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An ore-bulk-oil carrier, also known as combination carrier or OBO, is a ship designed to be capable of carrying wet or dry cargoes. The idea is to reduce the number of empty ( ballast ) voyages, in which large ships only carry a cargo one way and return empty for another.
Companies listed own and/or operate bulk carriers, car carriers, container ships, Roll-on/roll-off (for freight), and tankers. For a list of companies that own and operate passenger ships (cruise ships, cargo-passenger ships, and ferries), see List of passenger ship companies.
This is a list of bulk carriers, both those in service and those which have ceased to operate. Bulk carriers are a type of cargo ship that transports unpackaged bulk cargo . For ships that have sailed under multiple names, their most recent name is used and former names are listed in the Notes section.
A bulk carrier or bulker is a merchant ship specially designed to transport unpackaged bulk cargo—such as grain, coal, ore, steel coils, and cement—in its cargo holds. Since the first specialized bulk carrier was built in 1852, economic forces have led to increased size and sophistication of these ships.
In 2005, oil tankers made up 36.9% of the world's fleet in terms of deadweight tonnage. [61] The world's total oil tankers deadweight tonnage has increased from 326.1 million DWT in 1970 to 960.0 million DWT in 2005. [61] The combined deadweight tonnage of oil tankers and bulk carriers, represents 72.9% of the world's fleet. [62]
Arethusa was built in Britain 1893 as the SS Luciline and was purchased in 1898, serving originally as a water carrier. In 1910 she was converted to carry fuel oil, mostly in support of destroyers: she thus became the US Navy's first oiler. With the new hull designation system of 1920 she was redesignated AO-7. Arethusa (AO-7)
Today, the tramp trade includes all types of vessels, from bulk carriers to tankers. Each can be used for a specific market, or ships can be combined, such as oil or bulk carriers, to accommodate many different markets, depending where the ship is located and the supply and demand of the area.
While Vale Beijing delayed the loading of only 750,000 tons of iron ore, [118] on 11 November 1994 Trade Daring, a 145,000 DWT ore-bulk-oil carrier, broke in two at the same location due to incorrect loading, blocking the deepwater pier of Ponta da Madeira for more than six weeks before the wreck was removed and scuttled offshore. [119]