Ad Space — Top Banner

MMSI Not Programmed

Standard Horizon Marine VHF Radio

Severity: Minor

Source: OnlyErrorCodes.com — Every error code. One place.

Standard Horizon MMSI Not Programmed — Fix Guide

What Does This Error Mean?

'MMSI Not Programmed' means your VHF radio doesn't have a Maritime Mobile Service Identity number registered — DSC distress calls and digital features won't work without it.
Register an MMSI through your country's appropriate authority (FCC in the US, BoatUS, or similar) — usually free for recreational boaters.
Once you have the 9-digit MMSI, program it into the radio via the menu.
You can only program MMSI ONCE on most radios — get it right.

Affected Models

  • Standard Horizon GX1850
  • Standard Horizon GX2200
  • Standard Horizon GX6000
  • Standard Horizon HX870

Common Causes

  • MMSI never registered or never programmed into the radio
  • Radio has been factory-reset, clearing the MMSI
  • Replacement radio not yet programmed
  • Wrong MMSI entered (rare — most radios accept any valid format)

How to Fix It

  1. Register an MMSI.

    In the US: BoatUS (free, recreational use only) or the FCC (required for commercial or international use).
    In the UK: Ofcom.
    In Canada: Industry Canada.
    Have your boat info ready: name, length, type, callsign if you have one.
    Most registrations are completed online in 10 minutes.

  2. Receive your 9-digit MMSI.

    After registration, you receive a 9-digit number (e.g., 366123456 for the US).
    Write this down — you'll program it into your radio.
    Save the registration confirmation for your records.

  3. Open the radio's MMSI programming menu.

    On Standard Horizon: Menu → DSC → MMSI Setup → User MMSI.
    The exact path varies by model; consult the manual.
    The radio will prompt for the 9-digit MMSI.

  4. Enter the MMSI carefully.

    Use the radio's keypad to enter all 9 digits.
    Double-check before confirming.
    Most Standard Horizon radios only allow MMSI programming once — entering wrong locks the radio.
    If you accidentally lock the radio with wrong MMSI, contact Standard Horizon for unlock procedure (may require sending the radio in).

  5. Verify and test.

    After confirming MMSI, the radio displays it on the home screen.
    Test DSC functions: send a routine call to a friend's MMSI to confirm operation.
    Don't test the distress button — that triggers a real distress signal that gets you and the Coast Guard in trouble.

Frequently Asked Questions

Do I need an MMSI if I never use DSC?

Strictly speaking, you can use VHF voice channels without MMSI.
But DSC distress is the primary safety feature of modern marine VHF — without MMSI, your radio's distress button is useless.
That's a serious safety gap.
Register an MMSI even if you never plan to use DSC — it costs nothing for recreational use.

Can I share an MMSI between two radios?

No — each MMSI must be unique to a single boat (in some jurisdictions, single radio).
If you have two radios on one boat, your country's regulator may allow both to use the same MMSI; check local rules.
Don't use someone else's MMSI — it's tied to a specific vessel and operator.