![]() ![]() This unit is able to offer sonar readings at speeds up to 40 MPH. The unit is also compatible with 360 Imaging transducers, and in case you’ll opt for one, you will benefit from a circular view of everything that’s under the boat, imaging similar to radar. But in order to use the 50 kHz mode, you’ll need a deep water transducer. On the other hand, this HELIX sonar and GPS combo can still use the standard fixed frequencies without CHIRP. This being said, the SI and DI modes are pretty much for fresh water, but it you’re fishing off-shore, the standard sonar with its CHIRP capabilities has you covered. And with the supplied transducer, in 2D sonar, the unit’s depth capability is 1,500 ft. In DI and SI, this HELIX fish finder can scan at depths up to 150 ft. However, since it uses an HD transducer, and the unit offers quite a dense pixel matrix (1280H x 800V), the clarity and detail is simply amazing. However, if you opt for a CHIRP special transducer, this unit will be able to cover frequencies between 28-250 kHz, and become capable of scanning depths of over 3,500 ft.įor Side Imaging and Down Imaging, the unit doesn’t use CHIRP technology. In other words, this unit is able to use a Medium and High range CHIRP, for superior imaging, target separation and definition. When scanning in CHIRP mode, the unit can modulate pulse between 175-225 kHz, and 75-95 kHz. However, it’s important to know that it can only use CHIRP for its 2D sonar. With this transducer, the unit can also use CHIRP. As mentioned above, this unit comes with the XHS 9 HDSI 180 T transducer, with a transom mount, transducer that is also temperature capable. To begin with, let’s have a look at its fish finding functions. So, let’s see what this unit has to offer. It’s one of the best, if not the best Humminbird fish finder and GPS combos for 2016, and so far, in terms of price / quality ratio it stands quite a bit higher than the ONIX 10 SI Combo. ![]() Not only it offers just about everything else the other, smaller units offer, it also has a huge display, comes with a HD transducer, and features CHIRP sonar technology. The HELIX 12 CHIRP SI GPS is the head of the HELIX family from Humminbird. ![]()
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