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Handysize

Handysize most usually refers to a dry bulk vessel with deadweight of 10,000-40,000 tonnes. Handysize ships are very flexible because their size allows them to enter smaller ports, and in most cases they are 'geared' - i.e. fitted with cranes - which means that they can load and discharge cargoes at ports which lack cranes or other cargo handling systems. Handysize is numerically the most common size of bulk carrier, with nearly 2000 units in service totalling about 43 million tons. Handysize bulkers are built mainly by shipyards in Japan, Korea, China, Vietnam, the Philippines and India, though a few other countries also have the capacity to build such vessels. The most common industry-standard specification handysize bulker is now about 32,000 metric tons of deadweight on a summer draft of about 10 metres (33 ft), and features 5 cargo holds with hydraulically operated hatch covers, with four 30 metric ton cranes for cargo handling. Some handysizes are also fitted with stanchions to enable logs to be loaded in stacks on deck.

Panamax

Panamax are terms for the size limits for ships traveling through the Panama Canal. Formally, these limits and requirements are published by the Panama Canal Authority(ACP), titled "Vessel Requirements". The allowable size is limited by the width and length of the available lock chambers, by the depth of water in the canal, and by the height of the Bridge of the Americas since that bridge's construction. These dimensions give clear parameters for ships destined to traverse the Panama Canal and have influenced the design of cargo ships, naval vessels, and passenger ships. The increasing prevalence of vessels of the maximum size is a problem for the canal, as a Panamax ship is a tight fit that requires precise control of the vessel in the locks, possibly resulting in longer lock time, and requiring that these ships transit in daylight. Because the largest ships traveling in opposite directions cannot pass safely within the Culebra Cut, the canal effectively operates an alternating one-way system for these ships.

VLCC

VLCCs are large tankers with a capacity of 150,000 to 250,000 DWT. These ships can transport 2,000,000 barrels of oil/ 318 000 metric tons. As of August, 2012, there are more than 400 VLCCs worldwide.

Aframax

An Aframax ship is an oil tanker smaller than 120,000 metric tonnes and with a breadth above 32.31 m. Aframax class tankers are largely used in the basins of the Black Sea,the North Sea, the Caribbean Sea,the South and East China Seas, and the Mediterranean.Non-OPECexporting countries may require the use of tankers because the harbors and canals through which these countries export their oil are too small to accommodate very-large crude carriers and ultra-large crude carriers The term is based on the Average Freight Rate Assessment tanker rate system. Due to their favorable size, Aframax tankers can serve most ports in the world. These vessels serve regions which do not have very large ports or offshore oil terminals to accommodate very large crude carriers and ultra large crude carriers. Aframax tankers are optimal for short to medium haul crude oil transportation.

Suezmax

Suezmax is the ship capable of transiting the Suez Canal, and is almost exclusively used in reference to tankers with a capacity of 150,000 tons.

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