I recently bought a 1993 320. It came with a Garmin 182c chart plotter. It uses a technology that is no longer supported by Garmin, BlueChart chip/card. The boat was originally a Canadian charter so it only has the Blue chip for West Coast Canadian Waters. As I live near Seattle I was wondering if there was any way to get my hands on the BlueChart chip for the US northwest waters. I would be glad to buy it. I had heard of blank chips that could be used to download the charts but have not found any concrete information. Any suggestions?