USEPA GL collection 151 DuluthHalletDockSelfunloader

SS Carl D. Bradley unloading hopper in 1958 A self-discharger (or self-unloader) is a ship that is able to discharge its cargo using its own gear. The most common discharge method for

bulk cargo Bulk cargo is commodity cargo that is transported unpackaged in large quantities. Description Bulk cargo refers to material in either liquid or granular, particulate form, as a mass of relatively small solids, such as petroleum/ crude oi ...

is to use an excavator that is fitted on a traverse running over the vessel's entire hatch, and that is able to move sideways as well.

Lake freighter Lake freighters, or lakers, are bulk carrier vessels that operate on the Great Lakes of North America. These vessels are traditionally called boats, although classified as ships. Since the late 19th century, lakers have carried bulk cargoes of m ...

s on the

Great Lakes The Great Lakes, also called the Great Lakes of North America, are a series of large interconnected freshwater lakes in the mid-east region of North America that connect to the Atlantic Ocean via the Saint Lawrence River. There are five lakes ...

use

conveyor A conveyor system is a common piece of mechanical handling equipment that moves materials from one location to another. Conveyors are especially useful in applications involving the transport of heavy or bulky materials. Conveyor systems allow ...

-based unloading gear to empty funnel-shaped holds from the bottom, lifting the bulk cargo onto a boom. The Liberty Ships of World War II, By Greg H. Williams, page 255

References

Water transport {{engineering-stub

See also

References