Why DSC functions are not working on my Raymarine RAY91 Radio?
- MMatthew SampsonSep 9, 2025
If DSC functions are not available or working on your Raymarine Radio, program your MMSI number. Remember that in the United States, this MUST be programmed into the unit by an authorized dealer. Also, confirm that the radio is not set to ATIS or Marcom-C mode, as DSC is not permitted in these modes. If you are not in an ATIS region, switch off ATIS mode via Menu > Set-up > ATIS set-up > ATIS.
















