Editing Container ship

{{Short description|Ship that carries cargo in intermodal containers}}
{{Cleanup|date=June 2024|reason=The "Sources" section needs to match existing short citations under "References", or be moved to a "Further reading" section. See [[Talk:Container ship#Further reading or Bibliography?|discussion]].}}
{|{{Infobox ship begin}}
{{Infobox ship image
|Ship image=MAERSK MC KINNEY MÖLLER & MARSEILLE MAERSK (48694054418).jpg
|Ship caption=Two [[Maersk Line]] container ships
}}
{{Infobox ship class overview
|Name=Container ship
|Builders=
|Operators=
|Class before=
|Class after=
|Subclasses=*(1) Geared or gearless (as per cargo-handling type)
*(2) Freighter or pure container (as per passenger carrier-type)
*(3) Feeder or world-wide foreign-going vessel (as per trade)
*(4) Panamax or post-Panamax vessel (as per breadth of vessel < or > than 32.2m respectively)
|Cost=
|Built range=1956–present
|In service range=9,535 ships as of 2010<ref name="unctad33">UNCTAD, 2010, p. 33.</ref>
|In commission range=
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|Total ships cancelled,
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|Total ships preserved=
}}
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|Ship propulsion= Typically [[marine diesel engine|diesel]] since 1990<ref name="mcnich-45"/>
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|Ship speed= Typically {{convert|16|–|25|kn|kph}} (19-29 mph)<ref name="mcnich-45"/>
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|Ship capacity= Up to {{TEU|24,000}}
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|Ship notes=Reduced superstructure, containers stacked on deck, [[bulbous bow]]
}}
|}
A '''container ship''' (also called '''boxship''' or spelled '''containership''') is a [[cargo ship]] that carries all of its load in truck-size [[intermodal container]]s, in a technique called [[containerization]]. Container ships 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 unit]]s (TEU). Typical loads are a mix of 20-foot (1-TEU) and 40-foot (2-TEU) [[ISO 668|ISO-standard containers]], with the latter predominant.

Today, about 90% of non-[[bulk cargo]] worldwide is transported by container ships, the largest of which, from 2023 onward, can carry over 24,000 TEU.

==History==
[[File:Korean-war-merchant-marine-load.jpg|thumb|Container ships avoid the complex [[stevedore|stevedoring]] of [[break bulk cargo|break-bulk shipping]]]]
[[File:US T2 WW2 tanker Hat Creek.JPG|thumb|The earliest container ships were converted [[T2 tanker]]s in the 1940s after [[World War II]]]]
[[File:Río Saigón, Ciudad Ho Chi Minh, Vietnam, 2013-08-14, DD 21.JPG|thumbnail|Container ship ''Tan Cang 15'' on the [[Saigon River]] in [[Ho Chi Minh City]], Vietnam]]
[[File:Container Ship.jpg|thumb|A [[Delmas (shipping company)|Delmas]] container ship unloading at the Zanzibar port in Tanzania]]
[[File:HELGA 2003.jpg|thumb|Container [[feeder ship|feeder]] ''Helga'' arriving at [[Greenock]]]]
[[File:Rhoneborg.jpg|thumb|Open-top containership ''Rhoneborg'' at [[Fremantle]]]]

There are two main types of dry cargo: [[bulk cargo]] and [[break bulk cargo]]. Bulk cargoes, like grain or coal, are transported unpackaged in the hull of the ship, generally in large volume.<ref>{{cite web |url=http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA439918&Location=U2&doc=GetTRDoc.pdf |archive-url=https://web.archive.org/web/20110604203854/http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA439918&Location=U2&doc=GetTRDoc.pdf |url-status=dead |archive-date=June 4, 2011 |author=Joint Chief of Staff |author-link=Joint Chief of Staff |title=Bulk cargo |date=2005-08-31 |work=Department of Defense Dictionary of Military and Associated Terms |publisher=Department of Defense |location=Washington |page=73 |access-date=2011-02-22 }}</ref> Break-bulk cargoes, in contrast, are transported in packages, and are generally manufactured goods.<ref>From the American Heritage dictionary definition available on-line at {{cite web |url=http://www.thefreedictionary.com/break-bulk|title=Break bulk |author=Houghton Mifflin Company |year=2003 |work=The American Heritage Dictionary of the English Language, Fourth Edition |publisher=Farlex Inc. |location=Huntingdon Valley, PA |access-date=2011-02-22 }}.</ref>

Before the advent of containerization in the 1950s, break-bulk items required  manual loading, lashing, unlashing and unloading from the ship one piece at a time. This [[stevedoring]] process became more efficient by grouping cargo into containers, {{convert|1000|to|3000|cuft|m3}} of cargo, or up to about {{convert|64000|lb|kg}}, is moved at once and each container is secured to the ship once in a standardized way.<ref>Meurn, 2004, pp. 1–7.</ref> Containerization has increased the efficiency of moving traditional break-bulk cargoes significantly, reducing shipping time by 84% and costs by 35%.<ref>Bohlman, 2001, p. 13.</ref> In 2001, more than 90% of world trade in non-bulk goods was transported in ISO containers.<ref>Bohlman, 2001, p. 15.</ref> In 2009, almost one quarter of the world's dry cargo was shipped by container, an estimated 125 million TEU or 1.19 billion tonnes worth of cargo.<ref name="unctad84">UNCTAD, 2010, p. 84.</ref>

The first ships designed to carry standardized load units were used in the late 18th century in England. In 1766 [[James Brindley]] designed the box boat "Starvationer" with 10 wooden containers, to transport coal from [[Worsley]] Delph to Manchester via the [[Bridgewater Canal]].<ref name="TransportMeans2016" >{{Cite journal | first = Krzysztof | last =  Lewandowski | title = The containers ships, which really was the first? | journal =  Transport Means 2016, Proceedings of the 20th International Scientific Conference, October 5–7, 2016, Juodkrante, Lithuania. |  year =  2016 | pages = 668–676 | issn = 1822-296X }}</ref> Before the [[World War II|Second World War]], the first container ships were used to carry the baggage of the luxury passenger train from London to Paris ([[Southern Railway (UK)|Southern Railway's]] [[Golden Arrow (train)|Golden Arrow]] / [[La Flèche d'Or]]). These containers were loaded in London or Paris, and carried to ports of Dover or Calais on flat cars.<ref name="logistica2014a" >{{Cite journal | first = Krzysztof | last =  Lewandowski | title = Czechoslovak activity to prepare European norms for containers before the Second World War | journal =  Acta Logistica | volume =  1 | year =  2014 | issue = 4 | pages = 1–7 | issn = 1339-5629 | url = https://www.researchgate.net/publication/270794211| format = PDF | doi =  10.22306/al.v1i4.25 | doi-access = free }}</ref> In February 1931, the first container ship in the world was launched; the ''[[SS Autocarrier|Autocarrier]]'', owned by the Southern Railway. It had 21 slots for containers of Southern Railway.<ref name="TransportMeans2016"/><ref name="S/S AUTOCARRIER"> | url= http://www.faktaomfartyg.se/autocarrier_1931_b_1.htm</ref>

The earliest container ships after the Second World War were converted oil [[Tanker (ship)|tanker]]s, built up from surplus [[T2 tanker]]s after World War II. In 1951, the first purpose-built container vessels began operating in [[Denmark]], and between [[Seattle]] and [[Alaska]]. The first commercially successful container ship was {{SS|Ideal X||2}},<ref>Levinson, 2006, p. 1.</ref> a T2 tanker, owned by [[Malcom McLean]], which carried 58 metal containers between [[Newark, New Jersey]] and [[Houston, Texas]], on its first voyage.<ref name="meurn1-3">Meurn, 2004, pp. 1–3.</ref> In 1955, McLean built his company, McLean Trucking into one of the United States' biggest freighter fleets. In 1955, he purchased the small Pan Atlantic Steamship Company from [[Waterman Steamship]] and adapted its ships to carry cargo in large uniform metal containers.<ref name="cud19">Cudahy, 2004, p. 19.</ref> On April 26, 1956, the first of these rebuilt container vessels, ''Ideal X'', left the [[Port Newark]] in New Jersey and a new revolution in modern shipping resulted.<ref name="cud29">Cudahy, 2004, p. 29.</ref><ref>{{Cite web | url=http://www.panynj.gov/port/history.html | title=History - Port of New York and New Jersey - Port Authority of New York & New Jersey}}</ref>

In the 1950s, a new standardized steel [[Intermodal container]] based on specifications from the [[United States Department of Defense]] began to revolutionize freight transportation.

The [[White Pass & Yukon Route]] railway acquired the world's first purpose built container ship, the ''Clifford J. Rogers'', built in 1955, and introduced containers to its railway in 1956.<ref>{{Citation |title=Intermodal freight transport |date=2024-06-04 |work=Wikipedia |url=https://en.wikipedia.org/w/index.php?title=Intermodal_freight_transport&oldid=1227269695 |access-date=2024-06-19 |language=en}}</ref>

[[MV Kooringa|MV ''Kooringa'']] was the world's first fully [[Cellular vessel|cellular]], purpose-built container ship.<ref>{{cite web |title=First purpose-built cellular container ship |url=https://www.guinnessworldrecords.com/world-records/736407-first-purpose-built-cellular-container-ship |website=Guiness World Records |access-date=19 April 2024}}</ref> and was built by Australian company Associated Steamships, a partnership formed by the 1964 merger of the [[Adelaide Steamship Company]] with [[McIlwraith, McEacharn & Co]], then commissioned in May 1964.<ref>{{cite web |title=Adelaide Steamship Co. |url=https://www.theshipslist.com/ships/lines/adelaide.shtml |website=TheShipsList.com |publisher=The Ships List |access-date=19 April 2024}}</ref>

Container ships were designed to accommodate intermodal transport of goods,<ref>{{cite web |title=Understanding Design Of Container Ships |url=https://www.marineinsight.com/naval-architecture/understanding-design-of-container-ships/ |website=Marine Insight |access-date=19 April 2024 |date=2019-07-22}}</ref> and eliminated requirements for the individual hatches, holds and other dividers of traditional [[cargo ship]]s. The hull of a typical container ship is similar to an airport hangar, or a huge warehouse, which is divided into individual holding cells, using vertical guide rails. The ship's cells are designed to hold cargo containers, which are typically constructed of steel, though sometimes of aluminum, fiberglass or plywood, and designed for intermodal transfers between ship and [[Rail freight transport|train]], [[truck]] or [[semi-trailer]]. Shipping containers are categorized by type, size and function.<ref>{{cite web |title="Cargo Packaging and unitization" |url=https://www.asean.org/wp-content/uploads/images/2015/september/transport-facilitation/batch-1/Cargo-Packaging-and-unitization/Chapter%202%20Cargo%20Vessel_ASEAN%20disclaimer.pdf |website=ASEAN.org |publisher=Association of Southeast Asian Nations (ASEAN) |access-date=19 April 2024 |page=9 |date=2014}}</ref>

Today, about 90% of non-[[bulk cargo]] worldwide is transported by container by about 50,000 container ships.<ref>{{cite news |title=Shipping Contributes Heavily to Climate Change. Are Green Ships the Solution? |url=https://www.nytimes.com/2023/10/30/business/economy/shipping-climate-change-green-fuel.html |work=New York Times|access-date=19 April 2024 |date=2023-10-30}}</ref> Modern container ships can carry over 24,000 TEU. The largest container ships measure about {{convert|400|m|ft}} in length, and carry loads equal to the cargo-carrying capacity of sixteen to seventeen pre-World War II freighter ships.<ref>{{cite book |last1=Olsen |first1=Alexander Arnfinn |title=Merchant Ship Types |date=2023 |publisher=Routledge |location=New York, NY |isbn=978-1-032-37876-3 |edition=1st |page=Table 2.1|url=https://books.google.com/books?id=F4ynEAAAQBAJ&pg=PT73 |access-date=19 April 2024}}</ref>

==Architecture==
There are several key points in the design of modern container ships.  The hull, similar to that of bulk carriers and general cargo ships, is built around a strong [[keel]].<ref name="hay-kee-15-2">Hayler & Keever, 2004, p. 15-2.</ref>  Into this frame is set one or more below-deck cargo [[Hold (ship)|holds]], numerous tanks, and the [[engine room]].  The holds are topped by hatch covers, onto which more containers can be stacked.  Many container ships have cargo cranes installed on them, and some have specialized systems for securing containers on board.

