Cargo ship

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Cargo ship at Puerto Cortes in Honduras. Cargo Ship Puerto Cortes.jpg
Cargo ship at Puerto Cortés in Honduras.

A cargo ship or freighter is a merchant ship that carries cargo, goods, and materials from one port to another. Thousands of cargo carriers ply the world's seas and oceans each year, handling the bulk of international trade. Cargo ships are usually specially designed for the task, often being equipped with cranes and other mechanisms to load and unload, and come in all sizes. Today, they are almost always built of welded steel, and with some exceptions generally have a life expectancy of 25 to 30 years before being scrapped.[ citation needed ]

Contents

Definitions

A container ship unloading at Zanzibar, Tanzania Container Ship.jpg
A container ship unloading at Zanzibar, Tanzania
A US cargo ship off McMurdo Station, Antarctica MV American Tern at McMurdo Sound.jpg
A US cargo ship off McMurdo Station, Antarctica
General cargo ship Namibia Namibia (2007).jpg
General cargo ship Namibia

The words cargo and freight have become interchangeable in casual usage. Technically, "cargo" refers to the goods carried aboard the ship for hire, while "freight" refers to the act of carrying of such cargo, but the terms have been used interchangeably for centuries.

Generally, the modern ocean shipping business is divided into two classes:

  1. Liner business: typically (but not exclusively) container vessels (wherein "general cargo" is carried in 20- or 40-foot containers), operating as "common carriers", calling at a regularly published schedule of ports. A common carrier refers to a regulated service where any member of the public may book cargo for shipment, according to long-established and internationally agreed rules.
  2. Tramp-tanker business: generally this is private business arranged between the shipper and receiver and facilitated by the vessel owners or operators, who offer their vessels for hire to carry bulk (dry or liquid) or break bulk (cargoes with individually handled pieces) to any suitable port(s) in the world, according to a specifically drawn contract, called a charter party.

Larger cargo ships are generally operated by shipping lines: companies that specialize in the handling of cargo in general. Smaller vessels, such as coasters, are often owned by their operators.

Types

Cargo ships/freighters can be divided into eight groups, according to the type of cargo they carry. These groups are:

  1. Feeder ship
  2. General cargo vessels
  3. Container ships
  4. Tankers
  5. Dry bulk carriers
  6. Multi-purpose vessels
  7. Reefer ships
  8. Roll-on/roll-off vessels.

Rough synopses of cargo ship types

  1. General cargo vessels carry packaged items like chemicals, foods, furniture, machinery, motor- and military vehicles, footwear, garments, etc.
  2. Container ships (sometimes spelled containerships) are cargo ships that carry all of their load in truck-size intermodal containers, in a technique called containerization. They are a common means of commercial intermodal freight transport and now carry most seagoing non-bulk cargo. Container ship capacity is measured in twenty-foot equivalent units (TEU).
  3. Tankers carry petroleum products or other liquid cargo.
  4. Dry bulk carriers carry coal, grain, ore and other similar products in loose form.
  5. Multi-purpose vessels, as the name suggests, carry different classes of cargo – e.g. liquid and general cargo – at the same time.
  6. A Reefer, Reefer ships (or Refrigerated) ship is specifically designed [1] and used for shipping perishable commodities which require temperature-controlled, mostly fruits, meat, fish, vegetables, dairy products and other foodstuffs.
  7. Roll-on/roll-off (RORO or ro-ro) ships are designed to carry wheeled cargo, such as cars, trucks, semi-trailer trucks, trailers, and railroad cars, that are driven on and off the ship on their own wheels.
  8. Timber (Lumber) carriers that transport lumber, logs and related wood products. [2]

Specialized cargo ship types

Specialized types of cargo vessels include container ships and bulk carriers (technically tankers of all sizes are cargo ships, although they are routinely thought of as a separate category). Cargo ships fall into two further categories that reflect the services they offer to industry: liner and tramp services. Those on a fixed published schedule and fixed tariff rates are cargo liners. Tramp ships do not have fixed schedules. Users charter them to haul loads. Generally, the smaller shipping companies and private individuals operate tramp ships. Cargo liners run on fixed schedules published by the shipping companies. Each trip a liner takes is called a voyage. Liners mostly carry general cargo. However, some cargo liners may carry passengers also. A cargo liner that carries 12 or more passengers is called a combination or passenger-run-cargo line.

