Furuno BACK GP-80 - Manual (Page 79)

A-7
APB - Autopilot sentence data
$--APB,A,A,x.x,a,N,A,A,x.x,a,c--c,x.x,a,x.x,a,a*hh<CR><LF>
| | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | +------- 13
| | | | | | | | | | | | | | +--------- 12
| | | | | | | | | | | | +--+----------- 11
| | | | | | | | | | +--+----------------- 10
| | | | | | | | | +------------------------ 9
| | | | | | | +--+---------------------------- 8
| | | | | | +---------------------------------- 7
| | | | | +------------------------------------ 6
| | | | +-------------------------------------- 5
| | | +---------------------------------------- 4
| | +------------------------------------------- 3
| +---------------------------------------------- 2
+------------------------------------------------ 1
1. Status: A=Data varid 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 not used
V=LORAN-C cycle lock warning flag
3. Magnitude of XTE(cross-track-eror)
4. Direction to steer,L/R
5. XTE units, 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, M/T
9. Destination waypoint ID
10. Bearing, present potition to destination, magnetic or true
11. Heading to steer to destination waypoint, magnetic or true
12. Mode indicator(see Note)
13. Checksum
NOTE Positioning system Mode indicator:
A = Autonomous mode
D = differential mode
S = Simulator mode
N = Data not valid