Furuno FS-5070 Manual De Usuario

 

DSC is an acronym meaning Digital Selective Calling. It is a digital distress and general 
calling system in the MF and HF bands used by ships for transmitting distress alerts and 
general calls and by coast stations for transmitting the associated acknowledgements. 
For DSC distress and safety calling in the MF and HF bands, the frequencies are 2187.5, 
4207.5, 6312.0, 8414.5, 12577.0, and 16804.5 kHz. 
 
The DSC station sends and receives DSC general and distress calls via the radiotelephone. 

TRANSCEIVER

UNIT

Distress Frequency

Routine DSC Call

Routine DSC Calls

Option

CONTROL UNIT

 

DSC calls are roughly divided in two groups: distress, urgency and safety messages, and 
routine messages. Below are the types of DSC messages.   

Distress Alerts 

Your ship sends distress message 

Distress relay area   

Your ship relays distress call to all ships in a specific geographical area 

Distress relay coast 

Your ship relays distress call to a coast station 

Medical Transport 

Inform areas that your ship is carrying medical supplies* 

Neutral Craft 

Inform areas that your ship is not a participant in armed conflict* 

Individual   

Call to a specific address 

PSTN message 

Call over Public Switched Telephone Network (PSTN) 

Test message 

Send test signal to a station to test your station’s functionality 

Group message 

Call to a specific group 

Area message 

Call to all ships in a specific geographical area 

Position 

Your ship requests position of other ships 

Polling message 

Confirm if own ship is within communicating range with other ships. 
(Receive and answer only) 

*Special Message: When sending these messages, set the acknowledgement. See section 
6.15.