The hull of a modern cargo ship is a complex arrangement of steel plates and strengthening beams.  Resembling ribs, and fastened at right angles to the keel, are the ship's frames.<ref name="hay-kee-15-2"/>  The ship's main deck, the metal platework that covers the top of the hull framework, is supported by beams that are attached to the tops of the frames and run the full breadth of the ship.<ref name="hay-kee-15-2"/>  The beams not only support the deck, but along with the deck, frames, and transverse bulkheads, strengthen and reinforce the shell.<ref name="hay-kee-15-2"/>  Another feature of recent hulls is a set of double-bottom tanks, which provide a second watertight shell that runs most of the length of a ship.<ref name="hay-kee-15-3">Hayler & Keever, 2004, p. 15-3.</ref>  The double-bottoms generally hold liquids such as fuel oil, ballast water or fresh water.<ref name="hay-kee-15-3"/>

A ship's engine room houses its main engines and auxiliary machinery such as the fresh water and sewage systems, electrical generators, fire pumps, and air conditioners.<ref name="hay-kee-15-3"/>  In most new ships, the engine room is located in the aft portion.<ref name="hay-kee-15-3"/><!--there's a bit more on 15-5, but it doesn't seem that important at the moment -->

=== Size categories ===
[[File:20240330 Container ship sizes and capacities.svg|thumb|The size of the ''[[MV Dali]]'', involved in the 2024 [[Francis Scott Key Bridge collapse]], though considered large, is less than that of the largest container ship.<ref name=NYTimes_20240328/> It is recognized that bigger ships can cause bigger disasters, such as the 1,300-foot vessel in the [[2021 Suez Canal obstruction]].<ref name=NYTimes_20240328>{{cite news |last1=Koeze |first1=Ella |title=The Dali Is a Big Ship. But Not the Biggest. |url=https://www.nytimes.com/interactive/2024/03/28/business/economy/big-ship-dali-baltimore.html |work=The New York Times |date=March 28, 2024 |archive-url=https://web.archive.org/web/20240330113653/https://www.nytimes.com/interactive/2024/03/28/business/economy/big-ship-dali-baltimore.html |archive-date=March 30, 2024 |url-status=live }} Source credits: "Sources: "The Geography of Transport Systems," by Jean-Paul Rodrigue; VesselFinder; the Empire State Building; the Eiffel Tower; ShipHub; Maryland Port Administration".</ref>]]
Container ships are distinguished into 7 major size categories: small feeder, feeder, feedermax, [[Panamax]], [[Post-Panamax]], [[Neopanamax]] and ultra-large.<ref name="man"/> As of December 2012, there were 161 container ships in the VLCS class (Very Large Container Ships, more than 10,000 TEU), and 51 ports in the world can accommodate them.<ref>Vesterager, Jacob. "[http://shippingwatch.dk/Havne/article4943407.ece Alphaliner: Verdens havne er ikke klar til gigantskibe]" (World ports not ready for giant ships). ShippingWatch, December 2012.</ref>

The size of a Panamax vessel is limited by the original [[Panama Canal Locks|Panama canal's lock chambers]], which can accommodate ships with a beam of up to 32.31&nbsp;m, a length overall of up to 294.13&nbsp;m, and a draft of up to 12.04&nbsp;m.<ref>Autoridad del Canal de Panamá 2005, pp. 11{{spaced ndash}}12.</ref>  The Post-Panamax category has historically been used to describe ships with a moulded breadth over 32.31&nbsp;m,<ref name="unctad-xiii">UNCTAD, 2010, p. xiii.</ref> however the [[Panama Canal expansion project]] has caused some changes in terminology.  The Neopanamax category is based on the maximum vessel size that is able to transit a new third set of locks, which opened in June 2016.<ref name=NYT062016>{{cite news | url=https://www.nytimes.com/aponline/2016/06/26/world/americas/ap-lt-panama-canal-expansion.html?ref=world&_r=0 | title=Panama Canal Opens $5B Locks, Bullish Despite Shipping Woes | author=The Associated Press | work=[[The New York Times]] | date=2016-06-26 | access-date=2016-06-26| author-link=The Associated Press }}</ref><ref name="pc-np"/> The third set of locks were built to accommodate a container ship with a [[length overall]] of {{convert|366|m}}, a maximum beam (width) of {{convert|49|m}}, and tropical fresh-water draft of {{convert|15.2|m}}.<ref name="pc-np">Autoridad del Canal de Panamá, 2009.</ref><ref name="pc45">Autoridad del Canal de Panamá, 2006, p. 45.</ref> Such a vessel, called Neopanamax class, is wide enough to carry 19 columns of containers, can have a total capacity of approximately 12,000 TEU and is comparable in size to a [[capesize]] bulk carrier or a [[Suezmax]] tanker.<ref name="pc45"/>

Container ships under 3,000 TEU are generally called [[feeder ship]]s or feeders.  They are small ships that typically operate between smaller container ports.  Some feeders collect their cargo from small ports, drop it off at large ports for transshipment on larger ships, and distribute containers from the large port to smaller regional ports.<ref name="mcnich-45">McNicholas, p. 45.</ref>  This size of vessel is the most likely to carry cargo cranes on board.<ref name="unctad32"/>

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{| class="wikitable plainrowheaders"
|+ Container ship size categories
! Name
! Capacity<br />([[Twenty-foot equivalent unit|TEU]])<ref name="man">MAN Diesel, 2009, p.6.</ref>
! [[Length overall|Length]]
! [[Beam (nautical)|Beam]]
! [[Draft (hull)|Draft]]
! colspan="2" | Example
|-
|Ultra Large Container Vessel (ULCV)
|14,501 and higher
|{{convert|1200|ft|m|0|abbr=on}} and longer
|{{convert|160.7|ft|m|0|abbr=on}} and wider
|{{convert|49.9|ft|m|1|abbr=on}} and deeper
| With a length of 400 m, a beam of 59 m, draft of 14.5 m, and a capacity of 18,270 TEU, ships of the [[Maersk Triple E class]] are able to transit the Suez canal.<ref>{{csr|register=ABS|id=13232687|shipname=Mærsk Mc-Kinney Møller|access-date=1 May 2014}}<br />{{cite book|last1=van Ham|first1=Hans|last2=Rijsenbrij|first2=Joan Rijsenbrij|title=Development of containerization success through vision, drive and technology|date=2012|publisher=IOS Press|location=Amsterdam|isbn=9781614991472|page=290|url=https://books.google.com/books?id=CgQmkTczzPwC&q=%22draft%22+%22triple+e%22+14.5&pg=PA290|edition=Online-Ausg.}}</ref><br>Photo: [[Mærsk Mc-Kinney Møller (ship)|MV ''Mærsk Mc-Kinney Møller'']]
| [[File:Mærsk Mc-Kinney Møller passing Port Said in the Suez Canal on its maiden voyage.jpg|150px]]
|-
|[[New Panamax]] (or Neopanamax)
|10,000–14,500
| rowspan="2" | {{convert|1200|ft|m|0|abbr=on}}
| rowspan="2" | {{convert|160.7|ft|m|0|abbr=on}}
| rowspan="2" | {{convert|49.9|ft|m|1|abbr=on}}
| rowspan="2" | With a beam of 43 m, ships of the ''COSCO Guangzhou'' class are much too big to fit through the Panama Canal's old locks, but could easily fit through the new expansion.<br>Photo:  The 9,500 TEU {{MV|COSCO Guangzhou}} pierside in Hamburg
| rowspan="2" | [[File:COSCO Guangzhou 02 (RaBoe).jpg|150px]]
|-
|[[Post-Panamax]]
|5,101–10,000
|-
|[[Panamax]]
|3,001–5,100
| {{convert|965|ft|m|2|abbr=on}}<br>
| {{convert|106|ft|m|2|abbr=on}}
| {{convert|39.5|ft|m|2|abbr=on}}
|Ships of the Bay class are at the upper limit of the Panamax class, with an overall length of 292.15 m, beam of 32.2m, and maximum depth of 13.3 m.<ref>{{cite web|url=http://www.reedereibluestar.de/fleet/fleet-list/bay-class-overview.html |title=Bay Class Overview |author=Reederei Blue Star GmbH |author-link=Reederei Blue Star GmbH |year=2011 |work=Reederei Blue Star Fleet |publisher=Reederei Blue Star GmbH |location=Hamburg |access-date=2011-03-05 |url-status=dead |archive-url=https://web.archive.org/web/20110719074522/http://www.reedereibluestar.de/fleet/fleet-list/bay-class-overview.html |archive-date=July 19, 2011 }}</ref><br>Photo: The 4,224 TEU MV ''Providence Bay'' passing through the Panama Canal
|[[File:Panama Kanal 01 (40).jpg|150px]]
|-
|Feedermax
|2,001–3,000
| rowspan="3" |
| rowspan="3" |
| rowspan="3" |
| rowspan="3" | Container ships under 3,000 TEU are typically called feeders. In some areas of the world, they might be outfitted with cargo cranes.<br>Photo: The 384 TEU {{MV|TransAtlantic}} at anchor<ref name="fearnleys">{{cite web |url=http://www.fearnsale.com/asset/68/1/68_1.pdf |title= Fearnley's Annual Review, 2004|access-date=2011-03-05 |author=Fearnresearch|year=2005 |publisher=Fearnleys AS|location=Oslo|page=90}}</ref>
| rowspan="3" | [[File:MV TransAtlantic.jpg|150px]]
|-
|[[Feeder ship|Feeder]]
|1,001–2,000
|-
|Small feeder
|Up to 1,000
|}

