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But it can be interesting to look for patterns in terms of bottom hardness and fish location.This data on bottom hardness is very useful as part of the overall picture you build up. So, if we see a fish on the screen, we think it must be exactly underneath our sonar. Check the Latest Price on Amazon! All Rights Reserved. However, the SI imaging devices are a better option if you are looking for a device that delivers catchy results.Sonar.reviews is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.comCopyright © 2020. Also set the range to 75-100 feet, to begin with, so that you get good information to study for your initial scans. DI is 455 kHz/60 degrees, and SI is 455 kHz/86 degrees. Once you grab what you see on display, begin to experiment with the settings controls. A fishing record that helps you learn Every scan and map is saved on the Fish Deeper App, and available on any computer using Lakebook™. Long arches mean a fish was in your sonar cone for a long time.And don’t forget, depth matters here – fish at lower depths will create longer arches or lines, because the sonar cone is wider so they remain in it for longer. A fathometer will display water depth and can make an automatic permanent record of measurements. Additionally, the GT20-TM transducer is replaced by the CV20-TM, which appears somewhat bigger. Wide beam scanning is best suited for shallower waters because the cone covers a wider area, the deeper it scans. Sonar is a device for finding objects underwater using sound waves. The fathometer is an echo sounding system for measurement of water depth. And remember, the deeper the depth it marks at, the wider the area it could be in. But if the cone is scanning a drop off, there might be a deeper section underneath which doesn’t get included in the scan – this area is the dead zone (see diagram).One of the easiest mistakes to make when analyzing your sonar readings is to mistake one fish for many fish. It has in its offing three sonar types including DualBeam Plus, Side Imaging, and Down Imaging. Fish finding sonar units send and receive signals many times per second. Then there is the range which sets the distance of each side, the contour mode which removes the water column from the side image display and does well to stitch the left-and-right image together for a more realistic and aerial-style depiction of the bottom. Download end-user manuals, installation drawings and other publications for our sonars, echo sounders, multibeam systems, catch monitoring systems and transducers. Deeper Sonars will show you depth, contour, fish location and much more. This is all because sonars scan in cones.Sonars send out pulse of sound to locate objects. Being that 3D sonar, which is another nomenclature for down imaging and side imaging, shines well when used to fish around covers and structure, side imaging provides the best view possible. If a fish swims right through your sonar cone, it will return impulses from the edge of the cone, the middle and then the other edge. Instead, think that they are somewhere within a cone spreading out under your sonar. Some up-and-down runs on the lake, and you will have an entire area mapped out, letting you know where structure and how the contour way at the bottom is. From there, we will move on to the various sonar technology currently being incorporated by the fish finder manufacturers , including CHIRP (compressed high intensity radar pulse) that promises dramatic gains in sonar target definition and depth penetration.