The powerful Humminbird® APEX 13 MEGA SI+ Chartplotter provides the clearest sonar imaging on the sharpest multi-function display that anglers have seen yet. Industry-leading MEGA Imaging+ and Dual Spectrum CHIRP sonar come standard See it all clearly on the 13.3" full-HD touchscreen display with Cross Touch® interface that lets you customize your viewing options to get the info you need.