Simrad ES70
How to adjust the fish length for correct calculations
The ES70 measures and records the target strength (TS). The researchers at the
Norwegian Institute for Fishery Research have compiled a set of algorithms based on
extensive testing with the various species, and these are used by the ES70 to calculate the
length of the fish based on its target strength. However, the target strength differs between
the various species. If you find out that the length of the fish you have caught differs
from the initial presentation, you can adjust the algorithms used to calculate the length.
Note
Pay special attention to mackerel, as this fish has a very low target strength. Mackerel
can often be mistaken for small bait. If you fish for mackerel, we recommend that you
use 120 kHz or 200 kHz echo sounder frequencies, as the mackerel shows largest echo
strength for these frequencies.
1
Click the
Setup
icon under the
Main
menu to open the
Setup
menu.
→
on page 106
2
Click
Fish Select
to open the
Fish Select
dialog.
3
Make the necessary adjustments.
4
Click
OK
to save the current settings and close the dialog.
How to monitor the current biomass
The biomass is presented using the
Biomass
information pane, and/or enabling the
Biomass line
in the echogram presentation.
→
on page 59
→
Lines, markers and annotations in the echograms
on page 54
This procedure explains how to open the
Biomass
information pane.
1
Click the
Biomass
icon on the
Title Bar
to open the
Biomass
information pane.
2
To change the size of the information pane, click in the bottom right corner, hold
the mouse button depressed, and drag.
3
To change the transparency of the information pane, open the
Display
menu, and
click the
Transparency
button.
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Summary of Contents for ES70 - DOWNLOAD AND INSTALLATION REV B
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Page 128: ...ISBN 13 978 82 8066 118 0 2010 Kongsberg Maritime AS ...
