Ky Hydrographx maps on GPS.
I finally tried the gps out that I had previously loaded with Ky Hydrgraphx maps. Worked pretty darn good. The map files are large, so at higher area zooms (500 ft and above), there is somewhat of a delay, but I seldom zoom that far out. I have the maps installed on my 276c. Anyone who wants to see it work can chase me down on Ky lake.;) I will be glad to show it to you. I know the lake pretty good, so I don't do too much zooming. I zoom out to about 200 and zoom in to 20. That's a lot of zooming anyway.
There are tricks to doing this stuff. I am on a learning curve........