What Are Si Di and Chirp in Fish Finders?
There are two basic types of transducers on fish finders: chirp and si di. If you are new to fish finding equipment, these two terms may seem confusing. Fortunately, there are a number of differences between these two types of sound. Let’s take a look at the differences between si di and chirp sonars and how they can affect your fishing experience. how do fish finders work
CHIRP and SI sonar use high-frequency sound waves that can be a great help when fishing in shallow waters. Normal 2D sonar functions at dual frequencies of 83/200 kHz, but CHIRP technology increases the range to a range of 70-95 hHz and 175-255 kHz. CHIRP sonar also adds target separation and precision to your scans, making them more accurate.
The HELIX 5 CHIRP SI GPS G3 is another CHIRP fish finder, but it comes with a different transducer. Both models are equipped with Down Imaging sonar and AutoChart Live, but only the HELIX 5 CHIRP GPS G3 comes with MEGA DI mode and advanced networking features. However, both of these models are equipped with a Micro SD card slot for storing waypoints and tracks.
Some fish finders come with networking capability. For example, the Humminbird Helix 7 SI and DI feature a large, bright screen and sonar imaging. The HELIX 7 SI is a great model, but it lacks the networking features of other models. If you’re looking for a budget fish finder, the HELIX 7 SI G3N is an excellent option.
Dual Spectrum CHIRP sonar gives a clearer view of the bottom and holding structure. A Low-Q CHIRP transducer powers this powerful feature. Its two modes of search give you complete control over the depth and target separation. You can even switch to a narrow or wide mode so you can view more underwater terrain. Dual Spectrum CHIRP sonar also provides a detailed map of underwater terrain, giving you a clear picture of the area.
HELIX units are GPS/fish finder hybrids. The HELIX 7 is a star in both arenas. Its advanced transducer and mapping tools make it a GPS/fish finder with many functions. You can even set waypoints and tracks, as well as routes. This means you won’t need to buy a map every time you go fishing. There are a number of other benefits with the HELIX 7 and other products from the HELIX line.