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This is the basic display
showing a vessel approaching a bridge support in Narragansett Bay, Rhode
Island. The three dimensional view shows the vessel passing over an
irregular bottom topography that is color-coded according to depth, based
on the scale to the right. The side profile on the bottom of the image is
taken along the vertical slice that extends out from the bow. Note
the bridge support to port of the vessel heading.
To increase the size of the
image, click on it. |
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In this second image the
side profile has been skewed to about 30 degrees to port so that it passes
through the bridge support. Note how the profile shows the support
extending up from the bottom to the surface.
To increase the size of the
image, click on it. |
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In the third image, the
alarm feature has been activated. The red translucent triangle shows the
zone where the alarm is active. The dimensions of the alarm area are
configurable by the user. In this case the alarm is not sounded
because the bridge support is outside of the area of the triangle.
To increase the size of the
image, click on it. |
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In the fourth view, the
minimum depth function has been turned on. This gives the minimum
depth within a configurable area. Note that there is a small rise in the
bottom topography under the vertical slice. It is picked up by the side profile, and recorded in
the minimum depth, however since it is at a greater depth than the setting
for the alarm, an alarm is not sounded.
To increase the size of the
image, click on it.
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In the
fifth view the sidebar has been activated. This allows the operator
to incorporate other inputs into the view, such as electronic charting,
video, GPS, or even a browser window.
To increase the size of the image, click on it. |
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In the
sixth view, the colors of the 3-dimensional view and profile view are
related to signal strength rather than depth. This is useful for
locating objects that have higher acoustic reflectivity. For example
a rock or hard sand bottom will have greater reflectivity than a soft mud
bottom.
To increase the size of the image, click on it.
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The
image display can also be manipulated during operation. The next three
images are the same point in time except that the image is rotated by the
operator to give the preferred view.
The first image is from the
port quarter and above.
To increase the size of the image, click on it.
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The second is from dead astern level with the vessel. Note how the
alarm area is three dimensional and defines the "safety zone" as set by
the operator.
To increase the size of the image, click on it.
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The third image is from above the vessel. This view
parallels the traditional view of a radar screen that many
operators are familiar with.
To increase the size of the image, click on it. |
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