| 摘要 |
The invention provides a system of waterborne units for dredging purposes and comprises a dredger unit consisting of a relatively small self-powered vessel having normal ship form but with the forepart squared-off above the water-line, a stern propulsion and navigating unit the forepart whereof terminates at a flat bulkhead, and at least two hopper bow units the aft ends whereof terminate at flat sterns or bulkheads. The dredger unit and either of the two hopper bow units may be coupled and navigated for dredging operations, and the stern propulsion unit and either of the hopper bow units may be coupled and navigated as a unitary vessel for the rapid disposal of spoil. Box type hopper barges may be provided for interposing between the above referred to navigable arrangements of units.
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