Hi i currently have a Garmin
installed on my boat
and am having trouble finding a bluechart datacard for lake Huron-Georgian Bay. i have looked on ebay and amazon but have had no luck. i went to the marina store and they say that they dont make those chips anymore.... its a huge inconvenience to remove all the wiring
and install a new gps
unit. any help in locating a chip would be greatly appreciated.