Bottom Echogram Description - Simrad ES80 Reference Manual

Simrad ES80 Reference Manual

Bottom echogram description

The Bottom echogram shows the echoes over and below the bottom contour. Since this
echogram is referenced to the bottom, the sea surface will vary with the actual depth,
while the bottom is drawn flat. You can select the start range (the depth from which the
echogram starts) and the vertical range (the vertical "length" of the echogram) by means
of the and settings. Both the and the functions
Start Range Range Range Start Range
are located on the menu.
Main
How to open
To activate Bottom echogram, click in the chosen view
to make it "active". Select on the
Echogram Active
menu. Select the tab to open the page. On the page, set
Echogram Echogram Echogram
to Bottom.
type
Description
A Bottom echogram is mainly used when you wish to examine the echoes from fish
close to the bottom. Set up the and depths to hide the surface and
Start Range Range
place the bottom contour at the middle of the echogram. You can investigate the bottom
conditions and hardness, and detect fish.
Note
The echogram is only drawn for pings that have a successful bottom detection.
Since the Bottom echogram is referenced to the bottom, the value must be
Start Range
negative. If you wish to start your echogram from 10 meters above the bottom, you
must set the to –10 m. The setting defines the vertical range from
Start Range Range
the start depth and down.
Tip
For closer investigation, you can use the Zoom information pane to enlarge
the echoes from the bottom.
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