DS EN 301843-4:2006 Electromagnetic Compatibility And Radio Spectrum Matters (Erm) - Electromagnetic Compatibility (Emc) Standard For Marine Radio Equipment And Services - Part 4: Specific Conditions For Narrow-Band Direct-Printing (Nbdp) Navtex Receivers Describes, in conjunction with EN 301 843-1, the assessment of Narrow-Band Direct-Printing (NBDP) NAVTEX receivers operating in the maritime mobile service, and ancillary equipment in respect of Elect