The instructions that came with the IF-NMEA2K2 firmware upgrade package say the update can be done by copying the files to an SD card and importing them by selecting the "Import Update File" option under Menu\Files\General. That is much easier than hooking the RS232 wires to a PC, but those instructions are for NavNet3D. My TZT14 has a similar Menu\Files\General path, but I couldn't find an "Import Update File" option. Is there some other way to do it with a TZT14?
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