Traffic circle

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In German inland shipping radio, the traffic group is defined as the allocation of channels for certain tasks. The public are regulated in the regional agreement on inland navigation .

If a ship's radio station takes part in several traffic circles, simultaneous reception must be ensured on all channels actually used. This does not affect the mandatory listening availability. Ship radio stations must be able to transmit and receive at least in the traffic groups nautical information, ship-ship and ship-port authorities.

Ship-to-ship traffic circle

The ship-to-ship traffic circle is used for radio links between ship radio stations. The output power when switching to one of these channels is automatically limited to a value between 0.5 W and 1 W. The official name of the ship is to be used as the call sign. The traffic circle can also be used for traffic safety systems.

Traffic circle nautical information

Radio links between ship radio stations and radio stations of the authorities responsible for operating services on inland waterways. The radio stations of these authorities can be either mobile radio stations or land radio stations. The official name of the ship is to be used as the call sign. The traffic circle can also be used for traffic safety systems.

Traffic circle ship-port authority

Radio links between ship radio stations and radio stations of the authorities responsible for operating services in inland ports. The output power when switching to one of these channels is automatically limited to a value between 0.5 W and 1 W. The official name of the ship is to be used as the call sign.

Radio traffic on board

Radio links on board a ship or within a group of vehicles that are being pushed or towed, as well as instructions for anchoring and working with lines. The output power when switching to one of these channels is automatically limited to a value between 0.5 W and 1 W. The use of radio traffic on board is not permitted on small vehicles within the meaning of the European Inland Waterways Regulations (CEVNI). A call sign must also be allocated for portable radio devices that are used for radio communications on board. The use of this callsign is voluntary.

Public exchange of information

Radio links between ship radio stations and the public national and international telecommunications networks and in the opposite direction. (Is no longer supported in Germany since the mass spread of mobile phones.)

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