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Doc. P/N: WSP-009-004
Version: V1.3
Issue Date: August 2013
www.wassp.com
Page 41 of 62
Operator Manual
The Sidescan view is a Sidescan picture generated from the sonar data received by the system.
The display is drawn on the screen as a waterfall – the newest information appears at the top of
the screen, while the oldest falls off the bottom of the screen. This is similar to the way sounder
displays operate, except that in their case the new data appears on the right and the old data
disappears off the left of the screen.
The left side of the Sidescan view shows the signals received from the port side while the right
shows signals received from the starboard side. By default, the Sidescan view starts at the
centre of the vessel and works its way out to port and starboard.
As the Sidescan image moves further out along the seaoor, the picture shows features on the
seaoor. Objects, such as rocks, appear as bright white marks followed by a shadow. Harder
ground gives strong returns (lighter on the grey scale), while a patch of mud or kelp causes a
dark patch/shadow to appear. See “Figure 34. Sidescan View”
The primary advantage of the Sidescan view over the other views is in locating and identifying
objects on the seaoor off to each side of the vessel. Some structures such as a shipwreck may
appear like a large sh school on the other views.
In “Figure 34. Sidescan View”, the Sidescan view allows you to interpret the sonar information
from a different view point, showing a wreck just above the seaoor as a clearly shaped
structure.
Due to the nature of the origin of the data, any signals of signicant strength register as a faint
mirror on the opposite side of the display. Standard Sidescan systems generally rely on a towed
transducer that is held deeper in the water, having the advantage of a lower aspect ratio.
The following methods are used to control the Sidescan view window:
Right-click Options
Independent Zooming
Shifting
5.3 Sidescan View
Figure 34. Sidescan View
Starboard SidePort Side
Area of soft ground
Picture of ship wreck
Reection of ship wreck
Rocky area
Shadow of wreck
Water column
Right click
anywhere in this
window to open
the menu options
41


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