Container ships are cargo ships A cargo ship or freighter is any sort of ship or vessel that carries cargo, goods, and materials from one port to another. Thousands of cargo carriers ply the world's seas and oceans each year; they handle the bulk of international trade. Cargo ships are usually specially designed for the task, often being equipped with cranes and other mechanisms that carry all of their load in truck-size intermodal containers An intermodal container or freight container is a reusable transport and storage unit for moving products and raw materials between locations or countries; the terms container or box may be used on their own within the context of shipping. Containers manufactured to ISO specifications may be referred to as ISO containers and the term high-cube, in a technique called containerization Containerization is a system of intermodal freight transport using standard intermodal containers as prescribed by the International Organization for Standardization (ISO). These can be loaded and sealed intact onto container ships, railroad cars, planes, and trucks. They form a common means of commercial intermodal freight transport Intermodal freight transport involves the transportation of freight in an intermodal container or vehicle, using multiple modes of transportation , without any handling of the freight itself when changing modes. The method reduces cargo handling, and so improves security, reduces damages and losses, and allows freight to be transported faster.

Contents

History

The earliest container ships were converted tankers A tank ship or tankship, often referred to as a tanker, is a ship designed to transport liquids in bulk. Major types of tankship include the oil tanker, the chemical tanker, and the liquefied natural gas carrier, built up from surplus T2 tankers after World War II. In 1951 the first purpose-built container vessels began operating in Denmark Denmark is a constitutional monarchy with a parliamentary system of government. Denmark has a state-level government and local governments in 98 municipalities. Denmark has been a member of the European Union since 1973, although it has not joined the Eurozone. Denmark is a founding member of NATO and the OECD. Denmark is also a member of the, and between Seattle Seattle (pronounced /siːˈætəl/ see-AT-əl) is the northernmost major city in the contiguous United States, and the largest city in the Pacific Northwest and in the state of Washington. A seaport situated on an isthmus between Puget Sound (an arm of the Pacific Ocean) and Lake Washington, about 100 miles (160 km) south of the Canada – United and Alaska Alaska was purchased from the Russian Empire on March 30, 1867, for $7.2 million at about two cents per acre . The land went through several administrative changes before becoming an organized territory on May 11, 1912, and the 49th state of the U.S. on January 3, 1959.

The first container ship in the United States was the Ideal-X SS Ideal-X was the first container ship. It was an unconverted World War II T-2 oil tanker which carried shipping containers. On its maiden voyage on April 26, 1956, the Ideal X carried 58 containers from Newark, New Jersey to Port of Houston, Texas, where 58 trucks were waiting to be loaded with the containers [1], a T2 tanker, owned by Malcom McLean Malcom Purcell McLean (November 14, 1913 – May 25, 2001), born in Maxton, North Carolina, was an American entrepreneur, often called "the father of containerization". In 1956, he developed the metal shipping container, which replaced the traditional break bulk method of handling dry goods and revolutionized the transport of goods and, which carried 58 metal containers between Newark, New Jersey Newark is the largest city in New Jersey, and the county seat of Essex County. Newark has a population of 281,402, making it the largest municipality in New Jersey and the 65th largest city in the U.S. Newark is also home to major corporations, such as Prudential Financial and Houston, Texas Houston is the fourth-largest city in the United States and the largest city in the state of Texas. As of the 2009 U.S. Census estimate, the city had a population of 2.2 million within an area of 600 square miles (1,600 km2). Houston is the seat of Harris County and the economic center of the Houston–Sugar Land–Baytown metropolitan area—the on its first voyage, in April 1956.

Today, approximately 90% of non-bulk cargo Bulk cargo is commodity cargo that is transported unpackaged in large quantities. These cargos are usually dropped or poured, with a spout or shovel bucket, as a liquid or as a mass of relatively small solids , into a bulk carrier ship's hold, railroad car, or tanker truck/trailer/semi-trailer body. Bulk cargos are classified as liquid or dry worldwide is transported by container, and modern container ships can carry up to 15,000 Twenty-foot equivalent units The twenty-foot equivalent unit is an inexact unit of cargo capacity often used to describe the capacity of container ships and container terminals. It is based on the volume of a 20-foot long intermodal container, a standard-sized metal box which can be easily transferred between different modes of transportation, such as ships, trains and trucks (TEU). As a class, container ships now rival crude oil tankers and bulk carriers A bulk carrier, bulk freighter, or bulker is a merchant ship specially designed to transport unpackaged bulk cargo, such as grains, coal, ore, and cement in its cargo holds. Since the first specialized bulk carrier was built in 1852, economic forces have fueled the development of these ships, causing them to grow in size and sophistication. Today' as the largest commercial vessels on the ocean.

