Nmea Vlw Datagram; Nmea Vtg Datagram - Simrad TV80 Reference Manual

Simrad TV80 Reference Manual

NMEA VLW datagram

The NMEA VLW datagram contains the travelled distance of the vessel.
Format
$--VLW,x.x,N,y.y,N,z.z,N,g.g,N*hh<CR><LF>
Description
1 : Talker identifier
$—
2 : Datagram identifier
VLW
3 : Water distance, Total cumulative (Nautical miles)
x.x,N
4 : Water distance, Since reset (Nautical miles)
y.y,N
5 : Ground distance, Total cumulative (Nautical miles)
z.z,N
6 : Ground distance, Since reset (Nautical miles)
g.g,N
7 : Checksum
*hh

NMEA VTG datagram

The NMEA VTG datagram contains the actual course and speed relative to the ground.
Format
$--VTG,x.x,T,y.y,M,z.z,N,g.g,K,a*hh<CR><LF>
Description
1 : Talker identifier
$—
2 : Datagram identifier
VTG
3 : Course over ground (Degrees True)
x.x,T
4 : Course over ground (Degrees Magnetic)
y.y,M
5 : Speed over ground (knots)
z.z,N
6 : Speed over ground (km/hr)
g.g,K
282
406388/B