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

Ship station dedicated to Ship movement service.

"Ship movement" redirects here and is not to be confused with Ship motion.

Classification

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