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Frequently Asked Questions
decreasing the STC value to SHORT in shallow waters or to switch it to VERY SHORT or OFF.
4.8.2Auto range fails, and the digital depth readout displays a very shallow reading. What should I do?
This usually happens if the STC is off or is set to a low value causing disturbs from surface clutter to be stronger than bottom echoes. Try increasing the STC value. As general rule STC has to be set as in shallow waters and LONG in depth waters.
4.8.3
The Fish Finder capability to detect the bottom decreases as the bottom depth increase. If the bottom composition is soft as mud, if the sea conditions are bad, if there are thermoclines or the water is full of materials in suspension it can further decrease thus causing the digital depth readout to fail. When this happens the
4.9At a very shallow range upper half of the screen appears almost completely filled by the surface clutter. How can I eliminate it?
This is normal in shallow waters. To clean up the surface clutter without degrading the digital depth readout algorithm functionality it is possible to set the STC value to custom setting the STC lenght to the same size of the surface clutter, and increasing the STC strenght until the image on the screen cleans up. Please note that in very shallow waters it is usually better to switch to manual gain mode to reduce gain fluctuation due to rapidly changing bottom conditions.
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