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RSA-1500L User Manual
Course Over
Ground
309.62 degrees
True
Date 120598 ddmmyy
Magnetic Variation
degrees
E=east or W=west
Mode A A=Autonomous, D=DGPS, E=DR
Checksum *10
2.1.6 VTG-Course Over Ground and Ground Speed
Table 2-10 contains the values of the following example:
$GPVTG, 309.62, T, , M, 0.13, N, 0.2, K*6E
Table 2-10 VTG Data Format
Name Example
Units Description
Message ID $GPVTG
VTG protocol header
Course 309.62 degrees
Measured heading
Reference T True
Course degrees
Measured heading
Reference M Magnetic
Speed 0.13 knots Measured horizontal speed
Units N Knots
Speed 0.2 km/hr Measured horizontal speed
Units K Kilometer per hour
Mode A A=Autonomous, D=DGPS, E=DR
Checksum *6E
＜CR＞＜LF＞ End of message termination