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What is the oldest navionics map card that you can update, I think mine is from 2009? Also if I have a premium card can I update to a platinum card?
I think my card is a hotmaps preminim card from...

What is the oldest navionics map card that you can update, I think mine is from 2009? Also if I have a premium card can I update to a platinum card?
I think my card is a hotmaps preminim card from...