Size Distribution Information Pane Description - Simrad ES80 Reference Manual

Simrad ES80 Reference Manual

Size Distribution information pane description

The Size Distribution information pane shows a histogram of the echoes detected from
single fishes. The calculations are based on the fact that different fish species have
different echo strength. The echo strength also depends on the operational frequency you
use. The histogram presents the actual size of the fish in weight or length, or with echo
strength (shown in dB).
Prerequisites
The Size Distribution information pane only works when you have a split-beam
transducer.
How to open
To open the Size Distribution information pane, click in the chosen view to
activate it, then select the button on the top bar. To close the
Size Distribution
information pane, select the button on the top bar one more time. You can also
select in the top right corner of the pane.
Close
Description
The Size Distribution information pane shows
a histogram of the single fish echoes that are
detected. The calculations are based on the
parameters you have selected in the
Calculation
dialog box. It thus provides a visual
Interval
indication on how large the individual fishes are
within the chosen interval.
Only the fishes detected by the current channel
are shown. In this context, the phrase channel
is used as a common term to identify the
combination of transceiver, transducer and
operating frequency.
The number shows the average size of all the
fishes in the histogram. The value is presented in
the unit you have chosen on the page. For an accurate X-axis value,
Size Distribution
place the cursor on the axis, and read the value from the tooltip label.
The abbreviation "TS" is commonly used for "target strength". This is a measure of how
strong echo the individual fishes in the current echogram generate.
Tip
The target strength from a fish varies from specie to specie. The dialog box
Fish Select
allows you to select the fish species you expect to catch, and manually adjust the size
distribution. The dialog box is located on the menu.
Fish Select Setup
By selecting in the information pane, the page opens. The
Setup Size Distribution Size
page allow you to define the properties for the histogram shown in the Size
Distribution
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