JOI 2026 EN

SONAR TECHNOLOGY EXPLAINED! SWITCHFIRE BASICS: Echo sounders emit sound waves at a certain frequency and detect the reflected signal (echo). FREQUENCIES: THE higher the kHz frequency, the more details become visible. Low frequencies are perfect for illuminating deep waters. DUAL SPECTRUM CHIRP CHIRP SONAR CHIRP stands for "Compressed High Intensity Radar Pulse." How can you imagine this function? CHIRP scans the water for fish, similar to how a car radio automatically searches for stations. Conventional transducers send individual sonar pulses to create a sonar image, while CHIRP continuously sends different sonar frequencies from low to high. Humminbird CHIRP offers broadband capability of up to 28kHz – 540kHz. It unlocks your transducer and utilizes its full CHIRP capacity, using its maximum frequency range when scanning. We put the full spectrum at your feet. With this wide coverage, CHIRP produces a more accurate and detailed view of fish, structure, and bottom. Traditional sonar transducers keep you waiting in line, wasting valuable time with each sonar pulse. Humminbird CHIRP transducers send more pulses in a given period, reducing processing time because more pulses mean more information and greater echo separation. With SwitchFire, you can customize your screen to suit your fis- hing conditions with two unique display modes: Clear Mode and Max- Mode. Decide how much details, such as fish, structure, thermoclines, or water currents, you want to see. Don't be fooled by the beautiful images, because the real hero is our Low Q CHIRP transducer with short pulse intervals! It uses more coverage to track fish and scan the bottom and its struc- tures. This workhorse is responsible for the sharp fish arcs and clear object separation, even just above the bottom, so that the fish is clearly visible and separated from its surroundings. Dual Spectrum Chirp is the best in its class and is standard on most current HUMMINBIRD fishfinders. Refine your view with the narrow transmission cone, which makes a big difference, especially when it comes to detecting small fish and fish that are close to the bottom or near structures, allowing you to distinguish them separately. Larger predatory fish are usually identifiable as long, sharply defined fish crescents, allowing you to react immediately with your bait presentation. 42° 140–200 kHz 25° 180–240 kHz WIDE TRANSMISSION CONE – M aximum coverage NARROW BEAM – M aximum detail Use this mode to search large areas or to observe your bait action during vertical jigging. Use it to find deeper areas, structures, vegetation, and fish. 35 SONAR TECHNOLOGY