Shop dedicated fishfinders at West Marine.
Dedicated fishfinders are a great choice for anglers who do not need the capabilities of a chartplotter/fishfinder combo or a multi-function display. West Marine offers dedicated fishfinders manufactured by Garmin and Lowrance.
Following are criteria to consider when shopping for a dedicated fishfinder that is right for you.
Sonar Frequencies
Fishfinders use sonar to detect fish and underwater structures and the frequency of the sonar is an important factor to consider. Higher frequencies, such as 200kHz or 455kHz, are better for shallower waters. Lower frequencies like 50kHz are better for deeper waters.
CHIRP Technology
Most of the dedicated fishfinders that West Marine offers include CHIRP technology which uses a range of frequencies to create a more detailed and accurate picture of what is happening below the surface. Unlike traditional sonar, which uses just one, two or sometimes three frequencies, CHIRP sends out a range of frequencies, allowing for better target separation and increased detail.
Fishfinder Power
As fishfinders increase in power, so does their ability to “see” fish and structure at greater depths. Power is rated in watts. When checking the specifications for a fishfinder, look for its power rating in watts RMS, which is a more realistic rating compared to peak watts.
Fishfinder Displays
Screen size and screen resolution are also important factors to consider. The bigger the screen and the greater the resolution, the better you will be able to differentiate between various objects in the water column.
Conclusion
Overall, we suggest that you choose a fishfinder that is appropriate for your fishing needs, with the right frequency, display, power, and additional features to provide the information you need to find and catch fish. Visit West Marine's Fishfinder Guide for more information on what to look for when purchasing a fishfinder. Also, check out some of our favorite fishfinder models for any budget by reading Six of our Best Fishfinders-Chartplotter Combos.
Dedicated Fishfinder FAQ
Each brand offers different strengths:
- Garmin: Easy-to-use interface and detailed GPS mapping.
- Lowrance: Strong sonar performance and imaging features.
- Norcross: Compact and portable options for small boats and casual anglers.
Basic depth finders only show water depth. Fish finders provide more detail, including fish arches, bottom features, and water temperature. Some depth finders combine both functions.
Yes, but performance varies by model:
- High-frequency sonar is ideal for shallow and clear water.
- Low-frequency or CHIRP sonar penetrates deeper water.
- Some models switch between frequencies automatically.
Most fishfinders are designed for DIY installation. Transom-mount transducers are common on small boats and only need basic tools to install.
GPS helps mark fishing spots, track routes, and improve safety. Many modern fish finders include GPS and chartplotting as standard features.