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Autopilot sentence "B"
Commonly used b y autopilots, this sentence contains navigation receiver
update status, cross-track error, initial bearing f r o m origin waypoint t o the next
destination waypoint in the sailplan, continuous bearing from present position
t o destination and recommended heading t o steer t o destination waypoint for
the active navigation leg o f the sailplan. The sentence
alarm is n o t in alarm condition.
f i e l d : 2 3
5 6
4
a ,
explanation:
Status
A
3. n o t used, always
4. Magnitude o f XTE (cross-track-error)
5. Direction t o steer, L or R
6.
XTE units, N for nautical miles
7. and 8. not transmitted (empty fields)
9.
Bearing origin t o destination
1 1. Destination waypoint identifier
13. Magnetic, M
14. Heading-to-steer t o destination waypoint
15. Magnetic, M
Time (UTC) and distance & bearing to, and location of, the fist destination
Waypoint in the sailplan from present position. Only one of the t w o sentences
is transmitted, determined b y the RL/GC selection in
f i e l d :
2
explanation:
2. UTC
of observation
3.
Waypoint Latitude
4. North or South, N/S
5. Waypoint longitude
6. East or West, E/W
7.
Bearing from present position t o Waypoint
8. Degrees true, T
9.
Bearing from present position t o Waypoint
12. Nautical miles, N
13. Waypaint identifier
1 2 1 3 14
9
10 11
, ,
N,
M ,
C C C , XXX,
or V, A i f updating is OK, V if updating is stopped
A
t o Waypoint - Great Circle
Waypoint
to
6 7
is
transmitted when a
15
Rhumb Line
-
t
8 9 1 0 1 1
1 2
N, c c c < C R > c L F >
14
1 3
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