How to rewrite the seabed line (Line pick) see also Echoview help "Line picking algorithms"

Linepick is a useful function of echoview to rewrite the bottom line.



Right click the line figure in the pull down menu.

Choose the "Linepick from current echogram".

And you will have a bottom line.

By changing the linepick setting on the EV files properties (F6) on the "Linepick", you can have your own setting to create bottom lines.

If you make a strict setting here, it is possible to automatically exclude bad regions created by the rough ocean condition.

For example, I changed Minimum Sv for good pick as -20dB, Disrimination level as -50dB.