Kongsberg Simrad ST90, Reference Manual

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Related topics
Operating procedures, page 79
Improving the recognition of fish and schools using receiver filters, page 117
Ping-Ping Filter function, page 469
Reducing the strong bottom echo to see fish close to the
seabed
Fish close to the bottom can be hard to see because they may be hidden in the strong bottom
echo.
Context
The ST90 system provides a bottom filter to reduce the sometimes powerful echo from the
seabed. This filter is useful if you try to find fish close to the bottom.
Procedure
1 Click in any view to make it active.
The active view is identified with a thicker border.
2 Open the
Active
menu.
3 Select
Bottom Filter Threshold
.
4 Select a value from the options provided.
Select a
Bottom Filter Threshold
value to control
the "strength" of the filter. A higher numerical
value increases the filter efficiency and reduces the bottom echo accordingly.
The choice you make is by default only applied to the currently selected (active) view.
Select the middle of the button to open a small menu with the available options. Select
the
left side of the button to select a "lower"' menu choice. Select the right side of the
button to select a "higher"' menu choice.
Related topics
Operating procedures, page 79
Improving the recognition of fish and schools using receiver filters, page 117
Bottom Filter Threshold function, page 487
Simrad ST90 Reference Manual