POS MV V5 Installation and Operation Guide
Interfaces
and Data Formats
3-6
$xxGGK,hhmmss.ss,mmddyy,llll.llllllll,a,yyyyy.yyyyyyyy,b,t,nn,v.v,x.xxx,M*hh<CRLF>
Table 14: $xxGGK Sentence Format
Item
Definition
Value
Units (If Applicable)
T
GNSS quality
indicator
0 = fix not available or invalid
1 = C/A standard GNSS; fix valid
2 = RTK float
3 = RTK fixed
4 = DGNSS mode; fix valid
5 = free inertial
nn
Number of
satellites used
in GNSS
solution
0 to 32
v.v
DOP of fix
x.xxx
Ellipsoid height
of fix (vessel
height above
WGS84
ellipsoid)
N/A
metres|decimal metres
1 fixed digit for metres
3 fixed digits for decimal metres
M
Ellipsoid height N/A
metres
*hh
Checksum
<CRLF>
Carriage return
and line feed
<CRLF>
$xxHDT: Heading - True Data
True vessel heading is in degrees. POS MV supplies information in the following ASCII NMEA
0183 sentence format.
$xxHDT,xxx.x,T*hh<CRLF>
Table 15: $xxHDT Sentence Format
Item
Definition
Value
Units (If Applicable)
$xxHDT
Header
$xxHDT
xxx.x
True vessel
heading in the
vessel frame
000.0 to 359.9 degrees|decimal degrees
3 fixed digits for degrees
1 digit for decimal degrees
T
True
T
*hh
Checksum
N/A
<CRLF>
Carriage return
and line feed
<CRLF>