West to W 85 01
Kevin,I have the Garmin Bluechart of Lake Huron, and it goes as far west as W 85 01, so it won't get you home to Traverse City. As for Lake Superior, it gets you through the locks into Whitefish Bay in great detail, but does actually have all of Lake Superior in small scale (not sure why). So unfortunately if you won't full detail you are faced with getting 3 Bluecharts for all three great lakes you want to sail. But if you mostly want it for cruising the North Channel I can tell you that the Bluechart is quite good for that region.Steve Christensen