You are on the right track. You will have to do some of your own coding in Nmea0183
In the
OpenCPN Manual under Advanced, find NMEA0183 and scroll down to GLL Sentence
https://opencpn.org/wiki/dokuwiki/do...tude_longitude
Looking at that, perhaps Eric Raymond's website is better
https://gpsd.gitlab.io/gpsd/NMEA.htm...itudelongitude
Example: $GNGLL,4404.14012,N,12118.85993,W,001037.00,A,A*67
Quote:
$--GLL,ddmm.mm,a,dddmm.mm,a,hhmmss.ss,a,m*hh
|
$--GLL,ddmm.mm(Latitiude),N(orS),dddmm.mm(Longitude), E(orW),hhmmss.ss(UTC),A,m*hh(Checksum)
Once you have the sentence worked out, you will need to get the right checksum at the end or OpenCPN will reject it. Use one of the
checksum calculators listed