What is an MMSI number?

MMSI (Maritime Mobile Service Identity) numbers are a series of nine digits, which are used to uniquely identify a radio station or group of radio stations. When sending a DSC message the MMSI is automatically included, and you can address messages to specific vessels or groups using their MMSIs. The MMSI has a standard format (just like a telephone number) and it identifies the type of station, country of registration and vessel identity. In the UK MMSIs are assigned as a part of the ship’s radio licensing procedure.

For further information about this subject, read our article 'Everything you need to know about MMSI Numbers!'


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