Simrad TV80, Reference Manual

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406388/B
NMEA GLL datagram
The NMEA GLL datagram transfers the latitude and longitude of vessel position, the time of
the position fix and the current status from a global positioning system (GPS).
Format
$--GLL,llll.ll,a,yyyyy.yy,a,hhmmss.ss,A,a*hh<CR><LF>
Description
1
$—
: Talker identifier
2
GLL
: Datagram identifier
3
llll.ll,a
: Latitude North/South (Degrees, minutes and hundredths)
N
= North
S
= South
4
yyyyy.yy,a
: Longitude East/West (Degrees, minutes and hundredths)
E
= East
W
= West
5
hhmmss.ss
: Coordinated Universal Time (UTC) of the current position
6
A
: Status
A
= The data are valid.
V
= The data are not valid.
7
a
: Mode indicator
8
*hh
: Checksum
NMEA HDG datagram
The NMEA HDG datagram provides heading from a magnetic sensor. If this reading is
corrected for deviation it produces the magnetic heading. If it is offset by variation, it
provides the true heading.
Format
$--HDG,x.x,z.z,a,r.r,a*hh<CR><LF>
Simrad TV80 Reference Manual