What is CHIRP?

CHIRP is the most sophisticated sonar technology available for use by the fishing and boating public.
The word itself is an acronym for Compressed High-Intensity Radiated Pulse.

Standard Sonar

Standard sonar sends 1 single frequency at a time. Since the only feedback is from this 1 single frequency, there is little information to work with, limiting the clarity and resolution available with standard sonar.


Instead of sending just 1 single frequency, CHIRP sends a continuous sweep of frequencies ranging from low to high. CHIRP sonar technology then interprets frequencies individually upon their return. Since this continuous sweep of frequencies provides CHIRP with a much wider range of information, CHIRP sonar is able to create a much clearer, higher resolution image.

Advantages of CHIRP

CHIRP has the power and processing sensitivity to deliver much better target resolution, clarity and crispness than any standard sonar system.

Improved target resolution enables you to actually see individual baitfish separately.

Cliff Pemble

A sweep of tones delivers more data, providing a much higher resolution, clearer depiction of targets on screen.

Each frequency reacts differently to structure densities. CHIRP has the sensitivity to differentiate between subtle differences to create a clearer image of what’s below.

Improved target resolution enables you to differentiate between big fish and tight clusters of baitfish.

Cliff Pemble

CHIRP doubles the power put on the target.

Improved target resolution enables you to distinguish fish hovering just above bottom.

And it goes really deep....

CHIRP Scanning Sonar

CHIRP technology also enhances the performance and clarity of Garmin DownVü and SideVü scanning sonar to provide the clearest sonar images on the water.

Garmin CHIRP Capable Products

Garmin CHIRP Sonar capable products are available for inland and coastal fishing, as well as powerful black box units for serious deep sea fishing.

Look Closer