Fishfinder’s employ numerous technologies to pinpoint your next catch.In general, they use dual-beam sonar to provide shallow and deep-water performance.More advanced models such as the Garmin 400C use a dual-beam sonar or dual frequency sonar.This makes the Garmin 400C superior in fresh and deep saltwater fishing.In addition, the Garmin 400C features CANet, which empowers you to link it with other CANet enabled fishfinders. Garmin fishfinders are equipped with UltraScroll™ for lscreen updates at lightening fast speeds. Fishfinder displays vary from grayscale to ultra-sharp color QVGA.
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