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APPENDIX 4 DIGITAL INTERFACE (IEC 61162-1)
AP-21
Output sentences (IEC 61162-1)
DSC, DSE
Output sentence description
• DSC - Digital selective calling information
• DSE - Expanded digital selective calling
$CTDSC,xx,xxxxxxxxxx,xx,xx,xx,x.x,x.x,xxxxxxxxxx,xx,a,a*hh<CR><LF>
1 2 3 4 5 6 7 8 9
10 11
1. Format specifier (2 digits)
2. Address (10 digits)
3. Category (2 digits or NULL)
4. Nature of Distress or first telecommand (2 digits or NULL)
5. Type of Communication or second telecommand (2 digits)
6. Position or Channel /Frequency (Max. 4 digits)
7. Time or Tel. No. (Max. 16 digits)
8. MMSI of ship in distress (10 digits or NULL)
9. Nature of distress (2 digits or NULL)
10. Acknowledgement (R=Acknowledge request B=Acknowledgement S=Neither (end of sequence)
11. Expansion indicator (E or NULL)
$CTDSE,x,x,a,xxxxxxxxxx,xx,c--c,..........,xx,c--c*hh<CR><LF>
1 2 3 4 5 6 7 8 9
1. Total number of sentences (fixed value)
2. Sentence number (fixed value)
3. Query/reply flag (fixed value A=Automatic)
4. Vessel MMSI (10 digits)
5. Data set ‘1’ (code field, fixed value 00)
6. Data set ‘1’ (data field, Enhanced position resolution, Max. 8 characters)
7. Additional data sets
*
8. Data set ‘n’ (code field)
*
9. Data set ‘n’ (data field)
*
*
: This equipment outputs only “Data set 1”.