Size categories

Cargo ships are categorized partly by cargo or shipping capacity (tonnage), partly by weight (deadweight tonnage DWT), and partly by dimensions. Maximum dimensions such as length and width (beam) limit the canal locks a ship can fit in, water depth (draft) is a limitation for canals, shallow straits or harbors and height is a limitation in order to pass under bridges. Common categories include:

Ship measurements comparison.svg

The TI-class supertanker is an Ultra Large Crude Carrier, with a draft that is deeper than Suezmax, Malaccamax and Neopanamax. This causes Atlantic/Pacific routes to be very long, such as the long voyages south of Cape of Good Hope or south of Cape Horn to transit between Atlantic and Pacific oceans.

Lake freighters built for the Great Lakes in North America differ in design from sea water–going ships because of the difference in wave size and frequency in the lakes. A number of these ships are larger than Seawaymax and cannot leave the lakes and pass to the Atlantic Ocean, since they do not fit the locks on the Saint Lawrence Seaway.

History

A full-scale replica of a cog, a type of vessel commonly used for cargo in Northern Europe from the 10th to the 14th centuries Ubena von Bremen Kiel2007 2.jpg
A full-scale replica of a cog, a type of vessel commonly used for cargo in Northern Europe from the 10th to the 14th centuries

The earliest records of waterborne activity mention the carriage of items for trade; the evidence of history and archaeology shows the practice to be widespread by the beginning of the 1st millennium BC, and as early as the 14th and 15th centuries BC small Mediterranean cargo ships like those of the 50 foot long (15–16 metre) Uluburun ship were carrying 20 tons of exotic cargo; 11 tons of raw copper, jars, glass, ivory, gold, spices, and treasures from Canaan, Greece, Egypt, and Africa. The desire to operate trade routes over longer distances, and throughout more seasons of the year, motivated improvements in ship design during the Middle Ages.

Before the middle of the 19th century, the incidence of piracy resulted in most cargo ships being armed, sometimes quite heavily, as in the case of the Manila galleons and East Indiamen. They were also sometimes escorted by warships.

Piracy

Piracy is still quite common in some waters, particularly in the Malacca Straits, a narrow channel between Indonesia and Singapore / Malaysia, and cargo ships are still commonly targeted. In 2004, the governments of those three nations agreed to provide better protection for the ships passing through the Straits. The waters off Somalia and Nigeria are also prone to piracy, while smaller vessels are also in danger along parts of the South American coasts, Southeast Asian coasts, and near the Caribbean Sea. [7] [8]

Vessel prefixes

A category designation appears before the vessel's name. A few examples of prefixes for naval ships are "USS" (United States Ship), "HMS" (Her/His Majesty’s Ship), "HMCS" (Her/His Majesty's Canadian Ship) and "HTMS" (His Thai Majesty's Ship), while a few examples for prefixes for merchant ships are "RMS" (Royal Mail Ship, usually a passenger liner), "MV" (Motor Vessel, powered by diesel), "MT" (Motor Tanker, powered vessel carrying liquids only) "FV" Fishing Vessel and "SS" (Screw Steamer, driven by propellers or screws, often understood to stand for Steamship). "TS", sometimes found in first position before a merchant ship's prefix, denotes that it is a Turbine Steamer.

Famous cargo ships

Famous cargo ships include the 2,710 Liberty ships of World War II, partly based on a British design. Liberty ship sections were prefabricated in locations across the United States and then assembled by shipbuilders in an average of six weeks, with the record being just over four days. These ships allowed the Allies in World War II to replace sunken cargo vessels at a rate greater than the Kriegsmarine's U-boats could sink them, and contributed significantly to the war effort, the delivery of supplies, and eventual victory over the Axis powers. Liberty ships were followed by the faster Victory ships. Canada built Park ships and Fort ships to meet the demand for the Allies shipping. The United Kingdom built Empire ships and used US Ocean ships. After the war many of the ships were sold to private companies. The Ever Given is a ship that was lodged into the Suez Canal from March 25 to 28, 2021, which caused a halt on maritime trade. [9] [10] [11] [12] The MV Dali, which collided with the Francis Scott Key Bridge in Baltimore, Maryland, United States, on 26 March 2024, causing a catastrophic structural failure of the bridge that resulted in at least 6 deaths. [13] [14]

