In Very Shallow Waters When The Auto Gain Mode Is Selected There Are Fluctuations In The Bottom Profile Width And Its Color Representation. What Should I Do; In Very Deep Waters Even Setting The Gain To Its Maximum Value I Cannot See The Bottom What Shall I Do - Standard Horizon CP1000C Owner's Manual

7.15 IN VERY SHALLOW WATERS WHEN THE AUTO GAIN MODE
IS SELECTED THERE ARE FLUCTUATIONS IN THE BOTTOM
PROFILE WIDTH AND ITS COLOR REPRESENTATION. WHAT
SHOULD I DO?
In very shallow waters the environment situation (bottom/water condition) vary very quickly
thus causing the auto gain algorithm to create oscillations while trying to set optimal GAIN
value for each situation. To avoid this it is advisable to switch to MANUAL GAIN mode and
fine tune the GAIN to a fixed setting.
7.16 IN VERY DEEP WATERS EVEN SETTING THE GAIN TO ITS
MAXIMUM VALUE I CANNOT SEE THE BOTTOM WHAT
SHALL I DO?
Try decreasing the NOISE LEVEL. If still the bottom is not visible there is nothing you can
do, the bottom echo is simply too weak to be detected.
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