D Logs Summary
170 MiLLennium GPSCard SW Version 4.503/4.52 Command Descriptions Manual Rev 2
GPVTG Track Made Good And Ground Speed

The track made good and speed relative to the ground.

Structure:
Example:
$GPVTG,24.168,T,24.168,M,0.4220347,N,0.781608,K*7A[CR][LF]
$GPVTG track true T track mag M speed Km
Nspeed km K*xx [CR][LF]
Field Structure Field Description Symbol Example
1$GPVTG Log header $GPVTG
2track true Track made good, degrees True x.x 24.168
3 T True track indicator T T
4track mag Track made good, degrees Magnetic;
Track mag = Track true + (MAGVAR correction)
See the MAGVAR command, Page 108.
x.x 24.168
5 M Magnetic track indicator M M
6speed Kn Speed over ground, knots x.x 0.4220347
7 N Nautical speed indicator (N = Knots) N N
8speed Km Speed, kilometers/hour x.x 0.781608
9 K Speed indicator (K = km/hr) K K
10 *xx Checksum *hh *7A
11 [CR][LF] Sentence terminator [CR][LF]