Simrad ES70 - DOWNLOAD AND INSTALLATION REV B, Operator'S Manual

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Simrad ES70
Upper echogram: Pelagic or surface related
When you need to establish a vertical depth range, why not let the echo sounder choose it
for you. On the main menu, set
Range
to Auto .
You can also define your own depth range. To establish a depth range from the surface
and down to the bottom, set
Range
to a suitable depth, and
Start Range
to 0 (zero) meters.
A phased area may also be established. This is used when you wish to concentrate on
a certain and limited depth range If you for example finds a school of fish 150 meters
below the surface, you can set up the echo sounder to show this school without also
provided information from the water column over and under it. To set this up, set
Start
Range
to a few meters above the school, and
Range
to a few meters below it.
If you are bothered by interference from a sonar using the same operational frequency,
try to set
Start Range
to 10 to 20 meters. You will then avoid the noise when both
systems transmit simultaneously.
Example 16 Start Range in a surface related echogram
In a surface echogram, set the
Start Range
value to 0 meters. This will
make the echogram start from the sea surface (provided that the transducer
offset has been defined). Set
Range
to the current depth plus 20 meters. The
echogram will now show the area from the sea surface and down to 20
meters “below” the bottom. The bottom contour is easily detected when
the depth changes.
Example 17 Start Range in a surface echogram
In a surface echogram, set the
Start Range
value to 10 meters. This will make
the echogram start from 10 meters below the sea surface (provided that the
transducer offset has been defined). Set
Range
to the current depth plus 20
meters. The echogram will now show the area from 10 meters below the sea
surface, and down to 10 meters “below” the bottom. The bottom contour is
easily detected when the depth changes.
Example 18 Start Range in a pelagic echogram
In a pelagic echogram, set the
Start Range
value to 20 meters. This will make
the echogram start from 20 meters below the sea surface (provided that the
transducer offset has been defined). Set
Range
to 40 meters. The echogram
will now show the area from 20 meters below the sea surface, and down to
60 meters below the transducer. Provided that the depth is larger than 60
meters, the bottom contour is not shown.
Lower echogram: Bottom related (bottom expansion)
The majority of our users prefer to use the lower echogram (B) for bottom expansion.
This is the default setting.
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343539/B