===Cargo cranes===
{{see also|Lift-on/lift-off}}
[[File:US Navy 110303-M-0074F-169 A crane offloads a beach landing module from USNS Sgt. William Button (T-AK 3012) near Camp Pendleton, Calif., during Pa.jpg|thumb|Cargo cranes on a US navy container ship]]

A major characteristic of a container ship is whether it has cranes installed for handling its cargo.  Those that have cargo cranes are called ''geared'' and those that do not are called ''ungeared'' or ''gearless''.  The earliest purpose-built container ships in the 1970s were all gearless.<ref name="unctad32">UNCTAD, 2010, p. 32.</ref>  Since then, the percentage of geared newbuilds has fluctuated widely, but has been decreasing overall, with only 7.5% of the container ship capacity in 2009 being equipped with cranes.<ref name="unctad32"/>

While geared container ships are more flexible in that they can visit ports that are not equipped with pierside [[container crane]]s, they suffer from several drawbacks.<ref name="unctad32"/>  To begin with, geared ships will cost more to purchase than a gearless ship.<ref name="unctad32"/>  Geared ships also incur greater recurring expenses, such as maintenance and fuel costs.<ref name="unctad32"/>  The United Nations Council on Trade and Development characterizes geared ships as a "niche market only appropriate for those ports where low cargo volumes do not justify investment in port cranes or where the public sector does not have the financial resources for such investment".<ref name="unctad32"/>

Instead of the rotary cranes, some geared ships have [[gantry crane]]s installed.<ref name="con249">Conrad, 1989, p. 249.</ref>  These cranes, specialized for container work, are able to roll forward and aft on rails.<ref name="con249"/>  In addition to the additional capital expense and maintenance costs, these cranes generally load and discharge containers much more slowly than their shoreside counterparts.<ref name="con249"/>

The introduction and improvement of shoreside [[container crane]]s have been a key to the success of the container ship.<ref name="con249"/>  The first crane that was specifically designed for container work was built in California's Port of Alameda in 1959.<ref name="con249"/>  By the 1980s, shoreside gantry cranes were capable of moving containers on a 3-minute-cycle, or up to 400 tons per hour.<ref name="con249"/> In March 2010, at [[Port Klang]] in Malaysia, a new world record was set when 734 container moves were made in a single hour.<ref name="unctad100">UNCTAD, 2010, p. 100.</ref> The record was achieved using 9 cranes to simultaneously load and unload {{MV|CSCL Pusan}}, a ship with a capacity of 9,600 TEU.<ref name="unctad100"/>

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.<ref name="unctad32"/>  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.<ref name="unctad32"/>

[[File:Containerladeräume Schiff retouched.jpg|thumb|A view into the holds of a container ship. The vertical cell guides organize containers [[athwartships]].]]

===Cargo holds===
Efficiency has always been key in the design of container ships.<ref name="meurn-1-16">Meurn & Sauerbier, 2004, pp. 1–16.</ref>  While containers may be carried on conventional break-bulk ships, cargo holds for dedicated container ships are specially constructed to speed loading and unloading, and to efficiently keep containers secure while at sea.<ref name="meurn-1-16"/>  A key aspect of container ship specialization is the design of the hatches, the openings from the main deck to the cargo holds.<ref name="haykey5-10">Hayler & Keever, 2004, pp. 5–10.</ref>  The hatch openings stretch the entire breadth of the cargo holds, and are surrounded by a raised steel structure known as the ''hatch [[coaming]]''.<ref name="meurn-1-16"/><ref name="haykey5-10"/>  On top of the hatch coamings are the hatch covers.  Until the 1950s, hatches were typically secured with wooden boards and tarpaulins held down with battens.<ref name="haykey5-9-5-10">Hayler & Keever, 2004, pp. 5-9 – 5-10.</ref>  Today, some hatch covers can be solid metal plates that are lifted on and off the ship by cranes, while others are articulated mechanisms that are opened and closed using powerful hydraulic rams.

Another key component of dedicated container-ship design is the use of ''cell guides''.<ref name="meurn-1-16"/>  Cell guides are strong vertical structures constructed of metal installed into a ship's cargo holds.<ref name="meurn-1-16"/>  These structures guide containers into well-defined rows during loading and provide some support for containers against the ship's rolling at sea.<ref name="meurn-1-16"/>  So fundamental to container ship design are cell guides that organizations such as the [[United Nations Conference on Trade and Development]] use their presence to distinguish dedicated container ships from general break-bulk cargo ships.<ref name="unctad-xiii"/>

A system of three dimensions is used in [[Stowage plan for container ships|cargo plans]] to describe the position of a container aboard the ship.<ref name="meurn-1-19-21">Meurn & Sauerbier, 2004, p. 1-19–1-21.</ref>  The first coordinate is the ''bay'', which starts at the front of the ship and increases aft.<ref name="meurn-1-19-21"/>  The second coordinate is the ''row''.<ref name="meurn-1-19-21"/>  Rows on the starboard side are given odd numbers and those on the port side are given even numbers.<ref name="meurn-1-19-21"/>  The rows nearest the centerline are given low numbers, and the numbers increase for slots further from the centerline.<ref name="meurn-1-19-21"/> The third coordinate is the ''tier'', with the first tier at the bottom of the cargo holds, the second tier on top of that, and so forth.<ref name="meurn-1-19-21"/>

Container ships typically take 20 foot and 40 foot containers. Some ships can take 45 footers above deck.  A few ships (APL since 2007,<ref>{{cite web | url = https://www.marinelink.com/news/oceancapable-containers315927 | title = APL to Take Delivery of First 'Ocean-capable' 53-foot Containers  | website = www.marinelink.com  | date = 31 October 2007 | access-date = 26 March 2024}}</ref> Carrier53 since 2022 <ref>{{cite web | url = https://www.carrier53.com | title = Tailor made dedicated 53FT shipping service | website = www.carrier53.com  | access-date = 26 March 2024}}</ref>) can carry 53 foot containers. 40 foot containers are the primary container size, making up about 90% of all container shipping and since container shipping moves 90% of the world's freight, over 80% of the world's freight moves via 40 foot containers.

===Lashing systems===
[[File:Manual twistlock.jpg|thumb|right|Twist-locks and lashing rods (''pictured'') are widely used to secure containers aboard ships.]]

Numerous systems are used to secure containers aboard ships, depending on factors such as the type of ship, the type of container, and the location of the container.<ref name="meurn-1-35">Meurn and Sauerbier, 2006, p. 1-35.</ref><ref name="peck and hale">Peck and Hale, 2000, p. 1-4.</ref>  Stowage inside the holds of fully cellular (FC) ships is simplest, typically using simple metal forms called container guides, locating cones, and anti-rack spacers to lock the containers together.<ref name="peckhale2">Peck and Hale, 2000, p. 2.</ref>  Above-decks, without the extra support of the cell guides, more complicated equipment is used.<ref name="meurn-1-35"/>  Three types of systems are currently in wide use: lashing systems, locking systems, and buttress systems.<ref name="meurn-1-35"/>  Lashing systems secure containers to the ship using devices made from wire rope, rigid rods, or chains and devices to tension the lashings, such as turnbuckles.<ref name="meurn-1-35"/>  The effectiveness of lashings is increased by securing containers to each other, either by simple metal forms (such as stacking cones) or more complicated devices such as twist-lock stackers.<ref name="meurn-1-35"/>  A typical [[twist-lock]] is inserted into the casting hole of one container and rotated to hold it in place, then another container is lowered on top of it.<ref name="peckhale12">Peck and Hale, 2000, p. 12.</ref>  The two containers are locked together by twisting the device's handle.<ref name="peckhale12"/>  A typical [[twist-lock]] is constructed of forged steel and ductile iron and has a shear strength of 48 tonnes.<ref name="peckhale10">Peck and Hale, 2000, p. 10.</ref>

The buttress system, used on some large container ships, uses a system of large towers attached to the ship at both ends of each cargo hold.<ref name="meurn-1-38-0">Meurn and Sauerbier, 2006, p. 1-38–1-40.</ref>  As the ship is loaded, a rigid, removable stacking frame is added, structurally securing each tier of containers together.<ref name="meurn-1-38-0"/>

===Bridge===
Container ships have typically had a single bridge and accommodation unit towards the rear, but to reconcile demand for larger container capacity with [[SOLAS Convention|SOLAS]] visibility requirements, several new designs have been developed. {{As of|2015}}, some large container ships are being developed with the bridge further forward, separate from the exhaust stack. Some smaller container ships working in European ports and rivers have liftable wheelhouses, which can be lowered to pass under low bridges.

==Fleet characteristics==
{| class="toccolours" style="float:right; margin-left: 1em; margin-bottom: 1em; font-size: 85%;"
|+<big>'''Largest container ship operators, 2022'''</big><ref>{{Cite web|title=PublicTop100|url=https://alphaliner.axsmarine.com/PublicTop100/|access-date=2021-04-14|website=alphaliner.axsmarine.com}}</ref>
|-
|
# [[Mediterranean Shipping Company|MSC]] – Switzerland / Italy
# [[Maersk Line]] – Denmark
# [[CMA CGM]] – France
# [[COSCO Shipping Lines|COSCO]] – China
# [[Hapag-Lloyd]] – Germany
# [[Evergreen Marine Corporation|Evergreen]] – Taiwan
# [[Ocean Network Express|ONE]] – Japan
# [[HMM (company)|HMM]]  – South Korea
# [[Yang Ming Marine Transport Corporation|Yang Ming]] – Taiwan
# [[ZIM (shipping company)|ZIM]] – Israel
|}
{{bar box
|title=Fleet capacity, April 02, 2023<ref>{{Cite web|url=https://alphaliner.axsmarine.com/PublicTop100/|title=PublicTop100|website=alphaliner.axsmarine.com|access-date=2022-04-14}}</ref>
|titlebar=#DDD
|left1=fleet
|right2=TEU
|float=right
|width=200px
|bars=
{{bar pixel|MSC|gold|48|32709}}
{{bar pixel|Maersk|lightblue|41|85693}}
{{bar pixel|CMA CGM|darkblue|34|09776}}
{{bar pixel|COSCO|dodgerblue|28|86908}}
{{bar pixel|Hapag-Lloyd|darkorange|17|98866}}
{{bar pixel|Evergreen|darkgreen|16|68555}}
{{bar pixel|ONE|deeppink|15|34426}}
{{bar pixel|HMM|red|8|16365}}
{{bar pixel|Yang Ming|gray|7|05614}}
{{bar pixel|ZIM|brown|5|66935}}
}}
{{bar box
|title=Worldwide capacity<ref>{{cite news|title=World container-fleet capacity has grown by 50 percent since 2008|url=http://www.progressive-economy.org/trade_facts/world-container-fleet-capacity-has-grown-by-50-percent-since-2008/|access-date=30 June 2015|work=Progressive Economy|date=12 December 2012}}</ref><ref>{{Cite web|url=https://www.statista.com/statistics/198391/number-of-teus-of-the-global-containership-fleet/|title=Global containership fleet - TEUs 2017 {{!}} Statistic|website=Statista|language=en|access-date=2018-02-23}}</ref>
|titlebar=#DDD
|left1=year
|right2=million TEU
|float=right
|width=200px
|bars=
{{bar pixel|1990|red|1.5}}
{{bar pixel|2000|green|4.3}}
{{bar pixel|2008|blue|10.6}}
{{bar pixel|2012|orange|15.4}}
{{bar pixel|2017|magenta|20.3}}
}}

