Some units when the DOP is too high...
I can see right now (at home) the GPS reports a PDOP value 0.9 indoors, I'll check this value on the boat
next time, and see what happens when freezes, thanks for the tip.
It's an OEM module, for now I don't see firmware update capabilities, I'll search info about this topic, may be there is something there.
Yes indeed, sailing in the Paraná River 2-3 knots against
Thank you all for your advices