AP-27
APPENDIX 6 DIGITAL INTERFACE
Digital Interface
Input sentences: BWC, BWR, DBT, DTM, GGA, GLL, GNS, GSA, MTW, RMA, RMB, RMC,
VDO, VDR, VTG, WPL, ZDA
Output sentences: None
Data reception
Data is received in serial asynchronous form in accordance with the standard referenced in IEC
61162-1 Ed.4 2010-11. The following parameters are used:
Baud rate: 38,400 bps (VDO). The baud rate of all other sentences is 4800 bps.
Data bits: 8 (D7 = 0), Parity: none, Stop bits: 1
Data Sentences
Input sentences
BWC: Bearing and distance to waypoint
D0 D1 D2 D3 D4 D5 D6 D7
Start
bit
Stop
bit
Data bits
$ **BWC,hhmmss.ss,llll.ll, a,IIIII.II,a,yyy.y,T, yyy.y,M,yyy.y,N,c--c,A,*hh<CR><LF>
1 2 3 4 5 6 7 8 9 10 11 12 13
1. UTC of observation (000000.00 - 240001.00)
2. Waypoint latitude (0.00000 - 9000.00000)
3. N/S
4. Waypoint longitude (0.00000 - 18000.00000)
5. E/W
6. Bearing, degrees true (0.00 - 360.00)
7. Unit, True
8. Bearing, degrees (0.00 - 360.00)
9. Unit, Magnetic
10. Distance, nautical miles (0.000 - 10000)
11. Unit , N
12. Waypoint ID (Max. 13 characters)
13. Mode Indicator* (A=Autonomous D=Differential E= Estimated M=Manual S=Simulator)
* Ver. 3.0 only
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