I've got a Gen 1 HDS 5 Lowrance Unit it work fine but I was trying to put GPS coordinates in @ WP page, once I had WP page pulled up I was in process of changing old WP coordinates to new but when I got to the second set of numbers such as 32.[726] I could not change the first number in the second set any higher than 5, I needed to change it to a 7 but the unit would not go pass 5 I could go from 5 to 0 but not beyond 5. Anyone ever experience this problem though I would reach out on here first then call Lowrance Tech support if needed but I'll need to be at my unit if I call Lowrance. Tks!