Simrad ES70
Echo sounder theory
When you use an echo sounder there are some basic knowledge that you may find it
useful to possess.
Topics
•
on page 108
•
on page 109
•
About dynamic range and display presentation
on page 111
•
on page 112
•
on page 113
•
on page 115
•
on page 117
About biomass
Figure 36
Biomass
information pane
Provided that you use an ES70 with a split beam
transducer, or have a valid biomass license on a single
beam transceiver, you will have access to the
Biomass
information pane.
This biomass value is an indicator to how much fish
you currently have in the current echogram, or in the
zoomed area. Every single fish will emit an echo, and
the sum of all these registered echoes are presented as
a number. Smaller organisms such as plankton will also
emit echoes, but these are so weak that they will hardly
influence on the total biomass.
ES70 records all the targets from the smallest plankton to the largest whale, and provides
these findings as a number. For all practical purposes this number will provide you with
information about the fish abundance to allow you to decide if it pays off to start fishing.
You must also consider if this number is a result of large amounts of plankton or bait, or
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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 ...
