Sony FS-2570 User Manual

 

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 (kHz) 
2187.5, 4207.5, 6312.0, 8414.5, 12577.0, and 16804.5. 
 
The DSC station sends and receives DSC general and safety calls via the radiotelephone. 

TRANSCEIVER

UNIT

FS-1570T
FS-2570T

Distress Frequency

Routine DSC Call

Routine DSC Calls

Option

(FS-2570

only)

CONTROL UNIT

FS-2570C

Distress alert, routince DSC call

 

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

All Ships 

Call to all ships 

Distress   

Your ship sends distress call 

Distress relay all   

Your ship relays distress call to all ships 

Distress relay select    Your ship relays distress call to a coast station 

Geographical Area   

Call to all ships in a specific geographical area 

Group   

Call to a specific group 

Individual   

Call to a specific address 

Medical Transport   

Inform all ships that your ship is carrying medical supplies 

Neutral Craft 

Inform all ships that your ship is not a participant in armed conflict 

Polling  

Call to determine if own ship is in communicating range with other 
ship 

Position 

1) You send your position to other stations 
2) Your ship requests position of other station 

PSTN 

Call over Public Switched Telephone Network (PSTN) 

Test 

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

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