What is CHIRP Sonar and Why It Matters

If you’ve been shopping for a new fish finder or multi-function display, chances are you’ve come across the term CHIRP sonar. It’s one of the biggest advances in marine electronics in the last decade—but what exactly is it, and why should you care?

Let’s break it down.

What is CHIRP Sonar?

CHIRP stands for Compressed High-Intensity Radiated Pulse. Traditional sonar sends a single-frequency pulse into the water. CHIRP sonar, on the other hand, sends a range of frequencies—from low to high—in a continuous sweep.

This might sound like a small change, but the result is a massive leap in detail and target separation.

Why CHIRP is Better Than Traditional Sonar

Here’s what makes CHIRP such a game-changer:

1. Better Target Separation

With traditional sonar, fish that are close together (or close to the bottom) often show up as a single blob. CHIRP can separate targets more clearly, so you can distinguish between bait and predators or see fish tight to structure.

2. More Depth + Detail

Because CHIRP sweeps across multiple frequencies, it returns more data and gives you a cleaner image—even at greater depths. You’ll see bottom contours more clearly and pick up fish that older sonar might miss.

3. Less Clutter

CHIRP reduces noise and clutter in your display. That means you get a clearer view of what's really beneath you, especially in choppy water or high-interference environments.

Who Needs CHIRP Sonar?

Anglers—both inshore and offshore—benefit the most. Whether you’re jigging in 30 feet or trolling in 300, CHIRP gives you a sharper picture of the water column. You can track bait balls, isolate game fish, and even see your lure in real time.

Cruisers and sailors can also benefit from CHIRP for bottom tracking, anchoring, and avoiding underwater hazards.

CHIRP Sonar in Today’s Marine Electronics

Most major marine electronics brands now offer CHIRP across a wide range of products:

Garmin – Found in their GPSMAP and ECHOMAP series

Simrad – Included in the GO and NSS evo3/evo3S models

Raymarine – Built into select Axiom and Element series

Lowrance – Available in HDS Live and Elite FS units

Many of these systems combine CHIRP with SideScan or DownScan for even more precise imaging.

If you’re upgrading your electronics or outfitting a new boat, make sure CHIRP is on your must-have list.

Want help choosing the right CHIRP unit for your boat? Reach out to us at Marine Electronic Pros—we’re here to guide you through every step.