Basic Operation of ECDIS-E ECDIS-E User Guide
3-10 65934012
GGA - GPS Quality indicator
Indicator Description Field Acronym
0 Fix not available or invalid -
1 GPS SPS
Normal
2 differential GPS
Differential
3 GPS Precise
Prcs
4 Real Time Kinematic
RTK
5 Real Time Kinematic Float
FRTK
6 Estimated dead reckoning
DR
7 Manual
MAN
8 Simulated -
Indicator values 0 and 8 are degraded values. No acronym
appears in the field but L/L values change to degraded colour
(yellowish orange).
A Loran-C device or an older GPS device may not provide position using
the GGA sentence. In this case the GLL sentence may be used. Quality
indicators when using the GLL sentence are shown in the table below.
GLL - system mode indicator
Indicator Description Field Acronym
A
Autonomous
Normal
D Differential
Differential
E Estimated dead reckoning
M Manual
MAN
S Simulated
-
N Not valid
-
Indicator values S and N are degraded values. No acronym
appears in the field but L/L values change to degraded colour
(yellowish orange).
To Next Page
Loading...
