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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
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 freighters 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-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
See also
* Boland and Cornelius Company *Adam E. Cornelius
Adam E. Cornelius (1882–1953) was one of the co-founders of the American Steamship Company and Boland and Cornelius Company.
Biography
At age 20, Cornelius went to work for a small shipbroking and shipping chartering business owned by John J. ...
References
Water transport {{engineering-stub