{{as of|2010}}, container ships made up 13.3% of the world's fleet in terms of deadweight tonnage.<ref name="unctad30">UNCTAD 2010, p. 30.</ref>  The world's total of container ship deadweight tonnage has increased from {{DWT|11 million}} in 1980 to {{DWT|169.0 million}} in 2010.<ref name="unctad31">UNCTAD 2010, p. 31.</ref>  The combined deadweight tonnage of container ships and general cargo ships, which also often carry containers, represents 21.8% of the world's fleet.<ref name="unctad19">UNCTAD 2006, p. 19.</ref>

{{As of|2009}}, the average age of container ships worldwide was 10.6 years, making them the youngest general vessel type, followed by [[bulk carrier]]s at 16.6 years, [[oil tanker]]s at 17 years, general cargo ships at 24.6 years, and others at 25.3 years.<ref name="unctad34">UNCTAD 2010, p. 34.</ref>

Most of the world's carrying capacity in fully cellular container ships is in the [[cargo liner|liner service]], where ships trade on scheduled routes.<ref name="unctad32" /><ref name="unctad85">UNCTAD, 2010, pp. 85.</ref>  As of January 2010, the top 20 liner companies controlled 67.5% of the world's fully cellular container capacity, with 2,673 vessels of an average capacity of 3,774 TEU.<ref name="unctad33" />  The remaining 6,862 fully cellular ships have an average capacity of 709 TEU each.<ref name="unctad33"/>

The vast majority of the capacity of fully cellular container ships used in the liner trade is owned by German [[shipowner]]s, with approximately 75% owned by Hamburg brokers.<ref name="unctad85"/>  It is a common practice for the large container lines to supplement their own ships with chartered-in ships, for example in 2009, 48.9% of the tonnage of the top 20 liner companies was chartered-in in this manner.<ref name="unctad85"/>

===Flag states===
International law requires that every merchant ship be registered in a country, called its [[flag state]].<ref name="icftu7">ICFTU et al., 2002, p. 7.</ref>  A ship's flag state exercises regulatory control over the vessel and is required to inspect it regularly, certify the ship's equipment and crew, and issue safety and pollution prevention documents.  {{as of|2006}}, the United States [[Bureau of Transportation Statistics]] count 2,837&nbsp;container ships of {{DWT|10,000|long|disp=long}} or greater worldwide.<ref name="bts">Bureau of Transportation Statistics, 2007, p. 80.</ref> [[Panama]] was the world's largest [[flag state]] for container ships, with 541 of the vessels in its registry.<ref name="bts"/>  Seven other flag states had more than 100 registered container ships: [[Liberia]] (415), [[Germany]] (248), [[Singapore]] (177), [[Cyprus]] (139), the [[Marshall Islands]] (118) and the [[United Kingdom]] (104).<ref name="bts"/>  The Panamanian, Liberian, and Marshallese flags are open registries and considered by the [[International Transport Workers' Federation]] to be [[flags of convenience]].<ref name="itf-list">{{cite web|url=http://www.itfglobal.org/flags-convenience/flags-convenien-183.cfm |title=FOC Countries |publisher=International Transport Workers' Federation |date=2005-06-06 |access-date=2010-07-02 |url-status=dead |archive-url=https://web.archive.org/web/20100718210353/http://www.itfglobal.org/flags-convenience/flags-convenien-183.cfm |archive-date=2010-07-18 }}</ref>  By way of comparison, traditional maritime nations such as the United States and Japan only had 75 and 11 registered container ships, respectively.<ref name="bts"/>

===Vessel purchases===
{{update section|date=January 2018}}
[[File:Container-ship-prices.svg|thumb|right|300px]]

In recent years, oversupply of container ship capacity has caused prices for new and used ships to fall.  From 2008 to 2009, new container ship prices dropped by 19–33%, while prices for 10-year-old container ships dropped by 47–69%.<ref name="unctad5357">UNCTAD 2010, p. 53, 57.</ref>  In March 2010, the average price for a geared 500-TEU container ship was $10 million, while gearless ships of 6,500 and 12,000 TEU averaged prices of $74 million and $105 million respectively.<ref name="unctad56">UNCTAD 2010, p. 56.</ref>  At the same time, secondhand prices for 10-year-old geared container ships of 500-, 2,500-, and 3,500-TEU capacity averaged prices of $4 million, $15 million, and $18 million respectively.<ref name="unctad57">UNCTAD 2010, p. 57.</ref>

In 2009, 11,669,000 gross tons of newly built container ships were delivered.<ref name="unctad50">UNCTAD 2010, p. 50.</ref>  Over 85% of this new capacity was built in the Republic of Korea, China, and Japan, with Korea accounting for over 57% of the world's total alone.<ref name="unctad50"/>  New container ships accounted for 15% of the total new tonnage that year, behind bulk carriers at 28.9% and oil tankers at 22.6%.<ref name="unctad50"/>

===Scrapping===
Most ships are removed from the fleet through a process known as [[ship breaking|scrapping]].<ref name="ilo-breaking">{{cite web |url=http://www.ilo.org/public/english/dialogue/sector/papers/shpbreak/index.htm |title=Is there a decent way to break up ships? |access-date=2007-05-29 |last=Bailey |first=Paul J. |year=2000 |work=Sectoral Activities Programme |publisher=International Labour Organization }}</ref>  Scrapping is rare for ships under 18 years old and common for those over 40 years in age.<ref name="unctad35">UNCTAD, 2010, p. 35.</ref>  Ship-owners and buyers negotiate scrap prices based on factors such as the ship's empty weight (called light ton displacement or LTD) and prices in the scrap metal market.<ref name="mtcp">{{cite book | author = Maritime Transport Coordination Platform | title = Tonnage Measurement Study | chapter-url = http://ec.europa.eu/transport/maritime/studies/doc/2006_11_tonnage_measurement_study.pdf | access-date = 2007-05-29 | series = MTCP Work Package 2.1, Quality and Efficiency | date = November 2006 | location = Bremen/Brussels | pages = 3.3 | chapter = 3: The London Tonnage Convention | url-status = dead | archive-url = https://web.archive.org/web/20070330134300/http://ec.europa.eu/transport/maritime/studies/doc/2006_11_tonnage_measurement_study.pdf | archive-date = 2007-03-30 }}</ref>  Scrapping rates are volatile, the price per light ton displacement has swung from a high of $650 per LTD in mid-2008 to $200 per LTD in early 2009, before building to $400 per LTD in March 2010.<ref name="unctad51">UNCTAD 2010, p. 51.</ref>  {{As of|2009}}, over 96% of the world's scrapping activity takes place in China, India, Bangladesh, and Pakistan.<ref name="unctad53">UNCTAD 2010, p. 53.</ref>

The global economic downturn of 2008–2009 resulted in more ships than usual being sold for scrap.<ref name="unctad51"/>  In 2009, 364,300 TEU worth of container ship capacity was scrapped, up from 99,900 TEU in 2008.<ref name="unctad51"/>  Container ships accounted for 22.6% of the total gross tonnage of ships scrapped that year.<ref name="unctad52">UNCTAD 2010, p. 52.</ref>  Despite the surge, the capacity removed from the fleet only accounted for 3% of the world's container ship capacity.<ref name="unctad51"/>  The average age of container ships scrapped in 2009 was 27.0 years.<ref name="unctad52"/>