Pollution

Due to its low cost, most large cargo vessels are powered by bunker fuel, also known as heavy fuel oil, which contains higher sulphur levels than diesel. [15] This level of pollution is increasing: [16] with bunker fuel consumption at 278 million tonnes per year in 2001, it is projected to be at 500 million tonnes per year in 2020. [17] International standards to dramatically reduce sulphur content in marine fuels and nitrogen oxide emissions have been put in place. Among some of the solutions offered is changing over the fuel intake to clean diesel or marine gas oil, while in restricted waters and cold ironing the ship while it is in port. The process of removing sulphur from the fuel impacts the viscosity and lubricity of the marine gas oil though, which could cause damage in the engine fuel pump. The fuel viscosity can be raised by cooling the fuel down. [18] If the various requirements are enforced, the International Maritime Organization's marine fuel requirement will mean a 90% reduction in sulphur oxide emissions; [19] whilst the European Union is planning stricter controls on emissions. [20]

Environmental impact

Cargo ships have been reported to have a possible negative impact on the population of whale sharks. Smithsonian Magazine reported in 2022 that whale sharks, the largest species of fish, have been disappearing mysteriously over the past 75 years, with research pointing to cargo ships and large vessels as the likely culprits. [21] A study involving over 75 researchers highlighted the danger posed to whale sharks by shipping activities in various regions, including Ecuador, Mexico, Malaysia, the Philippines, Oman, Seychelles, and Taiwan. [22]

See also

Related Research Articles

Ship Large watercraft

A ship is a large vessel that travels the world's oceans and other navigable waterways, carrying cargo or passengers, or in support of specialized missions, such as defense, research and fishing. Ships are generally distinguished from boats, based on size, shape, load capacity and purpose. Ships have supported exploration, trade, warfare, migration, colonization, and science. Ship transport is responsible for the largest portion of world commerce.

<span class="mw-page-title-main">Maritime transport</span> Transport of people or goods via waterways

Maritime transport or more generally waterborne transport, is the transport of people (passengers) or goods (cargo) via waterways. Freight transport by sea has been widely used throughout recorded history. The advent of aviation has diminished the importance of sea travel for passengers, though it is still popular for short trips and pleasure cruises. Transport by water is cheaper than transport by air or ground, but significantly slower for longer distances. Maritime transport accounts for roughly 80% of international trade, according to UNCTAD in 2020.

Container ship Ship that carries cargo in intermodal containers

A container ship is a cargo ship that carries all of its load in truck-size intermodal containers, in a technique called containerization. Container ships are a common means of commercial intermodal freight transport and now carry most seagoing non-bulk cargo.

<span class="mw-page-title-main">Mitsui O.S.K. Lines</span> Japanese shipping company

Mitsui O.S.K. Lines is a Japanese transport company headquartered in Toranomon, Minato, Tokyo, Japan. It is one of the largest shipping companies in the world.

Panamax Largest ships that can transit the Panama Canal

Panamax and New Panamax are terms for the size limits for ships travelling through the Panama Canal. The limits and requirements are published by the Panama Canal Authority (ACP) in a publication titled "Vessel Requirements". These requirements also describe topics like exceptional dry seasonal limits, propulsion, communications, and detailed ship design.

<span class="mw-page-title-main">Merchant ship</span> Civilian boat or ship that transports cargo or carries passengers for hire

A merchant ship, merchant vessel, trading vessel, or merchantman is a watercraft that transports cargo or carries passengers for hire. This is in contrast to pleasure craft, which are used for personal recreation, and naval ships, which are used for military purposes.

<span class="mw-page-title-main">Tramp trade</span> Cargo shipping without a fixed schedule

A boat or ship engaged in the tramp trade is one which does not have a fixed schedule, itinerary nor published ports of call, and trades on the spot market as opposed to freight liners. A steamship engaged in the tramp trade is sometimes called a tramp steamer; similar terms, such as tramp freighter and tramper, are also used. Chartering is done chiefly on London, New York, and Singapore shipbroking exchanges. The Baltic Exchange serves as a type of stock market index for the trade.

