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BWC To Selected Waypoint, Great Circle
1 2 3 4 5 6 7 8 9 10 11 12
BWC,XXXXXX,XXXX.XX,N,XXXXX.XX,W,XXX.,T,XXX.,M,XXX.X,N,CCCC
1 UTC of Bearing
2-3 Lat, N or S of waypoint
4-5 Long, E or W of waypoint
6-7 Bearing, True
8-9 Bearing, Magnetic
10-11 Distance, naut. miles
12 Waypoint identifier
GGA Global Positioning System Fix Data
1 2 3 4 5 6 7 8 9 1011
GGA, hhmmss.ss,111.11,a,yyyyy.yy,a,x,xx,x.x,x.x,M,x.x,
1213 14
M,x.x,xxxx*hh
1 UTC of Position
2-3 Latitude – N/S
4-5 Longitude - E/W
6 GPS Quality Indicator
0 = fix not available or invalid
1 = GPS Fix
2 = Differential GPS Fix
7 Number of satellites in use
8 Horizontal dilution of precision
9 Antenna altitude above/below mean sea level
10 Units of antenna altitude
11 Geoidal separation – difference between the
WGS-84 earth ellipsoid and mean sea level
(geoid), “-” = mean sea level below ellipsoid
12 Units of geoidal separation, meters.
13 Age of Differntial GPS data – Time in seconds
since last SC104 Type 1 or 9 update, null
field when DGPS is not used
14 Differential reference station ID, 0000-1023
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