===Largest ships===
{{Main|List of largest container ships}}
{| class="wikitable"
|+ 15 largest container ship classes, listed by [[Twenty-foot equivalent unit|TEU capacity]] 
! Built
! Name
! Class<br />size
! Maximum [[Twenty-foot equivalent unit|TEU]]
! Sources
|-
|2023
|''[[Mediterranean Shipping Company|MSC Irina]]''
|6
|24,346
|<ref name=ajot>{{Cite web|url=https://www.ajot.com/news/msc-vessel-irina-is-the-worlds-largest-container-ship|title=MSC vessel "Irina" is the world's largest container ship|website=ajot.com|publisher=American Journal of Transportation|language=en-US|access-date=2024-04-18}}</ref>
|-
|2023
|OOCL Spain
|8
|24,188
|<ref>{{cite web |title=OOCL Kicks Off New Generation of Ultra-Large Boxships |url=https://maritime-executive.com/article/oocl-kicks-off-new-generation-of-ultra-large-boxships |website=Maritime Executive |access-date=20 April 2024}}</ref>
|-
|2023
|ONE Innovation
|6
|24,136
|<ref name="MarExec" />
|-
|2023
|''[[Mediterranean Shipping Company|MSC Tessa]]''
|8
|24,116
|<ref name="InEng" />
|-
|2021
|''[[Evergreen A-class container ship|Ever Ace]]''
|6
|23,992 
|<ref name=News9>{{cite news |title=Do you know these are the largest cargo ships in the world? |url=https://www.news9live.com/knowledge/list-of-largest-cargo-ships-in-the-world-2480088 |access-date=20 April 2024 |work=news9live.com |publisher=News9 Live |date=2024-03-27}}</ref>
|-
|2020
|''[[Algeciras-class container ship|HMM Algeciras]]''
|7
|23,964 
|<ref name=News9/>
|-
|2020
|''[[Algeciras-class container ship|HMM Oslo]]''
|5
|23,792 
|<ref>{{cite web |title=Inaugural stopover of the mega container ship HMM OSLO at the Port of Le Havre |url=https://www.ajot.com/news/inaugural-stopover-of-the-mega-container-ship-hmm-oslo-at-the-port-of-le-havre |website=ajot.com |publisher=American Journal of Transportation |access-date=20 April 2024}}</ref>
|-
|2019
|''[[Gülsün-class container ship|MSC Gülsün]]''
|6
|23,756 
|<ref name=News9/>
|-
|2019
|''[[Mediterranean Shipping Company|MSC Mina]]''
|10
|23,656 
|<ref>{{cite news |title=MSC MINA, one of the world's largest container ships, docks at King Abdullah Port |url=https://www.hellenicshippingnews.com/msc-mina-one-of-the-worlds-largest-container-ships-docks-at-king-abdullah-port/ |access-date=20 April 2024 |work=Hellenic Shipping News}}</ref>
|-
|2020
|''[[Jacques Saadé-class container ship|CMA CGM Jacques Saadé]]''
|9
|23,112 
|<ref>{{cite news |title=World's largest gas-powered container ship rolls off Shanghai slipway, a milestone for global shipping and China's shipbuilding |url=https://www.scmp.com/business/companies/article/3030497/worlds-largest-gas-powered-container-ship-rolls-shanghai-slipway |access-date=20 April 2024 |work=SCMP}}</ref>
|-
|2017
|''[[OOCL Hong Kong]]''
|6
|21,413 
|<ref>{{Cite news |url=http://www.marineinsight.com/shipping-news/new-largest-containership-world-oocl-hong-kong-christened/ |title=New Largest Containership In The World 'OOCL Hong Kong' Christened haul |access-date=28 July 2017 |archive-date=9 March 2020 |archive-url=https://web.archive.org/web/20200309015811/https://www.marineinsight.com/shipping-news/new-largest-containership-world-oocl-hong-kong-christened/ |url-status=dead }}</ref>
|-
|2018
|''[[Universe-class container ship|COSCO Shipping Universe]]''
|6
|21,237
|<ref>{{Cite web|url=https://www.hellenicshippingnews.com/chinas-largest-cargo-ship-handed-over-to-owners/|title=China's largest cargo ship handed over to owners {{!}} Hellenic Shipping News Worldwide|website=www.hellenicshippingnews.com|language=en-US|access-date=2018-06-14|archive-date=2020-02-26|archive-url=https://web.archive.org/web/20200226085139/https://www.hellenicshippingnews.com/chinas-largest-cargo-ship-handed-over-to-owners/|url-status=dead}}</ref>
|-
|2018
|''[[CMA CGM Antoine de Saint Exupery]]''
|3
|20,954 
|<ref>{{Cite web|url=http://www.cma-cgm.com/the-group/activities/shipping/vessel/9776418/cma-cgm-antoine-de-saint-exupery|title=CMA CGM ANTOINE DE SAINT EXUPERY|website=www.cma-cgm.com|language=en|access-date=2018-02-02}}</ref>
|-
|2017
|''[[Madrid Mærsk]]''
|11
|20,568
|<ref>{{Cite press release|url=http://www.maersk.com/en/hardware/2017/05/ships-for-the-long-and-short-haul |title=Ships for the long (and short) haul |work=John Churchill, AP Moller-Maersk |access-date=2017-05-11 |url-status=bot: unknown |archive-url=https://web.archive.org/web/20170505183559/http://www.maersk.com/en/hardware/2017/05/ships-for-the-long-and-short-haul |archive-date=2017-05-05 }}</ref>
|-
|2017
|''[[Triumph-class container ship|MOL Truth]]''
|2
|20,182
|<ref>{{Cite news|url=http://www.mol.co.jp/en/pr/2017/17074.html|title=MOL Truth, Japan's 1st 20,000 TEU Containership, Delivered - Largest Built in Japan, to be Launched on Asia-North Europe Trade -|work=Mitsui O.S.K. Lines|access-date=2018-01-06|language=en}}</ref>
|-
|2017
|''[[MOL Triumph]]''
|4
|20,170
|<ref name="maritime ex1">{{Cite news|url=http://www.maritime-executive.com/article/worlds-largest-container-ship-named|title=World's Largest Container Ship Named|work=The Maritime Executive|access-date=2017-03-18}}</ref>
|-
|2019
|''[[Evergreen G-class container ship|Ever Glory]]''
|4
|20,160
|<ref>{{cite web |title=EVER GLOBE (IMO 9786841) - Container Ship |url=https://www.vesseltracking.net/ship/ever-globe-9786841 |website=Vessel Tracking |access-date=20 April 2024}}</ref>
|-
|2018
|''[[Evergreen G-class container ship|Ever Goods]]''
|7
|20,124
|<ref name="MarIns">{{cite web |title=Top 22 World's Largest Container Ships in 2024 |url=https://www.marineinsight.com/know-more/top-10-worlds-largest-container-ships-in-2019/ |website=Marine Insight |date=11 April 2024 |access-date=20 April 2024}}</ref>
|-
|2018
|''[[Constellation-class container ship|COSCO Shipping Taurus]]''
|5
|20,119
|<ref name="MarIns"/>
|}
{{clear}}

{{More citations needed section|paragraph|date=April 2024}}
[[Economies of scale]] have dictated an upward trend in the size of container ships in order to reduce expenses. However, there are certain limitations to the size of container ships. Primarily, these are the availability of sufficiently large main engines and the availability of a sufficient number of ports and terminals prepared and equipped to handle ultra-large container ships. Furthermore, the permissible maximum ship dimensions in some of the world's main waterways could present an upper limit in terms of vessel growth. This primarily concerns the [[Suez Canal]] and the [[Singapore Strait]].

In 2008 the South Korean shipbuilder [[STX Corporation|STX]] announced plans to construct a container ship capable of carrying {{TEU|22,000}},<ref>{{Cite web | title =STX reveals design for world's largest container ship | publisher =SeaTrade Asia | date =May 2008 | url =http://www.seatradeasia-online.com/News/2668.html | access-date =2008-09-10 | url-status =dead | archive-url =https://web.archive.org/web/20081224171410/http://www.seatradeasia-online.com/News/2668.html | archive-date =2008-12-24 }}</ref> and with a proposed length of {{convert|450|m|ft|abbr=on}} and a [[beam (nautical)|beam]] of {{convert|60|m|ft|abbr=on}}.<ref>{{Cite web| title =STX ponders 20,000 TEU boxship | publisher =Turkish Maritime |date=May 2008 | url =http://www.turkishmaritime.com.tr/news_detail.php?id=859 | access-date =2008-09-10 }}</ref> If constructed, the container ship would become the largest seagoing vessel in the world.<ref>{{Cite news | title =New designs on the world's biggest container ships | work =Shipping Times | publisher =Shipping Times UK | date =2008-05-28 | url =http://www.shippingtimes.co.uk/item_10082.html | access-date =2008-09-10 | archive-date =2020-03-01 | archive-url =https://web.archive.org/web/20200301200847/http://www.shippingtimes.co.uk/item_10082.html | url-status =dead }}</ref>

Since even very large container ships are vessels with relatively low draft compared to large tankers and bulk carriers, there is still considerable room for vessel growth. Compared to today's largest container ships, Maersk Line's {{TEU|15,200}} ''[[Emma Mærsk]]''-type series, a {{TEU|20,000}} container ship would only be moderately larger in terms of exterior dimensions. According to a 2011 estimate, an ultra-large container ship of {{TEU|20,250}} would measure {{convert|440|x|59|m|ft|abbr=on}}, compared to {{convert|397.71|×|56.40|m|ft|abbr=on}} for the ''Emma Mærsk'' class.<ref name="emma-abs">{{csr|register=ABS|id=06151181|shipname=Emma Maersk|access-date=2011-03-13}}</ref><ref name="Alphaliner ULCS">{{Cite web |url=http://www.alphaliner.com/liner2/research_files/Alphaliner-20Kteu-ULCS.pdf |title=Alphaliner |access-date=2018-12-28 |archive-url=https://web.archive.org/web/20110707115945/http://www.alphaliner.com/liner2/research_files/Alphaliner-20Kteu-ULCS.pdf |archive-date=2011-07-07 |url-status=dead }}</ref>  It would have an estimated deadweight of circa 220,000 tons. While such a vessel might be near the upper limit for a Suez Canal passage, the so-called [[Malaccamax]] concept (for [[Straits of Malacca]]) does not apply for container ships, since the Malacca and Singapore Straits' [[draft limit]] of about {{convert|21|m|ft}} is still above that of any conceivable container ship design. In 2011, Maersk announced plans to build a new "[[Maersk Triple E|Triple E]]" family of container ships with a capacity of 18,000 TEU, with an emphasis on lower fuel consumption.<ref>{{cite news|url=https://www.wsj.com/article/BT-CO-20110218-706510.html|access-date=2011-02-22|title=NORDIC ROUNDUP: Maersk Orders 10 Container Carriers - Source - WSJ.com|date=2011-02-22|work=The Wall Street Journal}}{{Dead link|date=January 2019 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>
[[File:EVER GIVEN (49643352087).jpg|thumb|''[[Ever Given]]'' in March 2020 at the ECT Delta terminal in the [[Port of Rotterdam]]]]
In the present market situation, main engines will not be as much of a limiting factor for vessel growth either. The steadily rising expense of [[fuel oil]] in the early 2010s had prompted most container lines to adapt a slower, more economical voyage speed of about 21 knots, compared to earlier top speeds of 25 or more knots. Subsequently, newly built container ships can be fitted with a smaller main engine. Engine types fitted to today's ships of {{TEU|14,000}} are thus sufficiently large to propel future vessels of {{TEU|20,000}} or more. Maersk Line, the world's largest container shipping line, nevertheless opted for twin engines (two smaller engines working two separate propellers), when ordering a series of ten 18,000 TEU vessels from Daewoo Shipbuilding in February 2011.<ref name="Maersk Press Release">{{cite web |url=http://www.maerskline.com/link/?page=news&path=/news/story_page/11/Triple_E |title= Maersk Line shipping containers worldwide|website=www.maerskline.com |archive-url=https://web.archive.org/web/20110714020147/http://www.maerskline.com/link/?page=news&path=%2Fnews%2Fstory_page%2F11%2FTriple_E |archive-date=July 14, 2011}}</ref> The ships were delivered between 2013 and 2014. In 2016, some experts believed that the current largest container ships are at the optimum size, and could not economically be larger, as port facilities would be too expensive, port handling too time consuming, the number of suitable ports too low, and insurance cost too high.<ref>{{Cite web |url=http://www.wirtschaftsrat.de/wirtschaftsrat.nsf/id/wirtschaftsrat-hafen-muss-mega-containerschiffen-angepasst-werden-de |title=Hafen muss Mega-Containerschiffen angepasst werden |access-date=2016-03-14 |archive-date=2020-02-29 |archive-url=https://web.archive.org/web/20200229195055/https://www.wirtschaftsrat.de/wirtschaftsrat.nsf/id/wirtschaftsrat-hafen-muss-mega-containerschiffen-angepasst-werden-de |url-status=dead }}</ref><ref>{{Cite web |url=http://www.wirtschaftsrat.de/wirtschaftsrat.nsf/id/2DFB5BAD4D2963D9C1257F6C002EF097/$file/2016-03-04%20THB_Containerschiffe.pdf |title=Obergrenzen helfen Reedern und Häfen |access-date=2016-03-14 |archive-date=2020-03-15 |archive-url=https://web.archive.org/web/20200315065727/https://www.wirtschaftsrat.de/wirtschaftsrat.nsf/id/2DFB5BAD4D2963D9C1257F6C002EF097/$file/2016-03-04%20THB_Containerschiffe.pdf |url-status=dead }}</ref>

