Hi @geotimege,
I’ve done a bit more testing on it too. When I used Reach base, I indeed didn’t see the 1230 RTCM3 message in the NTRIP checker. However, when I checked incoming messages on the rover, it was there. So it should work fine:
This and the fact that you saw 1230 message when using another base confirms that there is no effect on it from the Emlid Caster side. In general, Emlid Caster doesn’t have restrictions for the data formats and particular messages.
I searched for more info about it, and it seems to be quite rare in use. I’ve noted your request for it. But at the moment, we don’t have plans for this message.