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Today, bulk carriers make up 21 percent of the world's merchant fleets, [2] and they range in size from single-hold mini-bulk carriers to mammoth ore ships able to carry 400,000 metric tons of deadweight (DWT). A number of specialized designs exist: some can unload their own cargo, some depend on port facilities for unloading, and some even ...
A single lock gate weighs 268,000 pounds. ... They set up bulkheads on each end — giant gray slabs that stopped the river from pouring into the lock chamber — then pumped the existing water ...
Anti-submarine armament was two racks for 300-pound (140 kg) depth charges at the stern and six K-gun 300-pound depth charge throwers amidships. Anti-aircraft armament initially was light, with a quadruple 1.1"/75 caliber gun located in an elevated tub between the number three and four 5-inch gun mounts and six Oerlikon 20 mm cannons (two in ...
The distance refers to the near side of the floating platform. [2] For the large floating platform, 300 pounds (140 kg) of HBX-1 is placed 20 feet (6.1 m) under water and the distances are 110, 80, 65, and 50 feet (34, 24, 20, and 15 m) from the barge with the first shot fore-and-aft and the other three shots athwart ship.
Vessels in the 1,500–2,499 TEU range are the most likely size class to have cranes, with more than 60% of this category being geared ships. [34] Slightly less than a third of the very smallest ships (from 100–499 TEU) are geared, and almost no ships with a capacity of over 4,000 TEU are geared.
Liberty ships were a class of cargo ship built in the United States during World War II under the Emergency Shipbuilding Program. Although British in concept, [3] the design was adopted by the United States for its simple, low-cost construction. Mass-produced on an unprecedented scale, the Liberty ship came to symbolize U.S. wartime industrial ...
A compartment is a portion of the space within a ship defined vertically between decks and horizontally between bulkheads.It is analogous to a room within a building, and may provide watertight subdivision of the ship's hull important in retaining buoyancy if the hull is damaged.
A bulkhead is a retaining wall, such as a bulkhead within a ship or a watershed retaining wall. It may also be used in mines to contain flooding. Coastal bulkheads are most often referred to as seawalls, bulkheading, or riprap revetments. These manmade structures are constructed along shorelines with the purpose of controlling beach erosion.