Kongsberg Simrad ST90, Reference Manual

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quantified as a number of decibels. It is defined as 10 times the logarithm of the reflected
intensity (I
R
) at one metre from the fish, divided by the intensity which strikes the fish, i.e.
the incident intensity (I
1
), i.e. 10 log I
R
/I
1
.
Tip
Use the
Size Distribution
page to define the properties for the histogram shown in the
Size Distribution information pane. Select
Setup
in the information pane to open the
Size
Distribution
page. The
Size Distribution
page is located in the
Information Pane Options
dialog box.
The target strength from fish varies from one specie to another. The
Fish Select
dialog box
allows you to select the fish species you expect to catch. You can then manually adjust the
size distribution. The
Fish Select
dialog box is located on the
Setup
menu.
Once you are able to assess your catch, you can use the
Fish Size Adjustment
page to
change the average size of the various species. The page is opened in the
Information
Pane Options
dialog box.
The
Information Pane Options
dialog box is located on the
Active
menu. The
Information
Pane Options
dialog box is only available when an Inspection view is active.
The Inspection view can be regarded as an "echo sounder" with an adjustable direction. In
the ST90 system we use the phrase echogram to describe the information provided by
the view.
You can easily change the physical size and shape of each information pane. Click in its
lower right corner, and drag to a new size.
To reset the information pane to its default size, select the
Reset size
button in its top right
corner.
The
Transparency
function allows you to adjust how much you are able to see "through" the
information panes you have opened. You can adjust the setting from 0% (no transparency)
to 90% (almost full transparency) in steps of 10%.
Details
Close
User interface