Chapter 11
KGP-920
Technical Reference
Description Contents of data field
Heading / Track controller (auto pilot) sentence B
GPAPB
Bearing origin to destination
$ GP APB, A, A, x.x, a, N, A, A, x.x, a, c--c, x.x, a, x.x, a, a*hh<CR><LF>
Mode indicator
A: Autonomous
D: Differential
M: Manual input
S: Simulator
N: Data not valid
Bearing, present position to
destination, magnetic or true
Heading to steer to destination
waypoint, magnetic true
Bearing origin to destination, M/T
Destination waypoint ID
A = perpendicular passed at waypoint
V = perpendicular not passed
A =
arrival circle entered
V =
arrival circle not passed
Direction to steer, L/R
XTE units, nautical miles
Magnitude of XTE (cross-track-error)
A = O.K. or not used
V = LORAN-C cycle lock warning flag
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
Sentence type
Talker device
Start of sentence
GPBOD
$ GP BOD, x.x, T, x.x, M, c--c, c--c*hh <CR><LF>
Destination waypoint ID
Start of sentence
Talker device
Sentence type
Origin waypoint ID
Bearing, degrees magnetic
Bearing, degrees true
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