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No problem. The easiest way to picture it is if your graph was a piece of paper. Fold it in half in the center where your boat is. Then fold it out 90 where the bottom (where black and yellow meet)...

I'd guess your main motor as well if your getting this all the time. Try lifting your motor up while using your trolling motor and see if the line goes away.

One of the hardest things for most people to really comprehend when first using side imaging is the distance the image is from the boat. If your in 20' of water and you see a school of crappie on...

Hope the country gets back to "normal" and I can spend a lot more time on the water chasing crappie.

Spend more time fishing and enjoying life.