What is CHIRP? A conventional sonar transmits a single frequency pulse at a time. A CHIRP (Compressed High Intensity Radiated Pulse) sonar transmits a continuous flow of low to high frequencies, which increases the clarity of the sonar readings as well as the resolution. Why CHIRP? The clarity and extreme accuracy of CHIRP, paired with the Deeper App, gives you the strategic advantage you need to catch more, catch faster and catch better. Extreme Depth Precision - With CHIRP, surface clutter and noise are minimal, so you can expect accurate sonar readings in very shallow water and locate fish as close as 15cm from the surface. On the other hand, you can distinguish bottom feeders in water up to 100m deep. 3 Beam Frequencies for Versatility Discover fish holding areas faster with the wide angle beams or locate your target species through extra thick ice with a 7° narrow angle beam. With a target distance of 1cm, you can easily locate target species even when they are in a school of baitfish. Track even the smallest bait while jigging vertically.