Furuno FS-2570, FS-1570 manual Contents of a DSC call

3DSC OVERVIEW

Contents of a DSC call

• Calling category

Call category	Call
Individual	Individual, PSTN, Test, Position, Polling,
	Relay Sel (specific coast station)
All Ships	All Ships, Neutral, Medical, Relay All
Group	Group
Geographical Area	Area
Distress Call	Distress

•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.

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

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

Business: Communication related to the navigation, movements and needs of ships and aircraft.

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

•Communication frequency

Working frequency used to call by telephone or NBDP. 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 category is SAFETY, URGENCY or DISTRESS, choose a DSC distress frequency.

•End code

The end of a DSC call is denoted by ACK RQ (Acknowledge Request), ACK BQ (Acknowledge Back) or EOS (End of Sequence).

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