is moving away from SeaTalk
. Their new e- and c-series don't support it directly, so to interface your ST-60 instruments you'd need their SeaTalk/SeaTalkNG converter.
Unfortunately, none of their newer chartplotters support chart sharing with the Classic C- or E-series, nor the C-Wide series. They only support chart-sharing with the E-Wide series, and that's in a special "compatibility" mode. See this thread
over at their support forum.
You don't mention if you have radar
. If you do, and it's an older analog model, you'll have to replace it with a new digital model if you want radar
imagery at the helm.
We just went through all this when our old E-120 Classic died and we replaced it with a new e125. Had to replace a perfectly functioning RD242 radar with a newer digital model, as well as install a new SeaTalkNG network, designing around the 5-device limitation of the SeaTalk/SeaTalkNG converter.
Unfortunately, there's no way to share cartography over the network - no matter what brand of chartplotter
you get. And since Navionics
has moved to microSD chips, you'll have compatibility problems there.
Of course, you could always sell the C120W on e-Bay and buy something new...