3. DSC OVERVIEW

Contents of a DSC call

Calling category

Call category

Call

 

 

DISTRESS

Distress Alerts, Distress relay area, Distress relay coast

 

 

GENERAL

Individual, PSTN message, Test message, Group message, Area

message, Position, Medical Transport, Nautical Craft, Polling message

 

 

 

Station ID

Own ship ID and sending station ID. Coast station ID begins with 00; Group ID begins with 0.

Priority

Distress: Grave and imminent danger and request immediate assistance.

Urgency: A calling station has a very urgent call to transmit concerning safety of ship, aircraft or other vehicle or safety of person.

Safety: A station is about to transmit a call containing an important navigational or meteorological warning.

Routine: General calling

Communication type

Telephone: Telephone (J3E) by SSB radiotelephone

NBDP-ARQ:Telex (J2B) mode ARQ via NBDP Terminal Unit

NBDP-FEC:Telex (J2B) mode FEC via NBDP Terminal Unit

DATA: Data communication by SSB (Routine individual only)

Communication frequency

Working frequency used to call by telephone, NBDP or DATA. The sending station may have the receiving frequency (ship or coast station) assign the frequency to use.

Position

Position can be automatically or manually sent.

DSC frequency

DSC frequency to use. If the call priority is SAFETY, URGENCY and DISTRESS, choose a DSC distress frequency.

End code

The end of a DSC call is denoted by RQ (Acknowledgement required), BQ (Acknowledgement) or EOS (no acknowledgement required).

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Furuno FS-5070 manual Contents of a DSC call