Displaying the Bottom Line
You can display lines on an echogram to mark the bottom of the trawl and the beginning of the seabed.
Procedure
Click , then click Draw Bottom
Line.
A yellow line appears at the bottom of the trawl and a white line
appears at the beginning of the seabed. On the example below, the first echogram
does not have a bottom line and the second has one.
Note: In sensors data, the opening is the
distance between the sensor and the yellow line and the height is the
distance between the sensor and the white line.