Do I need GPS on my fish finder?

GPS is extremely valuable for marking productive spots, tracking trolling routes, and navigating back to the ramp in low visibility. Even a basic GPS fish finder like the Garmin Striker 4 stores enough waypoints to build a personal fishing map over time.

What transducer do I need?

Most sub-$300 fish finders include a transom-mount transducer that works on most boats. Kayak anglers may need a scupper-mount or suction-cup portable kit. Always check compatibility before buying a third-party transducer.

Best Fish Finders Under $300 2026