RoyalTek RSA-1500L - Manual (Page 17)

16
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