In March 2017 the first ship with an official capacity over 20,000 TEUs was christened at [[Samsung Heavy Industries]]. ''MOL Triumph'' has a capacity of 20,150 TEUs. Samsung Heavy Industries was expected to deliver several ships of over 20,000 TEUs in 2017, and has orders for at least ten vessels in that size range for OOCL and MOL.<ref name="maritime ex1"/>

The world's largest container ship, ''MSC Irina'', was delivered March 9, 2023 by builder Yangzi Xinfu Shipbuilding to the [[Mediterranean Shipping Company]] (MSC), with a capacity of 24,346 TEUs. Measuring 399.99 metres in length and 61.3 metres in beam, the ship is one of four ordered from the builder in 2020,<ref>{{cite web |title=MSC Shatters Records With Delivery Of 24,346TEU MSC Irina |website=Ships Monthly |url= https://shipsmonthly.com/news/msc-shatters-records-with-delivery-of-24346teu-msc-irina/|publisher=Kelsey Media |access-date=19 April 2024}}</ref> and exceeded MSC's 24,116 TEU ''MSC Tessa'', which had been delivered that same day by the [[China State Shipbuilding Corporation]] (CSSC).<ref name="InEng">{{cite web |title=World's largest container ship MSC Tessa delivered, made in China |url=https://interestingengineering.com/transportation/ultra-large-container-msc-tessa-delivered |website=Interesting Engineering |access-date=19 April 2024}}</ref> In April, ''MSC Irina'' sister ship ''MSC Loreto'', with an equal capacity of 24,346 TEU was received by MSC.<ref name=Offshore>{{cite web |title=Europe sets its gaze on the world's largest ship: A closer look at MSC Loreto |url=https://www.offshore-energy.biz/europe-sets-its-gaze-on-the-worlds-largest-ship-a-closer-look-at-msc-loreto/ |website=Offshore Energy |date=26 May 2023 |access-date=20 April 2024}}</ref>

On June 2, 2023 [[Ocean Network Express]] took delivery of the ''ONE Innovation'' with a capacity of 24,136 TEUs. ''ONE Innovation'' is one of six new Megamax vessels ordered by Ocean Network Express in December 2020 to be built by a consortium of [[Imabari Shipbuilding]] and [[Japan Marine United]].<ref name=MarExec>{{Cite web |title=ONE Plans Six World's Largest Containerships |url=https://maritime-executive.com/article/one-plans-six-world-s-largest-containerships |date=December 24, 2020 |access-date=2024-01-31 |website=The Maritime Executive |language=en}}</ref>

===Freight market===
The act of hiring a ship to carry cargo is called chartering. Outside special [[bulk cargo]] markets, ships are hired by three types of [[Chartering (shipping)|charter]] agreements: the [[voyage charter]], the time charter, and the [[bareboat charter]].<ref name="aramess233">Aragon & Messer, 2001, p. 233.</ref>  In a voyage charter, the charterer rents the vessel from the loading port to the discharge port.<ref name="hub212">Huber 2001, p. 212.</ref>  In a time charter, the vessel is hired for a set period of time, to perform voyages as the charterer directs.<ref name="hub212"/>  In a bareboat charter, the charterer acts as the ship's operator and manager, taking on responsibilities such as providing the crew and maintaining the vessel.<ref name="hub2123">Huber 2001, pp. 212–213.</ref>  The completed chartering contract is known as a [[charter party]].<ref name="hub213">Huber 2001, p. 213.</ref>

The [[United Nations Conference on Trade and Development]] [UNCTAD], tracks in its 2010 ''Review of Maritime Trade''  two aspects of container shipping prices:<ref name="unctad8589">UNCTAD, 2010, pp. 85–89.</ref> The first one is a chartering price, specifically the price to time-charter a 1 TEU slot for 14 tonnes of cargo on a container ship.<ref name="unctad85"/>  The other is the [[freight rate]]; or comprehensive daily cost to deliver one-TEU worth of cargo on a given route.<ref name="unctad85"/><ref name="hub225">Huber 2001, p. 225.</ref>  As a result of the [[late-2000s recession]], both indicators showed sharp drops during 2008–2009, and have shown signs of stabilization since 2010.

UNCTAD uses the [[Hamburg Shipbrokers' Association]] (formally the ''Vereinigung Hamburger Schiffsmakler und Schiffsagenten [[Eingetragener Verein|e. V.]]'' or VHSS for short) as its main industry source for container ship freight prices.<ref name="unctad85"/>  The VHSS maintains a few indices of container ship charter prices.  The oldest, which dates back to 1998, is called the ''Hamburg Index''.<ref name="unctad85"/>  This index considers time-charters on fully cellular container ships controlled by Hamburg brokers.<ref name="unctad85"/>  It is limited to charters of 3 months or more, and presented as the average daily cost in U.S. dollars for a one-TEU slot with a weight of 14 tonnes.<ref name="unctad85"/>  The Hamburg Index data is divided into ten categories based primarily on vessel carrying capacity.<ref name="unctad85"/>  Two additional categories exist for small vessels of under 500 TEU that carry their own cargo cranes.<ref name="unctad85"/>  In 2007, VHSS started another index, the ''New ConTex'' which tracks similar data obtained from an international group of shipbrokers.<ref name="unctad85"/>

The Hamburg Index shows some clear trends in recent chartering markets.  First, rates were generally increasing from 2000 to 2005.  From 2005 to 2008, rates slowly decreased, and in mid-2008 began a "dramatic decline" of approximately 75%, which lasted until rates stabilized in April 2009.<ref name="unctad85"/>  Rates have ranged from $2.70 to $35.40 in this period, with prices generally lower on larger ships.  The most resilient sized vessel in this time period were those from 200 to 300 TEU, a fact that the United Nations Council on Trade and Development attributes to lack of competition in this sector.<ref name="unctad85"/>  Overall, in 2010, these rates rebounded somewhat, but remained at approximately half of their 2008 values.<ref name="unctad85"/>  As of 2011, the index shows signs of recovery for container shipping, and combined with increases in global capacity, indicates a positive outlook for the sector in the near future.<ref name="unctad85"/>

{| class="wikitable" 
|- 
|+ 2008–2009 freight rates in 1000 US$/TEU<ref name="unctad88">UNCTAD, 2010, p. 88.</ref>
|- 
! scope="col" rowspan="2" | From
! scope="col" rowspan="2" | To
! scope="col" colspan="4" | 2008
! scope="col" colspan="4" | 2009
|- 
! Q1
! Q2
! Q3
! Q4
! Q1
! Q2
! Q3
! Q4
|-
|Asia
|U.S.
|1.8
|1.8
|1.9
|1.9
|1.7
|1.4
|1.2
|1.3
|-
|U.S.
|Asia
|0.8
|1.0
|1.2
|1.2
|0.9
|0.8
|0.8
|0.9
|-
|Europe
|Asia
|1.0
|1.1
|1.1
|1.1
|0.9
|0.7
|0.8
|0.9
|-
|Asia
|Europe
|2.0
|1.9
|1.8
|1.6
|1.0
|0.9
|1.0
|1.4
|-
|U.S.
|Europe
|1.3
|1.4
|1.6
|1.7
|1.5
|1.4
|1.4
|1.5
|-
|Europe
|U.S.
|1.6
|1.6
|1.6
|1.6
|1.3
|1.2
|1.1
|1.3
|-
|}
[[File:Container-ship-rates.svg|thumb|upright=1.5|Year-average daily charter rates for a 1-TEU (14-tonne) slot have varied from $2.70 to $35.40 between 2000 and 2010.]]
UNCTAD also tracks container [[freight rate]]s.  Freight rates are expressed as the total price in U.S. dollars for a shipper to transport one TEU worth of cargo along a given route.<ref name="unctad85"/>  Data is given for the three main container liner routes: U.S.-Asia, U.S.-Europe, and Europe-Asia.<ref name="unctad85"/>  Prices are typically different between the two legs of a voyage, for example the Asia-U.S. rates have been significantly higher than the return U.S.-Asia rates in recent years.<ref name="unctad85"/>  Generally, from the fourth quarter of 2008 through the third quarter of 2009, both the volume of container cargo and freight rates have dropped sharply.<ref name="unctad85"/> In 2009, the freight rates on the U.S.–Europe route were sturdiest, while the Asia-U.S. route fell the most.<ref name="unctad85"/>

{| class="wikitable sortable"
|+ Container freight markets and rates<ref>{{cite web |url= http://unctad.org/en/PublicationsLibrary/rmt2015_en.pdf |title= Table 3.1. Container freight markets and rates |work= Review of Maritime Transport |publisher= United Nations conference on trade and development |date= 14 October 2015 |page= 58}}</ref>
! $ per TEU from Shanghai to !! 2009 !! 2010 !! 2011 !! 2012 !! 2013 !! 2014
|-
| United States West Coast
| 1372 || 2308 || 1667 || 2287 || 2033 || 1970
|-
| United States East Coast
| 2367 || 3499 || 3008 || 3416 || 3290 || 3720
|-
| Northern Europe
| 1395 || 1789 || 881 || 1353 || 1084 || 1161
|-
| Mediterranean
| 1397 || 1739 || 973 || 1336 || 1151 || 1253
|-
| South America (Santos)
| 2429 || 2236 || 1483 || 1771 || 1380 || 1103
|-
| South Africa (Durban)
| 1495 || 1481 || 991 || 1047 || 805 || 760
|-
| Singapore
|  || 318 || 210 || 256 || 231 || 233
|-
| East Japan
|  || 316 || 337 || 345 || 346 || 273
|}

Liner companies responded to their overcapacity in several ways.  For example, in early 2009, some container lines dropped their freight rates to zero on the Asia-Europe route, charging shippers only a surcharge to cover operating costs.<ref name="unctad85"/>  They decreased their overcapacity by lowering the ships' speed (a strategy called "[[slow steaming]]") and by laying up ships.<ref name="unctad85"/> Slow steaming increased the length of the Europe-Asia routes to a record high of over 40 days.<ref name="unctad85"/> Another strategy used by some companies was to manipulate the market by publishing notices of rate increases in the press, and when "a notice had been issued by one carrier, other carriers followed suit".<ref name="unctad89">UNCTAD, 2010, p. 89.</ref>

The [[Trans-Siberian Railroad]] (TSR) has recently become a more viable alternative to container ships on the Asia-Europe route.<ref name="unctad89"/>  This railroad can typically deliver containers in 1/3 to 1/2 of the time of a sea voyage, and in late 2009 announced a 20% reduction in its container shipping rates.<ref name="unctad89"/>  With its 2009 rate schedule, the TSR will transport a forty-foot container to Poland from Yokohama for $2,820, or from Pusan for $2,154.<ref name="unctad89"/>

