As far as I know you cant "Copy" the maps so you will need to pay a dealer for the card. OH and you better be sitting down when you get the price for Navionics Platinum plus cards. Over priced and you have to pay for upgrades after a year, which is like still $250+... NOT worth the extra for Platinum plus cards so just get gold as there a bit cheaper !! but not by much.
If I new how much Navionics charge for upgrades I never would have bought the Lowrance HDS unit in the first place...
Cheers
Brett