Kongsberg Simrad ST90, Reference Manual

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Inspection view
The ST90 system offers an inspection beam. The inspection beam is presented using an
Inspection view. You can train and tilt the beam independent of the beams displayed in the
other views. You can use the Inspection view to study single fish, schools and bottom
conditions in detail.
A
This is the start of the echogram The distance from the
lower part to the upper part of the view corresponds
to the currently selected range.
B Small labels are shown in the bottom left and right
corners of the view. These labels show you the time
in order to identify the scale of the horizontal axis.
C Equidistant horizontal scale lines are drawn in the
view to indicate the range. The
Range
setting defines
how "far" you wish the ST90 system to detect echoes.
D
School of fish
E The view is identified at the top of the presentation.
The line in the identifier reflects the line type used
in the Horizontal view to show the bearing.
How to open
At the bottom of the display presentation, select a suitable
presentation mode, and activate the
Inspection view.
The Inspection view shows you echo data from a separate
beam. The opening angle of the inspection beam depend
on the operating frequency. You can train and tilt the
beam independent of the beams displayed in the other
views. Since the
Inspection view operates with its own
dedicated beam, the operating frequency can be adjusted
independently of the other views. The echo data in the
Inspection view is not subjected to AGC and RCG filtering.
Imagine walking through a dark forest. You have a
powerful torch with a narrow beam. By moving the
light beam you will not be able to get an overview
of the forest, but you can easily study details in the
vegetation.
The echo presentation in the Inspection view
resembles the echogram you see on an echo sounder.
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.
Simrad ST90 Reference Manual