Hi, I walk through datasheets of the different GPS modules, and I have some questions :- velocicy/speed provided in the NMEA messages are they always doppler speed, or can they be for some modules derived from positions ? - some modules claim a 0,1…

Dear all, I'm considering to build a Arduino/GPS+someting device to have precise feedback about about Velocity and Velocity Made Good on my catamaran. The boat is a small hightech catamaran…