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RoyalTek Confidential 19
REB-1315LPNX Operational Manual
Status A A=data valid or V=data not valid
Latitude 3723.2475 ddmm.mmmm
N/S Indicator N N=north or S=south
Longitude 12158.3416 dddmm.mmmm
E/W Indicator W E=east or W=west
Speed Over Ground 0.13 knots True
Course Over Ground
309.62 degrees
Date 120598 ddmmyy
Magnetic Variation degrees
Variation sense E=east or W=west (Not shown)
Mode A A=Autonomous, D=DGPS, E=DR
Checksum *10
<CR><LF> End of message termination
VTG-Course Over Ground and Ground Speed
Table 9 contains the values of the following example:
$GPVTG,79.65,T,,M,2.69,N,5.0,K,A*38
Table 9 VTG Data Format
Name Example Units Description
Message ID $GPVTG VTG protocol header
Course over rgound 79.65 degrees Measured heading
Reference T True
Course over ground degrees Measured heading
Reference M Magnetic
Speed over ground 2.69 Knots Measured speed
Units N Knots
Speed over ground 5.0 Km/hr Measured speed
Units K Kilometer per hour
Mode A A-autonomous, D=DGPS, E=DR
Checksum *38
<CR><LF> End of message termination
GLL-Geographic Position – Latitude/Longitude