Erm yes and no. There is an osd item for vehicle_gps_satnum, but I've not managed to get it to show me any information. I have however updated the wiki: http://wiki.navit-project.org/index....ration_options
To show the display options I'm now using for my n810 Basically setting out the various OSD items and making everything much bigger than the default.
This is what I'd hoped to achieve, and as I suspect I just needed to read the code enough to figure out what was already there, rather than having to add anything new.
I'll keep reading to find out what else I can confgirue.