Radio Communications

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Radio Communications

Radio Licence

You will need to apply for a Ship Radio Licence through Ofcom,

If you need help applying for a Ship Radio Licence contact Ofcom Licensing Centre on:

Tel: +44 (0)20 7981 3040

Fax: +44 (0)20 7981 3235



MMSI Number & Call Sign

The Maritime Mobile Service Identity (MMSI) number and call sign will change with the issue of a new radio licence.

Arrange with your shore based maintainer for all GMDSS equipment to be reprogrammed with new MMSI numbers prior to survey.


Radio Survey

Classed cargo ship managers must arrange the radio survey and certification through their Classification Society.  Further information can be found in MGN 392.


Long-Range Identification and Tracking (LRIT)

The Long-Range Identification and Tracking (LRIT) system provides for the global identification and tracking of ships.

Under SOLAS Chapter V, Regulation 19-1, vessels >300 GT on international voyages are required to transmit LRIT information. For more information, please refer to the documents below:


Emergency Position Indicating Radio Beacon (EPIRB) Registration

Please arrange for mandatory EPIRB registration through UK Ship Register, contact details:

Tel: +44(0) 1326 211569

Fax: +44(0) 1326 319260



Please also arrange decommissioning/re-commissioning of all Satcom IDs with your airtime provider.

For COSPAS-SARSAT 406MHz: EPIRBS serial coding should be used.

For INMARSAT 1.6GHz: EPIRBS INMARSAT London should be contacted at:


Inmarsat Global Limited

99 City Road



United Kingdom

Tel: +44 (0)20 7728 1777