Selecting which echogram type to use
The ME70 supports several different echogram types. Each echogram is shown in a separate view in the ME70 presentation. To select which echogram types you wish to see in the ME70 presentations, use the Echogram dialog box.
Context
Use this function to select what kind of echogram you wish to see in the current (active) view.
•  Surface
A Surface echogram is mainly used when you wish to look at the entire water column starting from the sea surface and down to the sea bottom. Since this echogram is referenced to the sea surface, the sea bottom contour will vary with the actual depth.
•  Bottom
A Bottom echogram is mainly used when you want to examine the echoes from fish close to the sea bottom. Since this echogram is referenced to the sea bottom, the sea surface will vary with the actual depth, while the bottom is drawn flat.
Procedure
1 Click once in the view that you wish to change.
The view is activated. It is identified with a thick border.
2 Open the Active menu.
3 Select Echogram.
Image
4 On the left side of the Echogram dialog box, select Echogram to open the page.
5 Under Echogram Type select the type you wish to apply to the chosen view.
6 Apply the change(s) you have made.
a Select Apply if you wish to apply the chosen setting only to the currently active echogram view.
b Select Apply to All if you wish to use the chosen setting on all the echograms of the same type.
7 Close the dialog box.