One of my all-time favorite ways to fish is lure fishing from a belly boat on a big, deep lake. The first time I visited one of these, I brought along my Deeper Pro sonar—of course. With depths reaching up to 22 meters, it’s a total game-changer to know where the fish are actually hanging out.
That trip landed me my personal best perch: a stunning 50 cm slab. No way I would’ve found it without the sonar. Cheating? Maybe. But hey, I used to cheat on high school tests too—and I don’t regret either one. Dropping 250 euros on a sonar is a solid investment if it saves you from blindly casting into empty water all day.
What Do I Look For on the Sonar?
Schools of baitfish
If I spot a tight school of small fish, there’s a high chance predators are lurking just below or off to the side.
Groups of perch
Sometimes it’s not a bait ball, but a handful of solid marks—5 or 6 good-sized fish. That’s often a pack of bigger perch cruising together. I’ll drop my lure right in front of them and mimic a panicked baitfish. That exact move landed me my 50 cm PB perch.
Here’s a perfect example of why I love using sonar. You can clearly see a group of fish reacting to my lure—those curved marks show them tracking it in real time. I ended up catching two of them: one was a solid 35 cm perch, and the other was my personal best. You can see the whole moment unfold on my TikTok
Structure and drop-offs
Interesting bottom features usually mean hiding spots—for both prey and predator fish. I save those locations and build a mental map of hot zones to hit next time.
Big fish while vertical fishing
When I’m feeling lazy (or let’s say tactical), I just float and vertically jig a vibrating lure. With the sonar, I can see when a curious pike starts sneaking up on it. As soon as I see that blip closing in, I make the lure dance like it owes me money.
Why It’s Worth It
Deeper sonars take the guesswork out of fishing big lakes. You spend less time searching and more time catching. If you want one of your own, I’ve got a little gift for you:
Use my code NOBLANK10 at deepersonar.com to get 10% off any sonar.
Full disclosure: I earn a small commission when you use the code—so it’s a win-win for both of us.
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