While the container ship is perhaps the public face of maritime trade today, they make up only about 13% of the world's shipping fleet.1 For all of the TVs, car parts and clothes that cross the oceans in containers, oceanic transport is dominated by bulk cargoes like coal, iron ore, oil and grain. These cargoes are measured by weight and handled entirely differently from containerized cargoes. While liquid cargoes definitely deserve their own discussion, today we'll focus on the solid bulk carrier, which makes up 43% of the world's shipping fleet.

Bulk carrier GH Fortune heads to sea
Until the end of the 19th century, oceanic bulk cargo was largely carried by sailing ships, which were cheaper than steamships until the development of the triple expansion engine. Coastal trades made more use of steam, with early examples like the John Bowes entering service from the middle of the century, particularly in the coal trade. But even then, bulk cargoes were often bagged and loaded and unloaded by hand, much as contemporary break-bulk cargo was. These were some of the staples of the tramp trade, which saw vessels chartered for specific loads of cargo, usually only one way, and their owners had to string together a series of contracts to make a profit. While ore and coal were quickly moved to specialized bulk carriers, other bulk cargoes remained aboard tramps well into the second half of the 20th century. Grain, the flow of which greatly depended on harvests worldwide, was a common tramp cargo, as were smaller-volume goods like sugar, forest products, and scrap metal. Read more...
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