Operator's Manual

APPENDIX 4 DIGITAL INTERFACE
AP-12
VBW - Dual ground/water speed
VHW - Water speed and heading
VLW - Dual ground/water distance
VTG - Course over ground and ground speed
$--VBW, x.x, x.x, A, x.x, x.x, A, x.x, A, x.x, A*hh<CR><LF>
Checksum
Status: stern ground speed,
A=data valid V=data invalid
Stern transverse ground speed, knots
Status: stern water speed, A=data valid, V=data invalid
Stern transverse water speed, knots
Status: ground speed, A=data valid V=data invalid
Transverse ground speed, knots
Longitudial ground speed, knots
Status: water speed, A=data valid, V=data invalid
Transverse water speed, knots
Longitudinal water speed, knots
$--VHW, x.x, T, x.x, M, x.x, N, x.x, K *hh<CR><LF>
Checksum
Speed, km/h
Speed, knots
Heading, degrees magnetic
Heading, degrees true
$ -- VLW, x.x, N, x.x, N, x.x, N, x.x, N*hh<CR><LF>
Checksum
Ground distance since reset, nautical miles
Total cumulative ground distance, nautical miles
Water distance since reset, nautical miles
Total cumulative water distance, nautical miles
$ -- VTG, x.x, T, x.x, M, x.x, N, x.x, K, a*hh<CR><LF>
Checksum
Mode indicator ( see Note)
Note: A=Autonomous, D=Differential, E=Estimated (dead reckoning), M=Manual input,
S=Simulator, N=Data not valid
Speed over ground, km/h
Speed over ground, knots
Course over ground, degrees magnetic
Course over ground, degrees true