Fugro 8200HP - VTG - Course over Ground and Ground Speed; Table 24: Description of the VTG Message

OmniSTAR 8200HP User Manual
Issue 1.07, 10/2008
69
VTG – Course Over Ground and Ground Speed
The VTG (Velocity True Ground) message identifies the actual track made
good and speed over ground.
$GPVTG,t,T,,,n.nn,N,k.kk,K
Field Number Description
1 Track made good
2 Fixed text ‘T’ shows that track made good is
relative to true north
3 Not used
4 Not used
5 Speed over ground in knots (0-3 decimal places)
6 Fixed text ‘N’ shows that speed over ground is in
knots
7 Speed over ground in kilometers/hour (0-3
decimal places)
8 Fixed text ‘K’ shows that speed over ground is in
kilometers/hour
Table 24: Description of the VTG message.
NOTE:
 Because the contents of this NMEA message do not change significantly
during a 1-second interval, the receiver outputs this message at a
maximum rate of 1 Hz.