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APPENDIX 2 DIGITAL INTERFACE
AP-6
VTG - Course over the ground and ground speed
ZDA - Time and date
Data sentences: Output
VBW - Dual ground/water speed
$ ** VTG, x.x, T, x.x, M, x.x, N, x.x, K, a *hh <CR><LF>
1 2 3 4 5 6 7 8 9
1. Course over ground, degrees true
2. T
3. Course over ground, degrees magnetic (no use)
4. M (no use)
5. Speed over ground, knots
6. N
7. Speed over ground, km/h
8. K
9. Mode indicator (
A=Autonomous, D=Differential, S=Simulator)
$ ** ZDA, hhmmss.ss, xx, xx, xxxx, xx, xx *hh <CR><LF>
1 2 3 4 5 6
1. UTC
2. Day, 01 to 31(UTC)
3. Month, 01 to 12(UTC)
4. Year(UTC)
5. Local zone hours, 00 to ±13
6. Local zone minutes, 00 to +59
$ ** VBW, x.x, x.x, A, x.x, x.x, A, x.x, A, x.x, A, *hh <CR><LF>
1 2 3 4 5 6 7 8 9 10
1. Longitudinal water speed, knots
2. Transverse water speed, knots
3. Status: water speed (A=data valid, V=data invalid)
4. Longitudinal ground speed, knots
5. Transverse ground speed, knots
6. Status: ground speed (A=data valid, V=data invalid)
7. Stern water speed, knots
8. Status: stern water speed (A=data valid, V=data invalid)
9. Stern transverse ground speed, knots
10. Status: stern transverse ground speed (A=data valid, V=data invalid)