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Bass Crash Course: Intro to Side-Imaging Sonar

This highly efficient fish-finding tool helps anglers locate fish and fish-holding cover below and to either side of the boat.

When side-imaging sonar was first introduced almost 20 years ago, it was revolutionary in that anglers were no longer limited to searching with sonar directly below the boat. The ability to look out as far as 200 feet to either side of the boat has dramatically shortened the amount of time spent looking for fish-holding cover, contour changes, baitfish and game fish away from the shoreline.

Side-imaging sonar offers picture-like images of the water column and lake bottom by emitting a very thin, high-frequency signal from each side of the transducer that covers the areas perpendicular to the boat as well as the water column directly under the transducer. The data is displayed...

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