Kongsberg Simrad SN90, Руководство по установке

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Using Simrad SN90 on purse seiners
For purse seine applications, the SN90 transducer is mounted on the port or starboard
side of the hull, facing the seine.
Since the Simrad SN90 does not use a hull unit, you can have full control of the catch
situation without retracting the transducer. The transducer’s protected position will
prevent damage from the purse wire, and still give you full control while setting and
retrieving the net.
The SN90 allows you to run alongside a school of fish and observe, and you can analyze
the school without passing over it. This is like using a horizontal mounted echo sounder,
but with a lot more accuracy, and with dedicated software and presentation formats. Fish
avoidance is minimized, and more accurate information about the fish in the school can
be obtained. You can detect unwanted species, catch the correct size and estimate the
volume of the school before setting the net.
In purse seine operations, the large frequency bandwidth makes the SN90 ideal for both
mackerel and tuna, and even for herring.
SN90 views
The SN90 presents the echo data using different views. All information from one single
ping is shown in all views simultaneously. Each view can operate with any operational
frequency in the available range, and they can be set up with different operational
parameters.
Which views to see, and how they arranged in the SN90 presentation, is controlled by
the presentation modes chosen by the tabs on the status bar.
A
Inspection Beam :
Note that the left
Inspection Beam
view has a thicker
border than the
other views. This
is because it is
presently the
"active" view.
B Horizontal : The
three lines in the
view identify the
current horizontal
directions of the
three
Inspection
Beam views.
C Vertical : The solid
line identifies the
current tilt, and thus
also the vertical direction of the centre
Inspection Beam view.
Simrad SN90