161.5250
278 156.9375 161.5375
19 156.9500 161.5500
219 156.9625 161.5625
79 156.9750 161.5750
279 156.9775 161.5775
20 157.0000 161.6000
220 157.0125 161.6125
80 157.0250 161.6250
280 157.0375 161.6375
21 157.0500 161.6500
221 157.0625 161.6625
81 157.0750 161.6750
281 157.0875 161.6875
22 157.1000 161.7000
222 157.1125 161.7125
82 157.1250 161.7250
282 157.1375 161.7375
23 157.1500 161.7500
223 157.1625 161.7625
83 157.1750 161.7750
283 157.1875 161.7875
24 157.2000 161.8000
224 157.2125 161.8125
84 157.2250 161.8250
284 157.2375 161.8375
25 157.2500 161.8500
225 157.2625 161.8625
85 157.2750 161.8750
285 157.2875 161.8875
26 157.3000 161.9000
226 157.3125 161.9125
86 157.3250 161.9250
286 157.3375 161.9375
27 157.3500 161.9500
227 157.3625 161.9625
87 157.3750 161.9750
287 158.3875 161.9875
28 157.4000 162.0000
228 157.4125 162.0125
88 157.4250 162.0250


Simplex Use of Duplex Channels

For channel number assignments to simplex operation of duplex channels. (This channel numbering sequence is provided as an example.):

CHANNEL No. SHIP SHIP & COAST COAST
For normal duplex operation:
60 156.025 160.625
For simplex operation of ship station frequency:
1 060 (Also channel 60A)(see Note 1) 156.025
For simplex operation of coast station frequency:
2 060 (Also channel 60B)(see Note 1) 160.625

NOTE�1�–�This method of numbering a duplex channel used for simplex operation is in accordance with the Digital Selective Calling Recommendation ITU-R�M.493, Annex 1, Table 13.� Simplex use of certain duplex channels is permitted in ITU WRC-97 modifications to ITU-R Appendix S18, and is also permitted on selected channels used in the United States.


6.25 kHz Narrowband Channels

Extension of channel number assignments for migration to 6.25 kHz channel spacing from the current 25 kHz channel spacing with interleaved 12.5 kHz offset frequencies channels.�� 6.25 kHz is currently not authorized in the maritime service in either ITU-R or U.S. regulations.� (This channel numbering sequence is provided as an example.):

CHANNEL No.
(6.25 kHz spacing)
SHIP SHIP & COAST COAST
60 156.025 160.625
160 156.03125 160.63125
260 156.0375 160.6375
360 156.04375 160.64375
01 156.050 160.650
101 156.05625 160.65625
201 156.0625 160.6625
301 156.06875 160.66875
61 156.075 160.675

International VHF Maritime Channels and Frequencies

U.S. VHF Maritime Channels and Frequencies