Data Sheet

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Dat
a Sheet
GlobalTop Technology
Ver. V0
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Document #
VTG—Course and speed information relative to the ground
Table-9 contains the values for the following example:
$GPVTG,165.48,T,,M,0.03,N,0.06,K,A*37
Table
-
9: VTG Data Format
Name
Example
Units
Description
Message ID $GPVTG VTG protocol header
Course 165.48 degrees Measured heading
Reference T True
Course degrees Measured heading
Reference M Magnetic
(Need GlobalTop Customization
Service)
Speed 0.03 knots Measured horizontal speed
Units N Knots
Speed 0.06 km/hr Measured horizontal speed
Units K Kilometers per hour
Mode A A= Autonomous mode
D= Differential mode
E= Estimated mode
Checksum *06
<CR> <LF> End of message termination