A fish finder can be a very important part of your electronics setup when it comes to fishing. You don’t necessarily need the most expensive one but having one in general helps significantly. It can show you what’s underneath the boat, showing you fish, structure, and tell you the depth of the water. It’s essentially a set of eyes in the water. You can also set waypoints, so if you have success in a spot, you can mark it to return to your exact spot. Lastly, you can create trails with GPS capability, so if it gets dark or foggy, you can turn around and follow your trail exactly back to the landing or dock.
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