I have a Lowrance LMS-522c chartplotter with a Nauti Path chart. It works well, but there's no way to update that type of chart. I'd like to find out if there is a type of chart I can purchase, using the SD card, that can be periodically updated. The C-Map/Max/Max Pro line would seem like a good choice, but I haven't found any indication that these charts are compatible with my unit. Does anyone know if they'll work? If not, are their other alternatives.
