Method of accurately dredging a desired profile contour
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United States of America Patent
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Feb 15, 1983
Grant Date -
N/A
app pub date -
Apr 28, 1980
filing date -
May 14, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The method of dredging accurately to a desired profile contour with a cutting dredger involves the operation of a cutting assembly, the cutting tools of which describe a predetermined cutting envelope, and swinging the cutting assembly while the dredger is anchored at a known point. The known point is established by means of land-based radio beacons and an aerial aboard the dredger, the dredger being anchored at the known point while the longitudinal axis of the dredger is aligned or substantially aligned with the longitudinal axis of the desired profile contour. As the dredger is swung with the cutting tools engaging the material to be dredged, the location of geometric points of the dredger assembly are repetitively calculated with respect to the coordinate system of the desired profile contour, taking into account various angular relationships between and among such points and by also taking into account motions of the dredger as affected by wave and/or tide actions. The swinging is terminated when the cutting point on the predetermined cutting envelope closely approaches the desired profile contour.
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