Sony FS-1570 Benutzerhandbuch

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3 DSC 
OVERVIEW 
 
3-2 
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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