Construction

The "Zrin" container ship has self-unloading capability Container ship "CMA CGM Balzac" in the port of Zeebrugge Belgium.

Container ships are designed in a manner that optimizes space. Capacity is measured in Twenty-foot equivalent unit The twenty-foot equivalent unit is an inexact unit of cargo capacity often used to describe the capacity of container ships and container terminals. It is based on the volume of a 20-foot long intermodal container, a standard-sized metal box which can be easily transferred between different modes of transportation, such as ships, trains and trucks (TEU), the number of standard 20-foot containers measuring 20 × 8.0 × 8.5 feet A foot is a non-SI unit of length in a number of different systems including English units, Imperial units, and United States customary units. Its size can vary from system to system, but in each is around a quarter to a third of a meter. The most commonly used foot today is the international foot. There are three feet in a yard and 12 inches in a (6.1 × 2.4 × 2.6 metres The metre , symbol m, is the base unit of length in the International System of Units (SI). Originally intended to be one ten-millionth of the distance from the Earth's equator to the North Pole, its definition has been periodically refined to reflect growing knowledge of metrology. Since 1983, it is defined as the distance travelled by light in) a vessel can carry. This notwithstanding, most containers used today measure 40 feet (12 metres) in length. Above a certain size, container ships do not carry their own loading gear, so loading and unloading can only be done at ports with the necessary cranes. However, smaller ships with capacities up to 2,900 TEU The twenty-foot equivalent unit is an inexact unit of cargo capacity often used to describe the capacity of container ships and container terminals. It is based on the volume of a 20-foot long intermodal container, a standard-sized metal box which can be easily transferred between different modes of transportation, such as ships, trains and trucks are often equipped with their own cranes.

Informally known as "box boats," they carry the majority of the world's dry cargo Cargo is goods or produce transported, generally for commercial gain, by ship, aircraft, train, van or truck. In modern times, containers are used in most intermodal long-haul cargo transport, meaning manufactured goods. Cargoes like metal ores or coal or wheat are carried in bulk carriers A bulk carrier, bulk freighter, or bulker is a merchant ship specially designed to transport unpackaged bulk cargo, such as grains, coal, ore, and cement in its cargo holds. Since the first specialized bulk carrier was built in 1852, economic forces have fueled the development of these ships, causing them to grow in size and sophistication. Today'. There are large main line vessels that ply the deep sea routes, then many small "feeder" ships that supply the large ships at centralized hub ports A port is a location on a coast or shore containing one or more harbors where ships can dock and transfer people or cargo to or from land. Port locations are selected to optimize access to land and navigable water, for commercial demand, and for shelter from wind and waves. Ports with deeper water are rarer, but can handle larger, more economical. Most container ships are propelled by diesel engines A diesel engine is an internal combustion engine that uses the heat of compression to initiate ignition to burn the fuel, which is injected into the combustion chamber during the final stage of compression. This is in contrast to spark ignition engines such as a petrol engine (known as a gasoline engine in North America) or gas engine (using a, and have crews of between 20 and 40 people. They generally have a large accommodation block at the stern The stern is the rear or aft part of a ship or boat, technically defined as the area built up over the sternpost, extending upwards from the counter to the taffrail. The stern lies opposite of the bow, the foremost part of a ship. The stern side of a vessel is indicated with a white navigation light at night, near the engine room. Container ships now carry up to 15,000 TEU The twenty-foot equivalent unit is an inexact unit of cargo capacity often used to describe the capacity of container ships and container terminals. It is based on the volume of a 20-foot long intermodal container, a standard-sized metal box which can be easily transferred between different modes of transportation, such as ships, trains and trucks (approximately equivalent to 35 100-car double-stack intermodal Intermodal freight transport involves the transportation of freight in an intermodal container or vehicle, using multiple modes of transportation , without any handling of the freight itself when changing modes. The method reduces cargo handling, and so improves security, reduces damages and losses, and allows freight to be transported faster freight trains A freight train or goods train is a group of freight cars or goods wagons (UIC) hauled by a locomotive on a railway, ultimately transporting cargo between two points as part of the logistics chain. Trains may haul bulk, intermodal containers or specialized cars) on a voyage. The world's largest container ships, the M/V Emma Mærsk and her sisters, have a capacity of 15,200 containers.[2]

