442704/A
485
Surface reverberation
The surface reverberation depends on the weather condition and the waves.
Bottom reverberation
The bottom reverberation depends on the roughness and physical properties of the
sea bottom.
The
RCG
(Reverberation Controlled Gain) controls the receiver processing. The algorithm
handles each receiver beam individually. The filter reduces the unwanted echoes from the
bottom and from the sea surface. This enhances the visibility of schools.
Note
The algorithms in the filter may interpret scattered fish as reverberation. Use reverberation
controlled gain carefully if you wish to detect scattered fish.
You can choose from nine different filter settings. The numerical settings do not express an
increasing filter strength. They represent specific settings using different algorithms.
The chosen
RCG
(Reverberation Controlled Gain) setting is only be applied to the currently
active view. Activate the relevant view
before
you select the
RCG
setting.
Tip
We recommend that the reverberation controlled gain is active all the time, but be careful in
the vertical presentation.The filter works best on small schools.
The filters in the ST90 system are implemented in “series”.
Summary of Contents for Simrad ST90
Page 1: ...kongsberg com simrad Simrad ST90 REFERENCE MANUAL ...
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Page 337: ...442704 A 335 Related topics Sonar views page 326 User interface ...
Page 413: ...442704 A 411 Related topics Menu system page 375 Display menu page 384 Menu system ...
Page 631: ...442704 A 629 Related topics Concept descriptions page 626 Concept descriptions ...
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Page 688: ... 2021 Kongsberg Maritime ISBN 978 82 8066 211 8 ...
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Page 690: ...Reference Manual Simrad ST90 ...