Fishfinder 350C Owner’s Manual 7Drift: Sets an alarm to sound when variations in depth at your present locationexceed the specified depth.Sonar SetupWhen you adjust these settings in one sonar view, those adjustments are applied tothe other sonar views automatically.Select MENU > Setup > Sonar Setup.Frequency: Sets the frequency to display on the sonar view, when using a dual-beam transducer.The 200 kHz frequency shows better detail, has a narrower beam, and istypically used in shallower waters.The 77 kHz frequency has a wider beam, so it can be used to cover a largerarea. It can be used as a search tool to locate structures, such as brush piles,and to see more fish.Scroll Speed: Sets the rate at which the sonar display moves from right to left.Using a higher scroll speed shows more detail, especially while moving ortrolling.Fish Symbols: Displays selected information for the suspended targets.Noise Reject: Minimizes the appearance of weak sonar returns by increasing noiserejection.NOTE: Noise rejection settings must be applied to the split-frequency viewseparately from other sonar views.Surface Noise: Sets whether the device displays sonar returns near the surface ofthe water. Hiding surface noise helps reduce clutter.Color Scheme: Sets the color scheme.Color Scheme Color DescriptionWhite Yellow Strong returnPurple Medium returnBlue Weak returnWhite (Black in night mode) No returnBlue Red Strong returnYellow Medium returnLight Blue Weak returnBlue No returnSonar NumbersSelect MENU > Setup > Sonar Numbers.Number Size: Adjusts the size of the numbers shown on the sonar views.Water Temp.: Shows or hides the water temperature on the sonar views, whenavailable.NOTE: The device must be connected to a temperature-capable transducer toshow the water temperature.Battery: Shows or hides the battery voltage on the sonar views.Water Speed: Shows or hides the water speed on the sonar views, when available.NOTE: The device must be connected to a water-speed-capable transducer toshow the water speed.Odometer: Shows or hides the odometer on the sonar views, when available.System SettingsSelect MENU > Setup > System.Language: Sets the language for the text.