In 2008 the South Korean shipbuilder STX announced plans to construct a container ship capable of carrying 22,000 TEU The twenty-foot equivalent unit is an inexact unit of cargo capacity often used to describe the capacity of container ships and container terminals. It is based on the volume of a 20-foot long intermodal container, a standard-sized metal box which can be easily transferred between different modes of transportation, such as ships, trains and trucks,[3] and with a proposed length of 450 metres and a beam The beam of a ship is its width at the widest point. Generally speaking, the wider the beam of a ship , the more initial stability it has, at expense of reserve stability in the event of a capsize, where more energy is required to right the vessel from its inverted position. Typical length-to-beam ratios for small sailboats are from 2:1 (dinghies of 60 metres.[4] If constructed, the container ship would become the largest seagoing vessel in the world.[5]

Shipyards

Container fleet in 2006

Large container ships (over 7,000 TEU The twenty-foot equivalent unit is an inexact unit of cargo capacity often used to describe the capacity of container ships and container terminals. It is based on the volume of a 20-foot long intermodal container, a standard-sized metal box which can be easily transferred between different modes of transportation, such as ships, trains and trucks) have been built in the following shipyards:

Risk

Container ship "Rita" loading at Copenhagen with crew on deck.

The transit of these containers entails a great deal of risk.[citation needed]

Some of the risks are linked to the loading and unloading of containers. The risks involved in these operations affect both the cargo Cargo is goods or produce transported, generally for commercial gain, by ship, aircraft, train, van or truck. In modern times, containers are used in most intermodal long-haul cargo transport being moved onto or off the ship, as well as the ship itself. Containers, due to their fairly nondescript nature and the sheer number handled in major ports, require complex organization to ensure they are not lost, stolen or misrouted. In addition, as the containers and the cargo they contain make up the vast majority of the total weight of a cargo ship, the loading and unloading is a delicate balancing act, as it directly affects the centre of mass for the whole ship.[citation needed]

In March 2007, a London based container ship capsized in Antwerp, Belgium while loading[6].

Maneuvers in coastal waters and ports managed in the wheel house may be dangerous, as evidenced by a container ship hitting the San Francisco – Oakland Bay Bridge on November 7, 2007.[7]

It has been estimated that container ships lose over 10,000 containers Containerization is a system of intermodal freight transport using standard intermodal containers as prescribed by the International Organization for Standardization (ISO). These can be loaded and sealed intact onto container ships, railroad cars, planes, and trucks at sea each year.[8] Most go overboard on the open sea during storms but there are some examples of whole ships being lost with their cargo.[9] When containers are dropped, they immediately become an environmental threat—termed "marine debris Marine debris, also known as marine litter, is human-created waste that has deliberately or accidentally become afloat in a lake, sea, ocean or waterway. Oceanic debris tends to accumulate at the centre of gyres and on coastlines, frequently washing aground, when it is known as beach litter or tidewrack".

Modern loading instruments (like MACS3 with BELCO, SEALASH and DAGO modules) assist to reduce the risks, caused by incorrect stowage of container cargo.

Specifications

A container ship loading freight at the Mundra Port in India Home to the ancient Indus Valley Civilisation and a region of historic trade routes and vast empires, the Indian subcontinent was identified with its commercial and cultural wealth for much of its long history. Four major religions, Hinduism, Buddhism, Jainism and Sikhism originated here, while Zoroastrianism, Judaism, Christianity and Islam.

