Garmin’s fish finders fit in two categories: Striker and Echomap. But each category is further divided between SV and CV. Finding the best Garmin fish finder for your fishing requires you to answer the question: what is the difference between Garmin CV and SV. In short, SV stands for SideVu and CV means ClearVu. The ClearVu transducer produces a high-powered sonar signal across multiple frequencies to create a picture-like image of fish and structure below the boat. SideVu sonar uses a special transducer that transmits signals to the side of the boat to find fish and structure up to 200 feet away. Anglers concerned about the size of the transducer should know the CV transducer puck is smaller than the SV puck. Also, the SV puck is only available as an option on some Garmin models.