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self-propelled and non-self-propelled vessels used for the excavation and removal of bottom materials in waterways, moorages, water areas within and outside of harbors, and during other hydraulic-engineering operations for the purpose of increasing depth or maintaining the required depth. Dredges are often subsumed under the general term “technical fleet.”

Types of dredges include soil dredges, dump scows, unloading scows, rock dredges (rock crushers), and root-stump extractors. Dredges are classified according to the excavation method as bucket dredges (single-bucket and multibucket) and as suction dredges; according to their method of transporting the materials to the stowage area, they are classified as hopper dredges, barge-loading dredges (which unload the materials into dump scows), and pipeline dredges (which remove the soil in the form of pulp through a pipe). The dredges and their auxiliary vessels and equipment (tugboats, sounding boats, and floating shore pipeline) that carry out the dredging operations in a particular area are referred to collectively as a dredging caravan.


Bychkov, N. P. Suda tekhnicheskogo flota. Leningrad-Moscow, 1954.
Krakovskii, I. I. Suda tekhnicheskogo flota. Leningrad, 1968.


References in periodicals archive ?
Great Lakes Dredge & Dock's second contract is valued approximately $17 million.
com), a satellite network operator and provider of fixed, marine, and land-mobile satellite broadband services announced today that they have renewed their Master Services Agreement with Great Lakes Dredge & Dock Company (GLDD), Americas premier dredger.
In addition to using the monofilament hand line method, some people choose to deploy their dredges from a downrigger, an outrigger, or heavy fishing rod depending on their style of boat.
DSC specializes in outfitting dredges to meet the exact specifications of their customers.
The observers are trained and certified independent contractors who go out on the hopper dredges to observe and document any harm to sea turtles, whales, dolphins, or seals.
This will be the first major project for the recently upgraded cutter suction dredge (CSD) Ohio.
Suction dredges are often used to clean fouled shell from leased grounds, to move spatted cultch after shellplanting, or to remove predators (Ismail 1985).
But then he was told the planes needed to be capable of hauling large mining dredges weighing more than 3,000 pounds, he said.
Great Lakes Dredge & Dock has extensive dredging experience and a track record for successful completion of huge projects.
Available in either diesel or electric power, the DSC Shark Class cutter suction dredge features a conventional dredge-operating configuration with a modular design for ease of transportation.
Army Corps of Engineers as well as representatives from the state of Louisiana regarding dredge capabilities and possible scenarios to protect the ecologically sensitive barrier islands off the coast of Louisiana and Mississippi from intrusion of oil as it moves toward the beaches.
Quantification of dredge data is more difficult than patent tong data in that dredges accumulate organisms as they move over the bottom, may not sample with constancy throughout a single dredge haul, and may fill before completion of the haul, thereby providing biased sampling in favor of the "early" portion of the haul.