Echogram Views - Simrad ES80 Reference Manual

Echogram views

The ES80 supports several different echogram types. Each echogram is shown in a
separate view in the ES80 presentation. The tabs at the bottom of the ES80 presentation
allows you to choose which channels to open.
Supported echogram types
•
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.
If you set up the
Start Range
lower end of the echogram, you will have good opportunity to study the echoes from
the water column.
Surface echogram description, page 257
•
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. This makes it easy
to study the echoes from the bottom. You can investigate the bottom conditions and
hardness, and detect fish.
Bottom echogram description, page 260
•
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. Pelagic echograms are useful when you work in
deeper waters. The reduced range and the fact that you do not need to wait for the
bottom echo means that the ES80's ping rate is increased.
Pelagic echogram description, page 263
•
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. In addition to the trawl opening, the echogram covers a certain
range over and under the trawl opening.
Trawl echogram description, page 265
Selecting which echogram type to use
Once one or more echogram views are open, you can
choose which echogram type to see.
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. Open the
406273/C
and depths to place the bottom contour at the
Range
Getting started
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