JRC JLN-900 - Water Speed and Heading (-VHW); Distance Travelled through the Water and over the Ground (-VLW)

11-14
3.1.12 Water speed and heading (--VHW)
1 2 3 4 5 6 7 8 9 A
$--VHW,x.x,T,x.x,M,x.x,N,x.x,K*hh<CR><LF>
Field # Field Type Definition Note
1
Name
Water-referenced and ground-
referenced speed data
VDVHW
2
x.x
Heading
3
T
Degrees true
4
x.x
Heading
5
M
Degrees magnetic
6
x.x
Speed
7
N
Knots
8
x.x
Speed
9
K
Km/h
A
hh
Check sum
3.1.13 Distance travelled through the water and over the ground (--VLW)
Note that this sentence was extended. Older systems might still transmit the shorter version of
the sentence with only the first five fields plus the checksum field.
1 2 3 4 5 6 7 8 9 A
$--VLW,x.x,T,x.x,T,x.x,T,x.x,T *hh<CR><LF>
Field # Field Type Definition Note
1
Name
Distance through water VDVLW
2
x.x
Total water distance [nautical
miles]
minimum range 9999.9
3
T
Type N = Nautical mile
4
x.x
Trip water distance [nautical
miles]
5
T
Type N = Nautical mile
6
x.x
Total ground distance [nautical
miles]
minimum range 9999.9
7
T
Type N = Nautical mile
8
x.x
Trip ground distance [nautical
miles]
9
T
Type N = Nautical mile
A
hh
Checksum