RoyalTek REV-2000 User Manual download pdf (Page 21)

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

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RoyalTek REV-2000 User Manual Page 21