Bulk carrier Ship made to transport unpackaged bulk cargo

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. Today's bulk carriers are specially designed to maximize capacity, safety, efficiency, and durability.

<span class="mw-page-title-main">Short-sea shipping</span> Movement of cargo and passengers by sea along a coast, without crossing an ocean

The modern terms short-sea shipping, marine highway and motorways of the sea, as well as the more historical terms coastal trade, coastal shipping, coasting trade and coastwise trade, all encompass the movement of cargo and passengers mainly by sea along a coast, without crossing an ocean.

<span class="mw-page-title-main">Tanker (ship)</span> Ship designed to transport liquids or gases in bulk

A tanker is a ship designed to transport or store liquids or gases in bulk. Major types of tankship include the oil tanker, the chemical tanker, cargo ships, and a gas carrier. Tankers also carry commodities such as vegetable oils, molasses and wine. In the United States Navy and Military Sealift Command, a tanker used to refuel other ships is called an oiler but many other navies use the terms tanker and replenishment tanker. Tankers were first developed in the late 19th century as iron and steel hulls and pumping systems were developed. As of 2005, there were just over 4,000 tankers and supertankers 10,000 LT DWT or greater operating worldwide.

<span class="mw-page-title-main">Capesize</span> Class of dry cargo ships too large to transit the Panama or Suez Canals

Capesize ships are the largest dry cargo ships with ball mark dimension: about 170,000 DWT capacity, 290 m long, 45 m beam (wide), 18m draught. They are too large to transit the Suez Canal or Panama Canal, and so have to pass either Cape Agulhas or Cape Horn to traverse between oceans.

Suezmax Largest ships that can transit the Suez Canal

"Suezmax" is a naval architecture term for the largest ship measurements capable of transiting the Suez Canal in a laden condition, and is almost exclusively used in reference to tankers. The limiting factors are beam, draft, height, and length.

Malaccamax Largest ships that can transit the Strait of Malacca

Malaccamax is a naval architecture term for the largest tonnage of ship capable of fitting through the 25-metre-deep (82 ft) Strait of Malacca. Bulk carriers and supertankers have been built to this tonnage, and the term is chosen for very large crude carriers (VLCC). They can transport oil from Arabia to China. A typical Malaccamax tanker can have a maximum length of 333 m (1,093 ft), beam of 60 m (197 ft), draught of 20.5 m (67.3 ft), and tonnage of 300,000 DWT.

<span class="mw-page-title-main">MISC Berhad</span> Malaysian shipping company

MISC Berhad was incorporated in 1968 as Malaysia International Shipping Corporation Berhad and is the leading international shipping line of Malaysia. In September 2005, Malaysia International Shipping Corporation Berhad adopted its present corporate identity and changed its name to MISC Berhad. Its main shareholder is Petroliam Nasional Berhad (Petronas), the national oil conglomerate of Malaysia. The principal business of the corporation consist of ship owning, ship operating, other shipping related activities, owning and operating of offshore floating facilities as well as marine repair, marine conversion and engineering and construction works. With a fleet of more than 120 vessels and a combined tonnage of more than 13,000,000 DWT.

<span class="mw-page-title-main">Ore-bulk-oil carrier</span> Type of bulk cargo ship

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. These are a feature of the larger bulk trades.

<span class="mw-page-title-main">LNG carrier</span> Tank ship transporting liquefied natural gas

An LNG carrier is a tank ship designed for transporting liquefied natural gas (LNG).

Oil tanker Ship that carries petroleum

An oil tanker, also known as a petroleum tanker, is a ship designed for the bulk transport of oil or its products. There are two basic types of oil tankers: crude tankers and product tankers. 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 refined products from refineries to points near consuming markets.

<span class="mw-page-title-main">History of the oil tanker</span>

The history of the oil tanker is part of the evolution of the technology of oil transportation alongside the oil industry.

Chinamax Ship size class

Chinamax is a standard of ship measurements that allow conforming ships to use various harbours when fully laden, the maximum size of such a ship being 24 m (79 ft) draft, 65 m (213 ft) beam and 360 m (1,180 ft) length overall. An example of ships of this size is the Valemax bulk carriers.

