Furuno GP-170 - 5.3 Calculating Distance, Bearing, and TTG

APPENDIX 1 DIGITAL INTERFACE (IEC 61162-1 EDITION 4 (2010-11))
AP-16
VDR-Set and drift
VHW-Water speed and heading
VTG-Course over ground and ground speed
WCV-Waypoint closure velocity
WNC-Distance waypoint to waypoint
$**VDR,x.x,T,x.x,M,x.x,N,*hh <CR><LF>
1 2 3 4 5 6
1. Direction, degrees
2. T=True (fixed)
3. Direction, degrees
4. M=Magnetic (fixed)
5. Current speed
6. N=Knots (fixed)
$GPVHW,x.x,T,x.x,M,x.x,N,x.x,K,*hh <CR><LF>
1 2 3 4 5 6 7 8
1. Heading, degrees
2. T=True (fixed)
3. Heading, degrees
4. M=Magnetic (fixed)
5. Speed, knots
6. N=Knots (fixed)
7. Speed, knots
8K
=
km/hr (fixed)
$GPVTG,x.x,T,x.x,M,x.x,N,x.x,K,a,*hh <CR><LF>
1 2 3 4 5 6 7 8 9
1. Course over ground, degrees
2. T=True (fixed)
3. Course over ground, degrees
4. M=Magnetic (fixed)
5. Speed over ground, knots
6. N=Knots (fixed)
7. Speed over ground
8. K=km/h (fixed)
9. Mode indicator (
A=Autonomous, D=Differential E = Estimated (dead reckoning)
M=Manual input S=Simulator N=Data not valid)
$WCV,x.x,N,c--c,a*hh<CR><LF>
1 2 3
1. Velocity component, knots
2. Waypoint identifier
3. Mode indicator (
A=Autonomous, D=Differential, S=Simulator, N=Data not valid)
$WNC,x.x,N,x.x,K,c--c,c--c*hh<CR><LF>
1 2 3 4
1. Distance, nautcal miles
2. Distance, km
3. To waypoint identifier
4. FROM waypoint identifier