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RMC Time, latitude, longitude, speed over ground, course over
ground, and date.
VTG Track (magnetic and true) and groundspeed (knots and KPH).
OUTPUT DATA FORMAT
APA Autopilot Format A
1 2 3 4 5 6 7 8 9 10
APA,A,A,X.XX,L,N,A,A,XXX.,M,CCC
1 OR’ed Blink and SNR (A = valid, V = invalid)
2 Cycle Lock (A = valid, V = invalid)
3-5 Cross Track, Sense (L = steer left, R = steer
Right), N.Mi. Units
6-7 Arrival Circle, Arrival Perpendicular (crossing
of the line which is perpendicular to the course
line and which passes through the destination
waypoint.
8-9 Bearing dest. wpt. from origin wpt., Magnetic
10 Dest wpt. identifier
APB Autopilot Sentence “B”
1 2 3 4 5 6 7 8 9 10 11 12 13 14
APB,A,A,x.x,a,N,A,A,x.x,a,c—c,x.x,a,x.x,a*hh
1 Status: V = Loran-C Blink or SNR warning
A = general warning flag for other
navigation systems when a
reliable fix is not available.
2 Status: V = Loran-C cycle lock warning flag
A = OK or not used
3 Magnitude of XTE
4 Direction to steer (L, R)
5 XTE units, nautical miles
6 Status: A = arrival circle entered
7 Status: A = perpendicular passed at waypoint
8-9 Bearing origin to destination, M/T
10 Destination waypoint ID
11-12 Bearing, present position to destination,
Magnetic or True
13-14 Heading to steer to destination waypoint,
Magnetic or True