GPVTG
Track made good and ground speed
$GPVTG,054.7,T,,M,005.5,N,010.2,K,A*48
where:
054.7,T True track made good (degrees)
,M Magnetic track made good (not implemented)
005.5,N 3D speed in knots (NOTE: Standard NMEA message is speed over ground (2D speed))
010.2,K 3D speed in KM/H (NOTE: Standard NMEA message is speed over ground (2D speed))
A Mode, A = GPS + Accelerometer, N = accelerometer only
*48 Checksum
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