Humminbird is one of the most popular brands for fish finders and GPS. They merges new technology with the sonar functions you have come to know and love with their first multi-touch Multi-Function Displays for fresh- and saltwater boaters that works like your smartphone touch screen. The ONIX and ION Multi-Function Displays bring Down Imaging, Side Imaging, and 360º Imaging to the table, along with the ability to display radar, autopilot, digital video-camera imaging, CHIRP sonar, and AIS. Both systems include Humminbird base-map chartography, and can be enhanced with both Navionics and C-Map as well as LakeMaster for freshwater units.