Simrad ES70 - DOWNLOAD AND INSTALLATION REV B, Руководство оператора

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Display views
Surface echogram
This echogram is related to the sea surface. Start depth (upper echogram boundary) and
vertical range (across echogram) are manually selected by the
Start Depth
and
Range
buttons on the
Main
menu.
Figure 14 Surface echogram A This is the start depth of the
echogram.
In a surface echogram it is
normally set up with
Start Range
= 0 , or to a small value to start
the echogram immediately under
the keel.
B This is the bottom.
The total echogram range (A)
to (F) is defined with the
Range
button on the
Main
menu.
Unless specific conditions apply,
or you wish to control the range
manually, use
Range
= Auto .
C This text identifies the transducer
used to create the echogram.
D This is the scope view.
This view presents individual
colour lines. The colour and
length of each line reflects the
received echo amplitude.
E
By default, the “ping time” and
the depth range is shown in the bottom left side of the echogram. In the bottom right
corner, the “ping time” is the same as current. This information can be changed
using the options on the
Horizontal Axis
tab in the
Echogram
dialog.
F This is the lower end of the depth range. It is normally a few meters below the
bottom contour, depending on the chosen range.
Example 5 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.
The biomass is automatically calculated based on choices you make in the
Calculation
Interval
dialog; within a given time frame, a defined number of pings, or a portion of
the echogram view. The data is then taken from an echo area starting immediately after
the transmit pulse, and ending just over the detected depth. If you have limited your
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