maritime mobile service
mobile radiocommunication between coast stations and ship stations, between ship stations, or between associated on-board communication stations
port operations service
maritime mobile radiocommunication in or near a port, between coast stations and ship stations or between ship stations, relating to the operational handling, the movement and the safety of ships and, in emergency, to the safety of persons
ship movement service
safety radiocommunication between coast stations and ship stations, or between ship stations, in which messages are restricted to those relating to the movement of ships