DSC & GPS Setup
DSC (Digital Selective Calling) can automatically transmit your position during a distress call. It only works correctly if your radio has a valid MMSI and receives GPS position data.
Required Steps
- Get an MMSI number: Register at BoatUS (free) or through the FCC (paid, required for international use).
- Program your MMSI into the radio: Follow your radio’s manual exactly (many radios lock after initial entry).
- Connect GPS: Built-in or external GPS is required for position broadcasting and automated distress.
- Test DSC: Use the radio’s DSC test mode (do not broadcast a real distress call).
Critical: A DSC radio that isn’t programmed with your MMSI and linked to GPS is effectively useless for automated distress.
Set it up the day you install the radio.
Common Mistakes
1) MMSI not entered: DSC distress won’t include your identity.
2) No GPS feed: DSC distress won’t include your position.
3) Bad coax/connectors: Range can be cut drastically. Use proper marine cable and weatherproof connections.
4) Never testing: Test DSC correctly using test mode so you know it works.
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