cart7t
MapCreate is a computer program that lets you work with waypoints at home then load them to a SD card to load them into you GPS. It does away with a lot of hunting on the water.
I don't like Mapcreate I rather use Hot Maps Explorer with PC Hummingbird in my Birds.
I use the Navionics HD maps for Ky and Barkley. They are more accurate in my openion.