Discover fish and structure, then track their every move with the HELIX 7 DI GPS. See fish and vertical lure presentations by viewing Down Imaging and SwitchFire Sonar side-by-side on the wide, 16:9 display. The reliable, internal GPS offers 2500 waypoints and 50 routes, so you can return to your most productive spots time and time again. A single, microSD card slot delivers Humminbird LakeMaster, AutoChart and AutoChart Pro, as well as Navionics Gold/HotMaps.