CHIRP technology has been in use for military and scientific applications in both radar and sonar for many years. It is now available for recreational use in a new generation of transducers, fishfinders and sounders.
How CHIRP works and how it differs from conventional sonar
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Transducers and sounders are designed as either single-band or dual-band
Transducer construction and size
Many Airmar CHIRP transducers have adopted a Mix and Match system
Matching a transducer with a sounder/fishfinder
Garmin SideVü/DownVü and Raymarine SideView/DownView