What card type to use in my Furuno GD 1700/C
I picked up a used furuno chartplotter. The card door says C-map NT. but the model number on the back does not include the NT after the model #. The guy I purchased it from said it had a Navionics card in it when he removed it from a boat while he was installing an system upgrade. I contacted Furuno and provided them the same pic as below. They sais C-map. I would like to believe they know what they are talking about but the fact there was a Navioinics card in it still leaves me unconvinced. Is there any other way to physicaly tell i.e. card slot size. thanks for any help.
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