Cargo Cargo is goods or produce transported, generally for commercial gain, by ship, aircraft, train, van or truck. In modern times, containers are used in most intermodal long-haul cargo transport too large to carry in containers can be handled using flat racks, open top containers and platforms. There are also container ships called roll-on/roll-off Roll-on/roll-off ships are vessels designed to carry wheeled cargo such as automobiles, trucks, semi-trailer trucks, trailers or railroad cars that are driven on and off the ship on their own wheels. This is in contrast to lo-lo (lift on-lift off) vessels which use a crane to load and unload cargo (RORO), which utilize shore-based ramp systems for loading and unloading. ROROs are usually associated with shorter trade routes, as they are unable to carry the volume of crane A crane is a lifting machine, generally equipped with a winder , wire ropes or chains and sheaves, that can be used both to lift and lower materials and to move them horizontally. It uses one or more simple machines to create mechanical advantage and thus move loads beyond the normal capability of a human. Cranes are commonly employed in the-based container vessels. However, due to their flexibility and high speed, ROROs are frequently used in today's container markets.[citation needed]

Future

Economies of scale have dictated an upward trend in sizes of container ships in order to reduce costs. One limit on ship size is the "Suezmax Suezmax is a naval architecture term for the largest ships capable of transiting the Suez Canal fully loaded, and is almost exclusively used in reference to tankers. Since the canal has no locks, the only serious limiting factors are draft , and height due to the Suez Canal Bridge. The current channel depth of the canal allows for a maximum of 18.9" standard, or the largest theoretical ship capable of passing through the Suez Canal The Suez Canal is an artificial sea-level waterway in Egypt, connecting the Mediterranean Sea and the Red Sea. Opened in November 1869, it allows water transportation between Europe and Asia without navigating around Africa. The northern terminus is Port Said and the southern terminus is Port Tawfik at the city of Suez. Ismailia lies on its west, which measures 14,000 TEU The twenty-foot equivalent unit is an inexact unit of cargo capacity often used to describe the capacity of container ships and container terminals. It is based on the volume of a 20-foot long intermodal container, a standard-sized metal box which can be easily transferred between different modes of transportation, such as ships, trains and trucks. Such a vessel would displace 137,000 metric tons deadweight Deadweight tonnage is a measure of how much weight a ship is carrying or can safely carry. It is the sum of the weights of cargo, fuel, fresh water, ballast water, provisions, passengers, and crew. The term is often used to specify a ship's maximum permissible deadweight, the DWT when the ship is fully loaded so that its Plimsoll line is at the (DWT), be 400 meters long, more than 50 meters wide, have a draft of nearly 15 metres, and use more than 85 MW (113,987 hp) to achieve 25.5 knots, specifications met by the Emma Mærsk.

Beyond Suezmax lies the "Malaccamax Malaccamax is a naval architecture term for the largest size of ship capable of fitting through the 25 metres -deep Strait of Malacca. Because the Sunda Strait is even shallower at 20 metres (66 ft) minimum depth, a post-Malaccamax ship would need to use even longer alternate routes such as:" (for Straits of Malacca Coordinates: 1°26′N 102°53′E / 1.43°N 102.89°E) The Strait of Malacca is a narrow, 805 km stretch of water between Peninsular Malaysia (West Malaysia) and the Indonesian island of Sumatra. It is named after the Empire of Melaka that ruled over the archipelago between 1414 to 1511) ship of 18,000 TEU The twenty-foot equivalent unit is an inexact unit of cargo capacity often used to describe the capacity of container ships and container terminals. It is based on the volume of a 20-foot long intermodal container, a standard-sized metal box which can be easily transferred between different modes of transportation, such as ships, trains and trucks, displacing 300,000 DWT Deadweight tonnage is a measure of how much weight a ship is carrying or can safely carry. It is the sum of the weights of cargo, fuel, fresh water, ballast water, provisions, passengers, and crew. The term is often used to specify a ship's maximum permissible deadweight, the DWT when the ship is fully loaded so that its Plimsoll line is at the, 470 meters long, 60 meters wide, 16 meters of draft, and using more than 100 MW (134,102 hp) for 25.5 knots. This is most likely the limit before a major restructuring of world container trade routes.[10] The biggest constraint of this design, the absence of a capable single engine, has been overcome by the MAN B&W K108ME-C.

The ultimate problem was the absence of a manufacturer capable of producing the propeller needed for transmitting this power, which would be about 10 metres in diameter, and weigh 130 tonnes. One has since been built for the Emma Mærsk by Mecklenburger Metallguss GmbH in Waren, Germany. Other constraints, such as time in port and flexibility of service routes are similar to the constraints that eventually limited the growth in size of supertankers An oil tanker, also known as a petroleum tanker, is a ship designed for the bulk transport of oil. There are two basic types of oil tankers: the crude tanker and the product tanker. Crude tankers move large quantities of unrefined crude oil from its point of extraction to refineries. Product tankers, generally much smaller, are designed to move.

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