Garmin’s fish finders ranges from the simplest depth
sounder to high-tech command centers that control your
entire vessel. Every chartplotter and fishfinder that
Garmin sells comes with a depth-finding feature.
Within the Garmin family, the sounder and fish finder
modelss are the GSD Sounder Module, Echo Series and
Fishfinder series. You also have Garmin fishfinders
including built-in GPS plus CHIRP sonar and CHIRP
scanning sonar capability.