Merchant ship

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Historical merchant trading ship: a Dutch fluyt cargo vessel from the late 17th century Wenceslas Hollar - A Flute (State 2).jpg
Historical merchant trading ship: a Dutch fluyt cargo vessel from the late 17th century

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.

Contents

They come in myriad sizes and shapes, from six-metre (20 ft) inflatable dive boats in Hawaii, to 5,000-passenger casino vessels on the Mississippi River, to tugboats plying New York Harbor, to 300-metre (1,000 ft) oil tankers and container ships at major ports, to passenger-carrying submarines in the Caribbean. [1]

Many merchant ships operate under a "flag of convenience" from a country other than the home of the vessel's owners, such as Liberia and Panama, which have more favorable maritime laws than other countries.

The Greek merchant marine is the largest in the world. Today, the Greek fleet accounts for some 16 per cent of the world's tonnage; this makes it currently the largest single international merchant fleet in the world, albeit not the largest in history. [2]

During wars, merchant ships may be used as auxiliaries to the navies of their respective countries, and are called upon to deliver military personnel and materiel.

History

Definitions

The term "commercial vessel" is defined by the United States Coast Guard as any vessel (i.e. boat or ship) engaged in commercial trade or that carries passengers for hire.

In English, the term "Merchant Navy" without further clarification is used to refer to the British Merchant Navy; the United States merchant fleet is known as the United States Merchant Marine.

Name prefixes

Merchant ships' names have a prefix to indicate which kind of vessel they are: [3]

Merchant ship categories

Roll-on/roll-off vessel Galaxy Leader Car carrier Galaxy Leader.jpg
Roll-on/roll-off vessel Galaxy Leader

The UNCTAD review of maritime transport categorizes ships as: oil tankers, bulk (and combination) carriers, general cargo ships, container ships, and "other ships", which includes "liquefied petroleum gas carriers, liquefied natural gas carriers, parcel (chemical) tankers, specialized tankers, reefers, offshore supply, tugs, dredgers, cruise, ferries, other non-cargo". General cargo ships include "multi-purpose and project vessels and Roll-on/roll-off cargo". [5]

Cargo ship

General cargo vessel Namibia Namibia (2007).jpg
General cargo vessel Namibia

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 to load and unload, and come in all sizes.

Bulk carrier

Bulk carrier Sabrina I Sabrina I.jpg
Bulk carrier Sabrina I

A bulk carrier is a ship used to transport bulk cargo items such as iron ore, bauxite, coal, cement, grain and similar cargo. Bulk carriers can be recognized by large box-like hatches on deck, designed to slide outboard or fold fore-and-aft to enable access for loading or discharging cargo. The dimensions of bulk carriers are often determined by the ports and sea routes that they need to serve, and by the maximum width of the Panama Canal. Most lakes are too small to accommodate bulk carriers, but a large fleet of lake freighters has been plying the Great Lakes and St. Lawrence Seaway of North America for over a century.

Container ship

Container ship Colombo Express built in 2005 Colombo.Express.wmt.jpg
Container ship Colombo Express built in 2005

A container ship is a cargo ship that carries its cargo in standardized containers, in a technique called containerization. These ships are a common means of commercial intermodal freight transport.

Tanker

Crude oil supertanker AbQaiq Supertanker AbQaiq.jpg
Crude oil supertanker AbQaiq

A tanker is a ship designed to transport liquids in bulk. Tankers can range in size from several hundred tons, designed to serve small harbours and coastal settlements, to several hundred thousand tons, with these being designed for long-range haulage. A wide range of products are carried by tankers, including:

Different products require different handling and transport, thus special types of tankers have been built, such as chemical tankers, oil tankers, and gas carriers.

Among oil tankers, supertankers were designed for carrying oil around the Horn of Africa from the Middle East; the FSO Knock Nevis being the largest vessel in the world, a ULCC supertanker formerly known as Jahre Viking (Seawise Giant). It has a deadweight of 565,000 metric tons and length of about 458 meters (1,500 ft). The use of such large ships is in fact very unprofitable, due to the inability to operate them at full cargo capacity; hence, the production of supertankers has currently ceased. Today's largest oil tankers in comparison by gross tonnage are TI Europe, TI Asia, TI Oceania, which are the largest sailing vessels today. But even with their deadweight of 441,585 metric tons, sailing as VLCC most of the time, they do not use more than 70% of their total capacity.

