Engineering

Submersion and trimming mechanism of Submarine

Submersion and trimming mechanism of Submarine Technology

All surface ships, as well as surfaced submarines, are in a positively buoyant condition, weighing less than the volume of water they would displace if fully submerged. To submerge hydrostatically, a ship must have negative buoyancy, either by increasing its own weight or decreasing its displacement of water. To control their weight, submarines have ballast …

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Usage of Submarine

Introduction of Submarine and Usage of Submarine.

A submarine is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term most commonly refers to a large, crewed, autonomous vessel. It is also sometimes used historically or colloquially to refer to remotely operated vehicles and robots, as well as medium-sized or smaller vessels, …

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CUTTER SUCTION DREDGER

WHEN ARE CSDS USED?

CSDs can be used for land reclamation, for deepening harbors and for the construction and expansion of ports and navigational channels or for pipeline trenching in the seabed. When the dredged material is being used for land reclamation, the distance between the dredging and disposal areas is usually shorter than the distances covered by trailing …

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CUTTER SUCTION DREDGER

WHAT IS A CUTTER SUCTION DREDGER? CHARACTERISES OF A CSD?

Although systems for describing dredgers vary, in general three broad classifications are recognized based on the means of excavation and operation. These are known as mechanical dredgers, hydraulic dredgers and hydrodynamic dredgers. Hydraulic dredgers include all dredging equipment which makes use of centrifugal pumps for at least part of the transport process of moving the …

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