Expanding on an impressive list of sonar capabilities, Humminbird recently announced the new 800 series fish finders, which now have a new twist: Down Imaging sonar to complement the Side Imaging technology featured in the 7-inch 898c SI Combo ($1,499.99). Down Imaging adds photolike imagery of the bottom directly beneath the boat, providing a detailed look at structure and the water column. Combined, Down Imaging and Side Imaging give a detailed 180-degree view beneath the boat. Both the aforementioned unit and the 858c Combo ($999.99) incorporate dual-mode SwitchFire sonar: Max Mode reveals details, including plankton, thermoclines and current, and it even tracks lures. On Clear Mode, the return is filtered to display fish and structure only, for a clean image, especially useful for reducing clutter caused by turbulence. Both models are preloaded with ContourXD by Navionics and upgradable to Navionics Platinum+, Gold, HotMaps and HotMaps Premium packages.