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AP-3
APPENDIX 2 DIGITAL INTERFACE
Input sentences
DBT, DPT, GGA, GLL, GNS, HDG, HDT, MWV, RMC, ROT, VTG, ZDA
Output sentences
VBW, VDR, VHW, VLW, VTG
Data reception
Data is received in serial asynchronous form in accordance with the standard referenced in IEC
61162-2.
The following parameters are used:
• Baud rate
Input: 38,400 bps, IEC 61162-2-1, 4800 bps, IEC 61162-1-2
Output: Same as above. Baud rate fixed at 38400 bps for DS-600.
• Data bits: 8 (D7 = 0), Parity: none, Stop bits: 1
Data sentences: Input
Data format is IEC 61162-1 Edition 3 unless noted otherwise.
DBT - Depth below transducer
DPT - Depth
D0 D1 D2 D3 D4 D5 D6 D7
Start
bit
Stop
bit
Data bits
1, 2 Water depth, feet
3, 4 Water depth, m
5, 6 Water depth, fathom
$ ** DBT, x.x, f, x.x, M, x.x, F *hh <CR><LF>
1 2 3 4 5 6
$ ** DPT, x.x, x.x, x.x, *hh <CR><LF>
1 2 3
1. Water depth relative to transducer, in meters
2. Offset from transducer, in meters
3. Maximum range scale in use