Rocksteady....you are the MAN.... Dude, Upman told me the Garmin GPS18 wouldnt work because it was a different format, but seeing it on your post, I plugged it in, told the scanner I was about 5 states away, and selected Location....it found me perfectly, and enabled all the stuff within about 50 miles of me. This is great. It has a regular USB plug on the end of the GPS, which works on my 536. Now I need to find if there is an adapter to make it work with a 436. If I can find one, Im gonna get a 436 for my work truck.