Simrad ES80 Reference Manual page 424

Simrad ES80 Reference Manual
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Hardness
This is an "on" switch. The Hardness Line can be added to your echogram
to retrieve additional information. It appears as thick colour coded line that
follows the bottom contour. This line does not remove information, it simply
"pushes" the echo information further down in order to show you the bottom
reflectivity. You can use the Hardness Line and the Bottom Line functions
simultaneously, but each can not be used together with the White Line. To
switch off the line, select
When you study the bottom hardness, you can learn more about the bottom.
Certain species are known to prefer specific bottom conditions. With more
knowledge, you are better qualified to estimate the possible catch.
Note
This is an optional function. In order to use this functionality, a dedicated
software license is required. Contact you local dealer for more information.
Lines
You can enable or disable one or more horizontal lines on the echogram.
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Trawl
This is an "on/off" switch. Select the box to enable the function. 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. The information can be used to draw the upper and/or lower
trawl lines in the ES80 echogram.
Manual trawl setup information can be typed in using the
This is useful for sensor systems that do not measure the trawl opening, or when
the measured headrope-to-footrope distance is unreliable. If you have a relevant
system in use, you can monitor the depth of the applicable sensors. The
page is located in the
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Variable Depth
This is an "on/off" switch. Select the box to enable the function. The Variable
Depth Line can be added to your echogram to measure the depth. A horizontal
line with a depth readout is placed in the echogram. To change the depth, select
the line, keep the mouse button depressed, and move it up and down to place it
at the requested position. This function is typically used to measure the water
depth, the depth of a school, or even single fish.
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Range Other
This is an "on/off" switch. Select the box to enable the function. This function
is used when you set up your ES80 with both a surface related and bottom
related echogram shown simultaneously. When enabled, two horizontal lines in
the surface echogram indicate the range selected in the bottom echogram.
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dialog box.
Installation
parameters.
Trawl
Trawl
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