Ship movement service

Ship movement service (short: SMS; also: ship movement radiocommunication service) is – according to Article 1.31 of the International Telecommunication Union's (ITU) Radio Regulations (RR) ^[1] – defined as «A safety service in the maritime mobile service other than a port operations service, between coast stations and ship stations, or between ship stations, in which messages are restricted to those relating to the movement of ships. Messages which are of a public correspondence nature shall be excluded from this service.»

See also

Main articles: Radio station and Radiocommunication service

The ITU Radio Regulations classifies this radiocommunication service as follows:
Mobile-satellite service (article 1.25)

• Maritime mobile service (article 1.28)
  • Maritime mobile-satellite service (article 1.29)
  • Port operations service (article 1.30)
  • Ship movement service

• International Telecommunication Union (ITU)

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