Simrad ES80 Reference Manual page 109

•
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 bottom. Since this echogram is
referenced to the sea surface, the bottom contour will vary with the actual depth.
•
Bottom
A Bottom echogram is mainly used when you wish to examine the echoes from fish
close to the bottom. Since this echogram is referenced to the bottom, the sea surface
will vary with the actual depth, while the bottom is drawn flat.
•
Pelagic
A Pelagic echogram is mainly used when you wish to look at the water column
starting from any distance below the sea surface down towards the bottom, but
without seeing the bottom contour.
•
Trawl
Trawl sensor systems (such as Simrad PI, PX and ITI) communicate headrope depth,
and/or the distance from the headrope to the footrope (trawl opening), to the ES80 at
regular intervals. This information is required for the trawl echogram to be generated.
The Trawl echogram covers the vertical opening of the trawl with reference to the
depth of the headrope.
Procedure
1 Click once in the echogram view that you wish to change.
This will make the view "active". A thick border is placed on the selected view
to visualize this.
2 Open the
Active
3 Select
Echogram
Observe that the
4 On the left side of the
5 Use the
Echogram Type
view.
6 Apply the change(s) you have made.
a Select
Apply
echogram view.
b Select
Apply to All
of the same type.
7 Close the dialog box.
Further requirements
If necessary, adjust the
406273/C
menu.
.
dialog box opens.
Echogram
dialog box, select
Echogram
function to select the type you wish to apply to the chosen
if you wish to apply the chosen setting only to the currently active
if you wish to use the chosen setting on all the echograms
and
Range Start Range
Operating procedures
to open the page.
Echogram
settings accordingly.
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