There are changes coming for the normal FM marine channels. The International Telecommunications Union has (ITU) has began re-numbering some of the international marine channels in anticipation of 12.5 KHz channels and digital modulation coming to the VHF marine band. You can read more about the changes here:
http://www.itu.int/dms_pubrec/itu-r/rec/m/R-REC-M.1084-5-201203-I!!PDF-E.pdf
The US Coast Guard has some offerings that show some of the new marine VHF channel numbers:
http://www.navcen.uscg.gov/?pageName=apps18
http://www.navcen.uscg.gov/?pageName=mtVhf
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