@kodiakbare
jmmt is correct that the 276C & 376C are similar. In fact they are identical other than 276C lacks SiriusXM Weather & Radio capability.

They both certainly are NT map capable. Therefore, i guess when you say 'Problem #3: Being that it's "old technology", new NT maps will not load due to data card size limitation of 512Mb' you mean only that it's impossible to load a full CNNT NA due to the limitation of the data card's size. You could get a NAND upgrade but that would only increase the capacity to 2GB and all NA's now well over that with latest maps anyway. Look here if interested: [Only registered and activated users can see links. ] [post#25].

Quote Originally Posted by alexisf View Post
Thanks vm guys! I actually saw this video [Only registered and activated users can see links. ]
which apparently I can have a 2g memory.. I will keep you posted with any developments.



Thanks again!
Otherwise, do as suggested and load a partial NA but using MapInstall not MapSource because MS can cause routing errors when compiling image files from large modern CNNT gmap folders.

See [Only registered and activated users can see links. ] and [Only registered and activated users can see links. ] generally for map unlocking and compiling tips.

I think your plotter only has a limited internal flash memory anyway so there's maybe no way to flash detail maps to it as there is for other GPSMAP units as explained here [Only registered and activated users can see links. ] and here [Only registered and activated users can see links. ] and Page 4 here [Only registered and activated users can see links. ] for more info on region flashing of detail maps in 'old-style' devices. You could try dumping some regions as explained there to see what its got available on internal memory but that's probably not very helpful and i reckon you've only got gmapsupp.img on the card available in region 10 [0x0A] however that would allow you to flash images small enough to fit on your datacard without using MI or a datacard reader.