===Shipping industry alliances===
{| class="wikitable sortable plainrowheaders"
|-
|+ Container ship industry [[Business alliance|alliances]]<ref>{{cite news |url= https://www.drewry.co.uk/container-insight-weekly/weekly-feature-articles/ready-to-go |title= Ready to go |date= 12 Mar 2017 |publisher= Drewry Shipping Consultants Limited}}</ref>
|-
! scope="col" | Alliance
! scope="col" | Partners
! scope="col" | Ships
! scope="col" | Weekly services
! scope="col" | Ports
! scope="col" | Port pairs
|-
! scope="row" | Ocean Alliance
| [[CMA CGM]], [[COSCO Shipping Lines]], [[Evergreen Marine Corporation|Evergreen]]
| 323
| 40
| 95
| 1,571
|-
! scope="row" | THE Alliance
| [[Hapag-Lloyd]], [[HMM (company)|HMM Co Ltd.]], [[Ocean Network Express]], [[Yang Ming Marine Transport Corporation|Yang Ming]]
| 241
| 32
| 78
| 1,327
|-
! scope="row" | 2M Alliance
| [[Maersk Line]], [[Mediterranean Shipping Company]]
| 223
| 25
| 76
| 1,152
|}

In an effort to control costs and maximize capacity utilization on ever-larger ships, vessel sharing agreements, co-operative agreements, and slot-exchanges have become a growing feature of the maritime container shipping industry. As of March 2015, 16 of the world's largest container shipping lines had consolidated their routes and services accounting for 95 percent of container cargo volumes moving in the dominant east-west trade routes.<ref>{{cite news|last1=Leach|first1=Peter|title=Shippers, regulators will be watching closely as alliances launch services|url=http://www.joc.com/maritime-news/container-lines/ocean-three/shippers-regulators-will-be-watching-closely-alliances-launch-services_20150107.html|access-date=23 March 2015|agency=JOC.com|date=7 January 2015}}</ref> Carriers remain operationally independent, as they are forbidden by antitrust regulators in multiple jurisdictions from colluding on freight rates or capacity. Similarities can be drawn {{according to whom|date=May 2023}} with [[airline alliance]]s.

In July 2016 the [[European Commission]] reported that it had raised concerns with 14 container shipping carriers regarding their practice of announcing General Rate Increases (GRIs) in a coordinated manner, which potentially conflicted with the EU and [[European Economic Area|EEA]] rules on concerted practices which could distort competition ([[Article 101 of the Treaty on the Functioning of the European Union]]). The shipping companies announced a series of commitments aiming to address the Commission's concerns, which for its part the Commission accepted as "[[legally binding]]" for the period from 2016 to 2019.<ref>European Commission, [https://ec.europa.eu/commission/presscorner/detail/en/ip_16_2446 Antitrust: Commission accepts commitments by container liner shipping companies on price transparency], published 7 July 2016, accessed 9 May 2023</ref> General Rate Increases continue to be published in the industry either annually or sixth-monthly.<ref>Freightos Ltd., [https://www.freightos.com/freight-resources/gri-shipping-increase/ GRI Shipping Increases 2023], ''Freight Term Glossary'', accessed 9 May 2023</ref>

==Container ports==
[[File:CSCL Globe arriving at Felixstowe, United Kingdom.jpg|thumb|250px|''[[CSCL Globe]]'' is one of the largest container ships in the world.]]
{{Further|List of world's busiest container ports}}

Container traffic through a port is often tracked in terms of [[twenty foot equivalent unit]]s or TEU of throughput.<ref name="unctad97">UNCTAD, 2010, p.97.</ref>  {{As of|2019}}, the [[Port of Shanghai]] was the world's busiest container port, with 43,303,000 TEU handled.<ref name=":0">{{Cite web|title=Lloyd's List One Hundred Ports 2020|url=https://lloydslist.maritimeintelligence.informa.com/one-hundred-container-ports-2020|url-status=live|archive-url=https://web.archive.org/web/20200831212331/https://lloydslist.maritimeintelligence.informa.com/one-hundred-container-ports-2020 |archive-date=2020-08-31 }}</ref>

That year, seven of the busiest ten container ports were in the [[People's Republic of China]], with [[Port of Shanghai|Shanghai]] in 1st place, [[Port of Ningbo|Ningbo]] 3rd, [[Port of Shenzhen|Shenzhen]] 4th, [[Port of Guangzhou|Guangzhou]] 5th, [[Port of Qingdao|Qingdao]] 7th, [[Port of Hong Kong|Hong Kong]] 8th and [[Port of Tianjin|Tianjin]] 9th.<ref name=":0" />

Rounding out the top ten ports were [[Port of Singapore|Singapore]] at 2nd, [[Port of Busan|Busan]] in South Korea at 6th and [[Port of Rotterdam|Rotterdam]] in the Netherlands in the 10th position.<ref name=":0" />

In total, the busiest twenty container ports handled 220,905,805 TEU in 2009, almost half of the world's total estimated container traffic that year of 465,597,537 TEU.<ref name="unctad97" />

==Losses and safety problems==
It has been estimated that container ships lose between 2,000<ref name=TTlost>[http://www.ttclub.com/TTCLUB/PubArc.nsf/D5E4C4B3A805731980256792004C617E/02CE747115C182F780256A6500596BF5?OpenDocument Containers Overboard!]{{dead link|date=October 2017|bot=medic}}{{cbignore|bot=medic}} ''[http://www.ttclub.com/ttclub/public.nsf/html/MGRY-6VLER3?OpenDocument TT Club] {{webarchive |url=https://web.archive.org/web/20110304184259/http://www.ttclub.com/ttclub/public.nsf/html/MGRY-6VLER3?OpenDocument |date=March 4, 2011 }}'' (Maritime insurers). Accessed: 26 February 2011.</ref> and 10,000 [[Containerization|containers]] at sea each year,<ref>{{Cite web|url=http://news.nationalgeographic.com/news/2001/06/0619_seacargo.html |archive-url=https://web.archive.org/web/20010703073644/http://news.nationalgeographic.com/news/2001/06/0619_seacargo.html |url-status=dead |archive-date=July 3, 2001 |title=Lost Sea Cargo: Beach Bounty or Junk? |access-date=2008-04-08 |date=19 June 2001 |author=Janice Podsada |publisher=National Geographic News}}</ref> costing $370 million.<ref name=scat>Hauke Kite‐Powell. [http://manati.orbit.nesdis.noaa.gov/SVW_nextgen/QuikSCAT_maritime_report_final.pdf Benefits to maritime commerce from ocean surface vector wind observations and forecasts] {{Webarchive|url=https://web.archive.org/web/20210320080712/https://manati.orbit.nesdis.noaa.gov/SVW_nextgen/QuikSCAT_maritime_report_final.pdf |date=2021-03-20 }} ''[[NOAA]]'', December 2008. Accessed: 26 February 2011.</ref> A survey for the six years 2008 through 2013 estimates average losses of individual containers overboard at 546 per year, and average total losses including catastrophic events such as vessel sinkings or groundings at 1,679 per year<ref name=WSCsurvey>[http://www.worldshipping.org/industry-issues/safety/Containers_Lost_at_Sea_-_2014_Update_Final_for_Dist.pdf Survey Results for Containers Lost At Sea –  2014 Update] {{Webarchive|url=https://web.archive.org/web/20201108125328/https://www.worldshipping.org/industry-issues/safety/Containers_Lost_at_Sea_-_2014_Update_Final_for_Dist.pdf |date=2020-11-08 }}, June 2014. Accessed: 16 August 2019.</ref> More recently, a survey conducted by the WSC from 2008–2019, saw an average of 1,382 shipping containers lost at sea. However, in the 3-year period from 2017–2019, that number was nearly halved, down to an average of 779 containers lost annually. Most go overboard on the open sea during storms but there are some examples of whole ships being lost with their cargo.<ref>{{cite news|url=http://news.bbc.co.uk/2/hi/science/nature/3917539.stm|title=Freak waves spotted from space|date=22 July 2004|access-date=6 October 2009 | work=BBC News}}</ref> One major shipping accident occurred in 2013 when the MOL Comfort sank with 4,293 containers onboard in the Indian Ocean.<ref name=":1">{{Cite web |last=Stoltz |first=Ryan |date=February 27, 2022 |title=How Many Shipping Containers are Lost at Sea Annually? |url=https://www.containeraddict.com/how-many-shipping-containers-are-lost-at-sea/ |access-date=April 15, 2022 |website=Container Addict}}</ref> When containers are dropped, they immediately become an environmental threat – termed "[[marine debris]]".<ref name="noaa">[http://marinedebris.noaa.gov/whatis/welcome.html#sources Sources of Marine Debris] ''[[NOAA]]''. Retrieved: 25 November 2010.</ref> Once in the ocean, they fill with water and sink if the contents cannot hold air. Rough waters smash the container, sinking it quickly.<ref name=TTlost/>

As container ships get larger and stacking becomes higher, the threat of containers toppling into the sea during a storm increases.  This results from a phenomenon called "[[parametric rolling]]," by which a ship can roll 30-40 degrees during rough seas creating a powerful torque on a 10-high stack of containers which can easily snap lashings and locks of the stack, resulting in losses into the sea.<ref>[https://global.lockton.com/gb/en/news-insights/shipping-firms-experience-a-sharp-rise-in-containers-lost-at-sea  "Shipping firms experience a sharp rise in containers lost at sea," Feb. 25, 2021, Lockton Companies]</ref>
[[File:2006container fleet.PNG|thumb|Container fleet in 2006]]

==See also==
{{Portal|Transport}}
*[[BBC Box]]
*[[Container on barge]]
*[[Environmental impact of shipping]]
*[[List of largest container ships]]
*[[List of world's longest ships]]
*[[Ship resistance and propulsion]]

==References==
{{Reflist}}

==Sources==
===Shipboard operations===
*{{cite book |editor=Hayler, William |author=Conrad, Edward E.|title=Merchant Marine Officers' Handbook: based on the original edition by Edward A. Turpin and William A. MacEwen |chapter=12. Containership Operations|publisher=Cornell Maritime Press |location=Cambridge, Md |year=1989 |edition= 5th|isbn=978-0-87033-379-8 }}
*{{cite book |first=Mark| last=Huber |title=Tanker operations: a handbook for the person-in-charge (PIC) |publisher=Cornell Maritime Press |location=Cambridge, MD |year=2001 |isbn=978-0-87033-528-0 }}
*{{cite book |author=Cudahy, Brian J. |title=Box boats: how container ships changed the world |publisher=Fordham University Press |location=New York |year=2006 |isbn=978-0-8232-2568-2 |url-access=registration |url=https://archive.org/details/boxboats00bria }}
* {{cite book |last=Hayler |first=William B. |author2=Keever, John M. |title=American Merchant Seaman's Manual |year=2003 |publisher= Cornell Maritime Pr |isbn= 978-0-87033-549-5 }}
*{{cite web |url=http://www.peckhale.com/PDFs/LooseTwistlocks.pdf |title= Container Stowage and Securing Systems |author=Peck and Hale |year=2000 |publisher=Peck & Hale |location=West Sayville, NY |archive-url=https://web.archive.org/web/20110715060948/http://www.peckhale.com/PDFs/LooseTwistlocks.pdf|archive-date=2011-07-15|url-status=dead |access-date=2011-03-01 }}
*{{cite book |author1=Sauerbier, Charles L. |author2=Meurn, Robert J. |title=Marine Cargo Operations: a guide to stowage |publisher=Cornell Maritime Press |location=Cambridge, Md |year=2004 |isbn=978-0-87033-550-1 }}