Apart from pipeline transport, tankers are the only method for transporting large quantities of oil, although such tankers have caused large environmental disasters when sinking close to coastal regions, causing oil spills. See Braer, Erika , Exxon Valdez , Prestige and Torrey Canyon for examples of tankers that have been involved in oil spills.

Coastal trading vessel

Coastal trading vessels are smaller ships that carry any category of cargo along coastal, rather than trans-oceanic, routes. Coasters are shallow-hulled ships used for trade between locations on the same island or continent. Their shallow hulls allow them to sail over reefs and other submerged navigation hazards, whereas ships designed for blue-water trade usually have much deeper hulls for better seakeeping.

Passenger ship

Cruise ship Ocean Countess Ocean Countess (2012).jpg
Cruise ship Ocean Countess
River cruise ship, Avalon Expression Avalon Expression (ship, 2013) 011.JPG
River cruise ship, Avalon Expression

A passenger ship is a ship whose primary function is to carry passengers. The category does not include cargo vessels which have accommodations for limited numbers of passengers, such as the formerly ubiquitous twelve-passenger freighters in which the transport of passengers is secondary to the carriage of freight. The type does however include many classes of ships which are designed to transport substantial numbers of passengers as well as freight. Indeed, until recently virtually all ocean liners were able to transport mail, package freight and express, and other cargo in addition to passenger luggage, and were equipped with cargo holds and derricks, kingposts, or other cargo-handling gear for that purpose. Modern cruiseferries have car decks for lorries as well as the passengers' cars. Only in more recent ocean liners and in virtually all cruise ships has this cargo capacity been removed. A ferry is a boat or ship carrying passengers and sometimes their vehicles. Ferries are also used to transport freight (in lorries and sometimes unpowered freight containers) and even railroad cars (in the case of a train ferry).

See also

Related Research Articles

Ship Large watercraft

A ship is a large watercraft that travels the world's oceans and other sufficiently deep 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. After the 15th century, new crops that had come from and to the Americas via the European seafarers significantly contributed to world population growth. Ship transport is responsible for the largest portion of world commerce.

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.

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<span class="mw-page-title-main">Cargo ship</span> Ship or vessel that carries goods and materials

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.

<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.

<span class="mw-page-title-main">Port of Hong Kong</span> Port in Hong Kong

The Port of Hong Kong, located by the South China Sea, is a deepwater seaport dominated by trade in containerised manufactured products, and to a lesser extent raw materials and passengers. A key factor in the economic development of Hong Kong, the natural shelter and deep waters of Victoria Harbour provide ideal conditions for berthing and the handling of all types of vessels. It is one of the busiest ports in the world, in the three categories of shipping movements, cargo handled and passengers carried. This makes Hong Kong a Large-Port Metropolis.

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 grains, 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 continued development of these ships, resulting in increased size and sophistication. Today's bulk carriers are specially designed to maximize capacity, safety, efficiency, and durability.

<span class="mw-page-title-main">Bulk cargo</span> Commodity cargo transported unpackaged in large quantities

Bulk cargo is commodity cargo that is transported unpackaged in large quantities.

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<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, and 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.

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Oil tanker Ship that carries oil

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<span class="mw-page-title-main">BP Shipping</span>

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<span class="mw-page-title-main">Gas carrier</span> Ship designed to transport liquefied chemical gases in bulk

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References

  1. "Summary of the Report from the Passenger Vessel Access Advisory Committee". Archived from the original on 14 April 2012. Retrieved 24 April 2012.
  2. "Review of Maritime Transport 2007, Chapter 2, Structure and ownership of the world fleet, p. 45" (PDF).
  3. Dasgupta, Soumyajit (4 March 2013). "What are Ship Prefixes for Navy and Merchant Vessels?". Marine Insight. Retrieved 30 October 2018.
  4. "Rich Atlantic International --- Ship Prefix --- Glossary". 5 August 2012. Archived from the original on 5 August 2012. Retrieved 27 November 2019.
  5. Hoffmann, Jan; Asariotis, Regina; Benamara, Hassiba; Premti, Anila; Valentine, Vincent; Yousse, Frida (2016), "Review of Maritime Transport 2016" (PDF), Review of Maritime Transport, United Nations: 104, ISBN   978-92-1-112904-5, ISSN   0566-7682