San Jose Navigation SANAV FV-M7 - Manual (Page 24)

24
VTG – Course Over Ground and Ground Speed
This message transmits the speed and course relative to ground.
$GPVTG,vtg1,vtg2,vtg3,vtg4,vtg5,vtg6,vtg7,vtg8,vtg9*hh
R>
Parameters Descriptions Notes
vtg1 Course over ground (degrees) Referenced to true north (xx.xx o )
vtg2 Indicator of course reference T – true north
vtg3 Course over ground (degrees) Not Support
vtg4 Indicator of course reference M – magnetic north
vtg5 Speed over ground x.xxx knots
vtg6 Unit of speed N – nautical miles per hour
vtg7 Speed over ground x.xxx km/hr
vtg8 Unit of speed K – kilometers per hour
vtg9 Navigation mode indicator
A – Autonomous mode (fix);
D – Differential mode (fix);
E – DR (fix);
N – not valid
hh Checksum hex number (2 – character)
End of message