Furuno GP-170 - APB-Heading;Track Controller (Autopilot) Sentence B; ARC-Alert Command Refused; BOD-Bearing Origin to Destination

APPENDIX 1 DIGITAL INTERFACE (IEC 61162-1 EDITION 4 (2010-11))
AP-8
APB-Heading/track controller (autopilot) sentence B
ARC-Alert command refused
BOD-Bearing origin to destination
$--APB,A,A,x.x,a,N,A,A,x.x,a,c--c,x.x,a,x.x,a,A,*hh<CR><LF>
1 2 3 4 5 6 7 8 9 10
11 12131415
1. Status (A=Data valid V=LORAN-C blink or SNR warning
V=general warning flag for other navigation systems
when a reliable fix is not available)
2. Status (A=OK or no use V=LORAN-C cycle lock warning flag)
3. XTD (cross-track distance) Magnitiude
4. Direction to steer, L or R
5. XTD units, N=nautical miles
6. Status (A=arrival circle entered V=arrival circle not passed)
7. Status (A=perpendicular passed at waypoint V=perpendicular not entered)
8. Bearing origin to destination
9. M=Magnetic, T=True
10. Destination waypoint ID
11. Bearing, present position to destination
12. M=Magnetic, T=True
13. Heading to steer to destination waypoint
14. M=Magnetic, T=True
15. Mode indicator (A=Autonomous mode D=differential mode S=Simulator mode)
$**ARC,hhmmss.ss,aaa,x.x,x.x,c*hh<CR><LF>
1 2 3 4 5
1. Release time of the Alert Command Refused(UTC)
2. Used for proprietary alerts, defined by the manufacturer
3. The alert identifier(1-9999999)
4. The alert instance(1to-99)
5. Refused Alert Command(A, Q, O, S)
A=acknowledge: A
Q=request/repeat information
O=responsibility transfer
S=silence
$**BOD,x.x,T,x.x,M,c--c,c--c,*hh<CR><LF>
1 2 3 4 5 6
1. Bearing, degrees
2. True
3. Bearing, degrees
4. Magnetic
5. Destination waypoint ID (Max. 13 characters)
6. Origin waypoint ID (Max. 13 characters)