Furuno INMARSAT-C FELCOM 18 Operator's Manual page 164

APPX. 6 DIGITAL INTERFACE
GNS: GNSS fix data
$**GNS,hhmmss.ss,llll.lll,a,IIIII.III,a,c--c,xx,x.x,x.x,x.x,x.x,x.x,a*hh<CR><LF>
1
1. UTC of position (no use)
2. Latitude (0.00000 - 9000.00000)
3. N/S
4. Longitude (0.00000 - 18000.00000)
5. E/W
6. Mode indicator
N=No fix A=Autonomous D=Differential P=Precise R=Real Time Kinematic
F=Float RTK E=Estimated Mode M=Manual Input Mode S=Simulator Mode
7. Total number of satellites in use (00 - 99), No use
8. HDOP (0.0 - 999.99), No use
9. Antenna altitude, meters (-999.99 - 9999.99), No use
10. Geoidal separation (-999.99 - 9999.99), No use
11. Age of differential data (0 - 999), No use
12. Differential reference station ID (0000 - 1023), No use
13. Navigational status Indicator. No use
GSA: GNSS DOP and active satellites
$**GSA,a,x,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,x.x,x.x,x.x,a*hh<CR><LF>
1 2
1. Mode (M=manual, forced to operate in 2=2D 3=3D mode
A=automatic, allowed to automatically switch 2D/3D)
2. Mode (1=fix not available 2=2D 3=3D)
3. ID number of satellites used in solution (01 - 96, NULL)
4. PDOP (0.00 - 999.99)
5. HDOP (0.00 - 999.99)
6. VDOP (0.00 - 999.99)
7. GNSS System ID
MTW: Water temperature
$**MTW,x.x,C*hh<CR><LF>
1 2
1. Water temperature (-9.999 - 99.999)
2. Degrees C
RMA: Recommended minimum specific Loran-C data
$**RMA,A,llll.ll,a,yyyyy.yy,a,x.x,x.x,x.x,x.x,x.x,a,a*hh <CR><LF>
1 2 3 4
1. Status: A=data valid, V=blink, cycle or SNR warning
2. Latitude, degrees (0.0000 - 9000.0000)
3. N/S
4. Longitude, degrees (0.0000 - 18000.0000)
5. E/W
6. Time difference A, microseconds (0.0 - 99999.9), No use
7. Time difference B, microseconds (0.0 - 99999.9), No use
8. Speed over ground, knots (0.0 - 9999.9)
9. Course over ground, degrees true (0.0 - 359.9)
10. Magnetic variation, degrees (0.0 - 180), No use
11. E/W
12.
Mode indicator (A= Autonomous D= Differential mode E=Estimated (dead reckoning mode)
M=Manual input mode S= Simulator N=Data not valid)
AP-30
2 3 4 5 6 7 8 9 10 11 12 13
3
5 6 7 8 9 10 1112
4 5 6 7