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APPENDIX
AP-16
VTG - Course over ground and ground speed
Output sentences
ABK - UAIS addressed and binary broadcast acknowledgement
ACA - See "ACA - AIS regional channel assignment message" on page AP-10
ACS - Channel management information source
ALR - Set alarm state
LRF - See "LRF - Long-range function" on page AP-13
$--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. (No use) Course over ground, degrees (0.0 - 359.9)
4. (No use) 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 mode, D=Differential mode, E= Estimated (dead reckoning) mode
M=Manual input mode, P=Precise, S=Simulator mode, N=Data not valid)
$**ABK,xxxxxxxxx,x,x.x,x,x,*hh<CR><LF>
1 2 3 4 5
1. MMSI of the addressed AIS unit
2. AIS channel of reception
3. Message ID
4. Message sequence number
5. Type of acknowledgement
$**ACS,x,xxxxxxxxx,hhmmss.ss,xx,xx,xxxx,*hh<CR><LF>
1 2 3 4 5 6
1. Sequence number (0 - 9)
2. MMSI of originator
3. UTC at receipt of channel management information
4. UTC day (01 - 31)
5. UTC month (01 - 12)
6. UTC year
$**ALR,hhmmss.ss,xxx,A,A,c—c,*hh<CR><LF>
1 2 3 4 5
1. Time of alarm condition change, UTC
2. Unique alarm number (identifier) at alarm source (000 - 999)
3. Alarm condition (A=threshold exceeded, V=not exceeded)
4. Alarm acknowledge state (A=acknowledged, V=not acknowledged)
5. Alarm description text (alphanumeric)