APPX. 6 DIGITAL INTERFACE
AP-32
VDO: UAIS VHF data-link own-vessel report
VDR: Set and drift
VTG: Course over ground and ground speed
WPL: Waypoint location
ZDA: Time and date
!**VDO,x,x,x,x,s--s,x*hh<CR><LF>
12 3 4 5 6
1. Total number of sentences needed to transfer the message (1 to 9)
2. Message sentence number (1 to 9)
3. Sequential message identifier (0 to 9, NULL)
4. AIS channel Number (A or B)
5. Encapsulated ITU-R M.1371 radio message (1 - 63 bytes)
6. Number of fill-bits (0 to 5)
$**VDR,x.x,T,x.x,M,x.x,N*hh <CR><LF>
1 2 3 4 5 6
1. Direction, degrees (0.0 - 360.0)
2. T=True (fixed)
3. Direction, degrees (0.0 - 360.0)
4. M=Magnetic (fixed)
5. Current speed (0 - 99.99)
6. N=Knots (fixed)
$**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 (0.0 - 359.9)
2. T=True (fixed)
3. Course over ground, degrees (0.0 - 359.9)
4. M=Magnetic (fixed)
5. Speed over ground, knots (0.00-9999.9)
6. N=Knots (fixed)
7. Speed over ground (0.00 - 9999.9)
8. K=km/h (fixed)
9. Mode indicator (
A=Autonomous, D=Differential E = Estimated (dead reckoning)
M=Manual input S=Simulator N=Data not valid)
$**WPL,llll.ll,a,yyyyy.yy,a,c--c*hh<CR><LF>
1 2 3 4 5
1. Waypoint latitude (0.000000 - 9000.00000)
2. N/S
3. Waypoint longitude (0.00000 - 18000.00000
4. E/W
5. Waypoint identifier (No use)
$**ZDA,hhmmss.ss,xx,xx,xxxx,xx,xx<CR><LF>
1 2 3 4 5 6
1. UTC (000000.00 - 240001.00)
2. Day (01 - 31)
3. Month (01 -12)
4. Year (UTC, 0000 - 9999)
5. Local zone, hours (-13 to
±
13), No use
6. Local zone, minutes (00 to
±
59), No use
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