===Vessel categories===
*{{cite book |author=Autoridad del Canal de Panamá |author-link=Panama Canal Authority |title=MR Notice to Shipping Number N-1-2005. |url=http://www.pancanal.com/eng/maritime/notices/n01-05.pdf |access-date=2008-04-01 |series=Notices to Shipping |year=2005 |publisher=Autoridad del Canal de Panamá |location=Balboa-Ancon |pages=11–12 |archive-date=2011-06-11 |archive-url=https://web.archive.org/web/20110611094533/http://www.pancanal.com/eng/maritime/notices/n01-05.pdf |url-status=dead }}
*{{cite book|author=Autoridad del Canal de Panamá|author-link=Panama Canal Authority|title=Proposal for the Expansion of the Panama Canal: Third Set of Locks Project|url=http://www.acp.gob.pa/eng/plan/documentos/propuesta/acp-expansion-proposal.pdf|access-date=2011-03-06|series=Notices to Shipping|year=2006|publisher=Autoridad del Canal de Panamá|location=Balboa-Ancon|url-status=dead|archive-url=https://web.archive.org/web/20110721055325/http://www.acp.gob.pa/eng/plan/documentos/propuesta/acp-expansion-proposal.pdf|archive-date=2011-07-21}}
*{{cite book |author=Autoridad del Canal de Panamá |author-link=Panama Canal Authority |title=Dimensions for Future Lock Chambers and "New Panamax" Vessels |url=http://www.pancanal.com/common/maritime/advisories/2009/a-02-2009.pdf |access-date=2011-03-06 |series=Notices to Shipping |year=2009 |publisher=Autoridad del Canal de Panamá |location=Balboa-Ancon |archive-url=https://web.archive.org/web/20090506230338/http://www.pancanal.com/common/maritime/advisories/2009/a-02-2009.pdf |archive-date=2009-05-06 |url-status=dead }}
*{{cite web |url=http://www.mandieselturbo.eu/files/news/filesof4672/5510-0040-01ppr_low.pdf |title=Propulsion Trends in Container Vessels |author=MAN Diesel |author-link= MAN Diesel|year=2009 |publisher=MAN Diesel |location=Copenhagen |archive-url=https://web.archive.org/web/20120507192232/http://www.mandieselturbo.eu/files/news/filesof4672/5510-0040-01ppr_low.pdf|archive-date=2012-05-07|url-status=dead |access-date=2011-12-29 }}

===Statistics===
*{{cite book |last1=Bureau of Transportation Statistics 2007 |title= Maritime Trade & Transportation |url=http://www.bts.gov/publications/maritime_trade_and_transportation/2007/pdf/entire.pdf |archive-url=https://web.archive.org/web/20090510170308/https://www.bts.gov/publications/maritime_trade_and_transportation/2007/pdf/entire.pdf|archive-date=2009-05-10|url-status=dead |access-date=2011-03-02 |year=2008 |publisher=United States Department of Transportation, Research and Innovative Technology Administration |location= Washington, D.C. }}
* {{cite book
| author = Central Intelligence Agency
| author-link = Central Intelligence Agency
| title = CIA World Factbook 2009
| url = https://archive.org/details/ciaworldfactbook00cent
| access-date = 2011-02-21
| year = 2009
| publisher = Skyhorse Publishing
| isbn = 978-1-60239-080-5
| url-access = registration
}}
*{{cite book |author=Economic and Social Commission for Asia and the Pacific |title=Review of Developments in Transport in Asia and the Pacific 2007: Data and Trends (Economic and Social Commission for Asia and the Pacific) |publisher=United Nations |location=New York |year=2009 |pages=144–146 |isbn=978-92-1-120534-3 |url=https://books.google.com/books?id=H4cQh5-7uNMC&q=%22container+ship%22++feeder&pg=PR2 |access-date=2011-03-05 }}{{Dead link|date=December 2023 |bot=InternetArchiveBot |fix-attempted=yes }}
*{{cite book |author=United Nations Conference on Trade and Development (UNCTAD) |author-link=United Nations Conference on Trade and Development |title=Review of Maritime Transport, 2010 |url=http://www.unctad.org/Templates/Download.asp?docid=14218&lang=1&intItemID=2068 |year=2010 |publisher=United Nations |location=New York and Geneva |format=PDF |isbn=978-92-1-112810-9 }}{{dead link|date=August 2017 |bot=InternetArchiveBot |fix-attempted=yes }}
*{{cite book |author=United Nations Conference on Trade and Development (UNCTAD) |author-link=United Nations Conference on Trade and Development |title=Review of Maritime Transport, 2012 |url=http://unctad.org/en/PublicationsLibrary/rmt2012_en.pdf |year=2012 |publisher=United Nations |location=New York and Geneva |isbn=978-92-1-112860-4 }}

===History===
*{{cite journal |last=Bohlman |first=Michael T. |date= September 2001 |title=ISO's container standards are nothing but good news |journal=ISO Bulletin |pages=12–15 |url=http://www.iso.org/iso/container0109.pdf |archive-url=https://web.archive.org/web/20080409165027/http://www.iso.org/iso/container0109.pdf|archive-date=2008-04-09|url-status=dead }}
*{{cite journal |author=The New Scientist |date=22 May 1958|title= News and Comments|journal=New Scientist |volume=4 |issue=79 |page=10 |url=https://books.google.com/books?id=nJa21Dy8XxwC&q=container+ship&pg=PA1 |archive-url=https://web.archive.org/web/20140707171134/http://books.google.com/books?id=nJa21Dy8XxwC&lpg=PA10&dq=container%20ship&pg=PA1#v=onepage&q=container%20ship&f=false |url-status=dead |archive-date=7 July 2014 }}.
*{{cite journal |last=Cudahy |first=Brian J. |date=September–October 2006 |title= The Containership Revolution: Malcom McLean's 1956 Innovation Goes Global |journal=TR News |volume=246 |pages=5–9 |access-date=2011-03-01 |url=http://onlinepubs.trb.org/onlinepubs/trnews/trnews246.pdf }}.
*{{cite web|url=http://www.horizon-lines.com/About-Horizon/History.aspx |title=History of Sea-Land, CSX Lines, and Horizon Lines Timeline (1956–Present) |author=Horizon Lines |work=Horizon Lines web site |access-date=2011-02-24 |url-status=dead |archive-url=https://web.archive.org/web/20101227184141/http://www.horizon-lines.com/About-Horizon/History.aspx |archive-date=2010-12-27 }}
*{{cite book |title=More Troubled Waters: Fishing, Pollution, and FOCs |last1=International Confederation of Free Trade Unions |last2=Trade Union Advisory Committee to the OECD |last3=International Transport Workers' Federation |last4=Greenpeace International |author-link1=International Confederation of Free Trade Unions |author-link2=Trade Union Advisory Committee to the OECD |author-link3=International Transport Workers’ Federation |author-link4=Greenpeace International |year=2002 |publisher=2002 World Summit on Sustainable Development |location=Johannesburg |url=http://www.itfglobal.org/files/seealsodocs/ENG/4056/moretroubledwaters.pdf |access-date=2010-06-12 }}{{Dead link|date=August 2018 |bot=InternetArchiveBot |fix-attempted=yes }}
*{{Cite thesis |degree=M.S. |title=Maritime Shipping Container Security and the Defense Transportation System: Problems and Policy in the 21st Century |url=http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA417484 |author=Jankowski, William M. |year=2003 |publisher=Naval Postgraduate School |access-date=2011-02-23 |archive-date=2011-06-29 |archive-url=https://web.archive.org/web/20110629001053/http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA417484 |url-status=dead }}
*{{cite book |author=Levinson, Marc |title=The Box: How the Shipping Container Made the World Smaller and the World Economy Bigger |publisher=Princeton University Press |location=Princeton, N.J |year=2006 |isbn=978-0-691-12324-0 |title-link=The Box: How the Shipping Container Made the World Smaller and the World Economy Bigger }}
*{{cite book|author1=Nichols, C. Reid |author2=Williams, Robert G. |title=Encyclopedia of Marine Science|url=https://books.google.com/books?id=0zD1tVXZrIcC&pg=PT121|access-date=8 March 2011|date=November 2008|publisher=Infobase Publishing|isbn=978-0-8160-5022-2|pages=121–122}}
*{{cite book |author=Roland, Alex |author2=Bolster, W Jeffrey |author3=Keyssar, Alexander |title=The way of the ship: America's maritime history reenvisioned |year=2008 |publisher=John Wiley and Sons |location=Hoboken, New Jersey |isbn=978-0-470-13600-3 }}
*{{cite news |url=http://www.economist.com/node/5624791?story_id=5624791 |title=The container industry: The world in a box |newspaper=The Economist |date=2006-03-16|access-date=2011-02-22}}

===Safety and security===
*{{cite book |author=Michael McNicholas |title=Maritime security: an introduction |publisher=Butterworth Heinemann |location=Boston, MA |year=2008 |isbn=978-0-12-370859-5 |url=https://books.google.com/books?id=4ZIzff8gzi8C&q=%22container+ship%22++feeder&pg=PP1 |access-date=2011-03-05}}
*{{cite journal |author1=Chia-Hsun Chan|author2=Jingjing Xu|author3=Dong-Ping Song|title=An analysis of safety and security risks in container shipping operations: A case study of Taiwan |journal=Safety Science |date=March 2014 |volume=63 |issue=925–7535 |url=https://www.sciencedirect.com/science/article/pii/S092575351300266X|pages=168–178|doi=10.1016/j.ssci.2013.11.008|access-date=17 April 2024|url-access=subscription}}

==External links==
{{external media
|float=right
| image1 =[https://books.google.com/books?id=4dsDAAAAMBAJ&dq=container+ship&pg=PA90 Loading sea-land vessels, c. 1962]
}}
{{Commons category|Container ships}}
*[https://www.economist.com/news/christmas-specials/21636687-romance-high-seas-age-quantification-ancient-and-modern-mariners Ancient and modern mariners: The romance of the high seas in an age of quantification] – article in ''[[The Economist]]'' about a voyage on a 21st-century container ship
*{{cite web|url=http://upcommons.upc.edu/e-prints/bitstream/2117/3051/1/seguridad%20contenedores%20_ingl%20s_.pdf|title=Container Ship Safety|last=Rodrigo de Larrucea |first=Jaime|access-date=19 April 2012}}

{{ModernMerchantShipTypes}}
{{Intermodal containers}}

{{Authority control}}

{{DEFAULTSORT:Container Ship}}
[[Category:Container ships| ]]
[[Category:Maritime transport]]
[[Category:Ship types]]
[[Category:Intermodal transport]]
[[Category:Port infrastructure]]