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This filter is most useful for midwater trawling where there is usually no strong bottom
appearing.
Related topics
TVG Correction filter
Clicking this button will enable or disable the TVG Correction filter. This filter reduces
TVG-amplified noise at further ranges where no targets appear.
You can adjust the filter percentage (applied to the range) in the
Display Widget
.
This filter will remove the range-dependent TVG effect on incoming echo data
starting from the range percentage that you define up to the maximum range.
For example, if your current rage is 0.5 m to 10 m, then a TVG Correction of 80 percent
will apply the filter to the sonar view beyond the 8 m range rings. The TVG value that
was increasing with range will be replaced with a constant value (equal to the TVG value
at the given range).
The TVG Correction range will appear as an overlay in the sonar view (using your preferred
units of distance).
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Содержание Simrad FM90i
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