I had the same question awhile back and after some digging on the internet I found this. There is a typo for H-Can, it should be N41 33.60 W82 58.65. Although I do have th can's on my Navionics maps, I do carry of copy of this in the boat as it has some of the locations for reefs that my maps don't have.

http://www.lakeeriesportfishing.com/...inhotspots.pdf