9
Function and Operation
GPS Data Input--VTG
$--VTG, x.x,T , x.x,M , x.x,N , x.x,K , a*hh<CR><LF>
1
2
3
4
5
6
(1) Course over ground, degree true
(2) Course over ground, degree magnetic
(3) Speed over ground, knots
(4) Speed over ground, km/h
(5) Mode indicator
，
A=Autonomous mode
D=Differential mode
E=Estimated
（
dead reckoning
）
mode
M=Manual input mode
S=Simulator mode
N=Data not valid
(6) Checksum value
Speedlog Data Input--VBW
$--VBW, x.x , x.x , A , x.x , x.x , A , x.x , A , x.x , A*hh<CR><LF>
1 2
3
4 5
6
7
8
9
10 11
(1) Longitudinal water speed, Knots
(2) Transverse water speed, Knots
(3) Status
：
water speed, A=data valid, V=data invalid
(4) Longitudinal ground speed, Knots
(5) Transverse ground speed, Knots
(6) Status
：
ground speed, A=data valid, V=data invalid
(7) Stern transverse water speed, Knots
(8) Status
：
stern water speed, A=data valid, V=data invalid
(9) Stern transverse ground speed, Knots
(10)
Status
：
stern ground speed, A=data valid, V=data invalid
(11)
Checksum value
