Ship movement service

file:Maritime VHF Sailor type.jpg dedicated to Ship movement service.]]

{{distinguish-redirect|Ship movement|Ship motion}}

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) ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.31, definition: ship movement service / ship movement radiocommunication service – 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|Radio station|Radiocommunication service}}