Simrad TV80, Reference Manual

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406388/B
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Tip
If you need the depth below the keel, use the NMEA DBK datagram. If you need the depth
below the transducer, use the NMEA DBT datagram.
NMEA GGA datagram
The NMEA GGA datagram transfers the time, position and fix related data from a global
positioning system (GPS).
Format
$--GGA,hhmmss.ss,llll.ll,a,yyyyy.yy,a,x,zz,d.d,a.a,M,g.g,M,r.r,cccc*hh
Description
1
$—
: Talker identifier
2
GGA
: Datagram identifier
3
hhmmss.ss
: Coordinated Universal Time (UTC) of the current position
4
llll.ll,a
: Latitude North/South (Degrees, minutes and hundredths)
N = North
S = South
5
yyyyy.yy,a
: Longitude East/West (Degrees, minutes and hundredths)
E = East
W = West
6
x
: Quality indicator for the GPS (Global Positioning System)
Refer to the NMEA standard for further information of the GPS quality indicator.
7
zz
: Number of satellites in use (00 - 12)
The number of satellites may be different from the number in view.
8
d.d
: HDOP (Horizontal dilution of precision)
9
a.a,M
: Altitude related to mean sea level (geoid) (Metres)
10
g.g,M
: Geoidal separation (Metres)
11
r.r
: Age of GPS (Global Positioning System) data
12
cccc
: Differential reference station identification (0000 - 1023
13
*hh
: Checksum
Datagram formats