"Pascal" wrote in message
oups.com...
By the way, I have another little doubt: looking again to my own
report, the NMEA messages sent by my Map276C, I found that the
Lat/Long showed by BWC and RMB agree 100%, but are not equal to the
lat/long showed by messages RMC and GLL. See below:


$GPGLL,1248.7047,S,03827.5797,W,010001,A,A*41
$GPBWC,010001,1248.4128,S,03827.6978,W,338.4,T,1.5 ,M,0.314,N,BA01,A*6
3
$GPRMC,010003,A,1248.7047,S,03827.5797,W,0.0,94.9, 290505,23.0,W,A*03
$GPRMB,A,0.04,L,AIC,BA01,1248.4128,S,03827.6978,W, 0.314,338.4,,V,A*33

That's because the GLL and RMC sentence show your current position while the
BWC and RMB show the position of a destination waypoint.

Meindert