No matter the depth, no matter the location, the HELIX® 12 CHIRP Sonar GPS combines the clarity of Full-Spectrum CHIRP with Precision Internal GPS to bring incredible accuracy to fish-finding and navigation. The broad, 28kHz to 540kHz (Requires optional CHIRP transducer(s) to obtain full frequency range.) range showcases fish in crisp detail, while the Internal Precision GPS lets you locate and store up 2500 waypoints and 47 routes. Discover new territory to fish with the pre-loaded AutoChart® Live software, allowing you to make your own, detailed digital maps-live on your screen. Ethernet networking capable Compatible with Humminbird® Radar, Auto Pilot, 360 Imaging® / i-Pilot® LinkTM by Minn Kota®.