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) – 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.
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) – 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.
Source: Wikipedia "Ship movement service" · CC BY-SA 4.0
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