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M Mode indicator
A=autonomous
N=data not valid
*hh Check sum
<CR><LF>
End
Ex:$GPGLL,6016.3073,N,02458.3817,E,090110.10,A,A*61
$GPVTG,h.h,T,m.m,M,s.s,N,s.s,K,M*hh<CR><LF>
h.h Heading in degrees.
T Letter 'T' denoting True heading in degrees.
m.m Magnetic heading in degrees.
M Letter 'M' denoting Magnetic heading in degrees.
s.s Speed in knots.
N Letter 'N' denoting speed in knots.
s.s Speed, km/h.
K Letter 'K' denoting speed in km/h.
M Mode indicator
A=autonomous
N=data not valid
*hh Check sum
<CR><LF>
End
Ex:
$GPVTG,202.6,T,208.7,M,0.38,N,0.7,K,A*0D