Lowrance Hook2 4x

The Lowrance Hook2 4x is a basic, no-frills fish finder designed for simplicity. It features an autotuning sonar that automatically adjusts settings for the best performance, making it incredibly easy to use for beginners. It doesn't have GPS or mapping, but it does a great job of showing you where the fish are. It is a compact, affordable unit that is perfect for small boats, canoes, or as a secondary unit on a larger boat.

If you just want to see depth and fish without any complex features, this is a solid, reliable choice.