<i>MSC Oliver</i>

MSC Oliver is one of the largest container vessels in the world, together with her sister ships MSC Oscar, MSC Zoe, MSC Maya and MSC Sveva. The vessel was delivered in March 2015 by Daewoo Shipbuilding and Marine Engineering. According to the official statement of the CEO of Mediterranean Shipping Company, the ships are part from a bulk order for 20 vessels with same size, which will be used for cost optimizations of the company. With the new ships, the management of MSC are trying to fight the low freight rates and increased capacities of shipping.

References

Citations

  1. ↑ "Article: from publication on types of Reefer Ships by Capt. Pawanexh Kohli" (PDF). Archived from the original (PDF) on March 26, 2009.
  2. ↑ "Understanding Lumber Carrier Vessels". Marine Insight. July 13, 2021. Retrieved February 28, 2024.
  3. ↑ "The New Panamax; 13,200-TEU Containership, 120,000 dwt Bulk Carrier". Shipping Research and Finance. September 12, 2012.
  4. ↑ "Types of vessel sizes and Bulk Carriers - A One Maritime".
  5. ↑ Cho Jae-eun (July 9, 2008). "Korea launches new tankers. Qatar-bound Mozah is the biggest LNG carrier ever built". Korea JoongAng Daily . Retrieved August 2, 2008.
  6. ↑ Curt, Bob (March 29, 2004). Marine Transportation of LNG (PDF). Intertanko Conference. Maritime Administration. Archived from the original (PDF) on July 22, 2011. Retrieved July 30, 2011.
  7. ↑ "Documentaries - Pirates - Part Two". BBC World Service.
  8. ↑ "Pirates, Warlords and Rogue Fishing Vessels in Somalia's Unruly Seas".
  9. ↑ MARAD, Victory Ship, U.S. Maritime Commission design type VC2-S-AP2
  10. ↑ "Canada Parks History and culture". Archived from the original on July 29, 2019. Retrieved August 3, 2019.
  11. ↑ "British Order Sixty 10,000 Dwt. Cargo Steamers". Pacific Marine Review. Consolidated 1941 issues (January 1941). Pacific American Steamship Association/Shipowners' Association of the Pacific Coast: 42–43. 1941. Retrieved August 12, 2014.
  12. ↑ Mitchell, William Harry & Sawyer, Leonard Arthur (1990). The Empire Ships (2nd ed.). London, New York, Hamburg, Hong Kong: Lloyd's of London Press Ltd. ISBN   1-85044-275-4.
  13. ↑ Ng, Greg (March 26, 2024). "'Key Bridge is gone': Ship strike destroys bridge, state of emergency declared". WBAL. Archived from the original on March 26, 2024. Retrieved March 26, 2024.
  14. ↑ "6 workers presumed dead after cargo ship crash levels Baltimore bridge". NBC News. March 27, 2024. Retrieved March 27, 2024. Archived 26 March 2024 at the Wayback Machine
  15. ↑ Vidal, John (April 9, 2009), "Health risks of shipping pollution have been 'underestimated'", The Guardian , retrieved June 11, 2012
  16. ↑ Pollution impact from ships - article on Cold ironing
  17. ↑ Global Trade and Fuels Assessment— Additional ECA Modeling Scenarios (PDF), United States Environmental Protection Agency, May 2009, EPA-420-R-09-009, archived from the original (PDF) on August 1, 2013, retrieved June 11, 2012
  18. ↑ "MGO Cooler". heinenhopman.com. September 12, 2016.
  19. ↑ Air Pollution from Ships (PDF), November 2011, archived from the original (PDF) on July 28, 2013, retrieved June 11, 2012
  20. ↑ "EU launches attempt to deliver shipping emissions trading scheme". www.businessgreen.com. January 24, 2012.
  21. ↑ Magazine, Smithsonian; Kuta, Sarah. "Cargo Ships Are Killing Whale Sharks". Smithsonian Magazine. Retrieved May 24, 2024.
  22. ↑ Hobson, Melissa (May 23, 2024). "The world's largest fish are vanishing without a trace". National Geographic . Archived from the original on May 24, 2024. Retrieved May 24, 2024.

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