Simrad ES80 Reference Manual page 55

• School Response
The School Response information pane shows you the volume backscatter as a
function of the frequency. The information is provided as a plot that shows the how
the echo strength for a group of targets (for example a school of fish) change with
the operational frequency. This functionality allows you to identify the nature of the
schools, and discriminate between them. The information pane can only be opened
when the ES80 operates with FM ("chirp") transmissions.
School Response information pane description, page 242
• Bottom Hardness
The Bottom Hardness information pane shows you the current bottom reflectivity.
This indicates what type of bottom you have under your keel. The value is calculated
using the bottom echo strength in the current ping.
Bottom Hardness information pane description, page 244
• Size Distribution
The Size Distribution information pane shows a histogram of the echoes detected
from single fishes. The histogram presents the actual size of the fish in weight or
length, or with echo strength (shown in dB). The Size Distribution information pane
only works when you have a split-beam transducer.
Size Distribution information pane description, page 246
• Fish Position
The Fish Position information pane shows the position of the detected single fish
echoes. The current ping (largest circles) and the three previous ping (smaller circles)
are shown. The view is "from above". The colours indicate the echo strength. The
Fish Position information pane only works when you use a split-beam transducer.
Fish Position information pane description, page 248
• Echo Position
The Echo Position information pane shows the position of the detected single echoes
within the beam. The current ping (largest circles) and the three previous ping
(smaller circles) are shown. The view is "from the side". The colours indicate the
echo strength. The Echo Position information pane requires the use of a split-beam
transducer.
Echo Position information pane description, page 250
• Zoom
The Zoom information pane allows you to magnify a chosen area of the current
echogram.
Zoom information pane description, page 252
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Getting started
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