The long-term requirement within the international maritime mobile community is for an advanced spectrally efficient digital system to provide improved efficiency in the use of the band 156-174 MHz. This Recommendation provides administrations with an exa
ITU-R M.1312-1997 history
1997ITU-R M.1312-1997 A Long-Term Solution for Improved Efficiency in the Use of the Band 156-174 MHz by Stations in the Maritime Mobile Service