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Old 01-28-2017, 1:29 PM
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Default VHF Marine Channel Renumbering for Great Lakes Region

Just a heads up, that the Canadian and U.S. Coast Guard (Great Lakes Region) have started the marine channel conversion on January 1 of this year, based on the recent ITU World Radio Conference changes, that developed a new channel plan for the VHF marine radio frequencies.

Once completed the simplex channels or ship side frequencies will have a prefix of 10xx and the continuous broadcast/former duplex/restricted experimental or coast side channels will have the prefix 20xx.

The simplex, continuous broadcast, experimental and dedicated CCG/USCG channels have been the only ones, so far, that are in the process of converting over.

There will be 8 new channels for Canada, but IC hasn't released their use yet.

I would imagine that the inland waterways will be a bit slower to make the change, but the areas where international shipping is occurring, they will be quick with the changes.
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Old 01-28-2017, 2:11 PM
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Do you have a link to the ITU changes?

Never mind. Already on the USCG Pages
http://www.navcen.uscg.gov/?pageName=mtVhf
http://www.navcen.uscg.gov/?pageName=apps18

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Originally Posted by VA3DBJ View Post
Just a heads up, that the Canadian and U.S. Coast Guard (Great Lakes Region) have started the marine channel conversion on January 1 of this year, based on the recent ITU World Radio Conference changes, that developed a new channel plan for the VHF marine radio frequencies.

Once completed the simplex channels or ship side frequencies will have a prefix of 10xx and the continuous broadcast/former duplex/restricted experimental or coast side channels will have the prefix 20xx.

The simplex, continuous broadcast, experimental and dedicated CCG/USCG channels have been the only ones, so far, that are in the process of converting over.

There will be 8 new channels for Canada, but IC hasn't released their use yet.

I would imagine that the inland waterways will be a bit slower to make the change, but the areas where international shipping is occurring, they will be quick with the changes.
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Old 01-28-2017, 3:52 PM
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I was looking through the ITU-R M.1084-5 document and it lists the recommendations for C4FM use on the 12.5 kHz offset channels. I wouldn't be too surprised if USCG will use P25 on those channels.

http://www.itu.int/dms_pubrec/itu-r/...3-I!!PDF-E.pdf
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Old 01-28-2017, 6:16 PM
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USCG already has their own VHF/UHF LMR where they run P25 already

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I was looking through the ITU-R M.1084-5 document and it lists the recommendations for C4FM use on the 12.5 kHz offset channels. I wouldn't be too surprised if USCG will use P25 on those channels.

http://www.itu.int/dms_pubrec/itu-r/...3-I!!PDF-E.pdf
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