Technical reference
Page 66
6.8.10 GNS - GNSS fix data
This sentence provides fix data for a single or combined satellite navigation system. The sentence provides
data for GPS, GLONASS and possible future satellite systems and combinations thereof.
6.8.11 HDT - Heading, true
Actual vessel heading in degrees produced by a true heading system or device.
3
hhmmss.ss
Time of position (UTC)
4
A
Status: A = data valid V = data invalid
5
a
Mode indicator:
A = Autonomous
D = Differential
E = Estimated (dead reckoning)
M = Manual input
S = Simulator
N = Data not valid
$-- GNS, hhmmss.ss, llll.ll, a, yyyyy.yy, a, c--c,xx,x.x,x.x,x.x,x.x,x.x *hh<CR><LF>
Field
number
Description
1
hhmmss.ss
Time of position (UTC)
2
llll.ll, a
Latitude N/S
3
yyyyy.yy, a
Longitude E/W
4
c--c
Mode indicator
5
xx
Number of satellites in use, 00-99 - NOT USED
6
x.x
Horizontal dilution of precision (HDOP) - NOT USED
7
x.x
Antenna altitude, m, above mean-sea-level - NOT USED
8
x.x
Geoidal separation, m - NOT USED
9
x.x
Age of differential data - NOT USED
10
x.x
Differential reference station ID - NOT USED
$--HDT, x.x, T*hh<CR><LF>
Field
number
Description
1
x.x, T
Heading, degrees true
$--GLL, llll.ll, a, yyyyy.yy, a, hhmmss.ss, A, a *hh<CR><LF>
Содержание AIS
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