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The world's longest ships are listed according to their overall length (LOA), which is the maximum length of the vessel measured between the extreme points in fore and aft. In addition, the ships' deadweight tonnage (DWT) and/or gross tonnage (GT) are presented as they are often used to describe the size of a vessel.
The ships are listed by type. Only ship types for which there exist a ship longer than 300 metres (1,000 ft) are included. For each type, the list includes current record-holders either as individual ships, ship classes or standard designs, up to four runner-ups, and all longer ships that have been scrapped.
The list does not include non-self-propelled floating structures such as the 488 m (1,601 ft) long Prelude FLNG.[1]
Oil tankers[edit]
Name | Length overall | DWT | GT/GRT | In service | Status | Notes | Image | Ref |
---|---|---|---|---|---|---|---|---|
Seawise Giant | 458.46 m (1,504 ft) | 564,650 DWT | 260,851 GT | 1979–2009 | Broken up | Originally smaller, jumboisation made Seawise Giant the largest ship ever by length, displacement (657,019 tonnes), and deadweight tonnage. | [2] | |
Batillus class (4 ships) | 414.22 m (1,359 ft) | 553,661–555,051 DWT | 274,837–275,276 GT | 1976–2003 | Broken up | The largest and longest ships ever to be laid down per original plans. They became second only to Seawise Giant (after its jumboisation) for deadweight tonnage and length overall. | [3][4][5][6][7] | |
406.57 m (1,334 ft) | 516,421–516,891 DWT | 247,160–247,161 GT | 1977–2002 | Broken up | [8] | |||
Nai SuperbaNai Genova | 381.92 m (1,253 ft) | 409,400 DWT | 1978–2001 | Broken up | [9][10] | |||
Berge EmperorBerge Empress | 381.82 m (1,253 ft) | 423,745 DWT | 1975–2004 | Broken up | [11][12] | |||
TI class (4 ships) | 380 m (1,247 ft) | 441,893 DWT | 234,006 GT | 2002– | In service | [13] |
Bulk carriers[edit]
Name | Length overall | DWT | GT/GRT | In service | Status | Notes | Image | Ref |
---|---|---|---|---|---|---|---|---|
Valemax (68 ships) | 360–362 m (1,181–1,188 ft) | 380,000–400,000 DWT | 200,000 GT | 2011– | In service | As of 2018, there are five different ship designs that are referred to as Valemax ships. | [14] | |
Berge Stahl | 342 m (1,122 ft) | 364,767 DWT | 175,720 GT | 1986–2021 | Broken up | Berge Stahl was the longest and largest bulk carrier in 1986–2011. | [15] | |
Tubarao MaruBrasil MaruGlobal Harmony | 340 m (1,115 ft) | 327,095–327,180 DWT | 160,774 GT | 2007– | In service | [16][17] | ||
Ruhr OreAlster Ore | 340 m (1,115 ft) | 305,836–305,893 DWT | 171,924 GT | 1987–2011 | Broken up | [19] | ||
Stellar AceStellar BannerStellar Crown | 340 m (1,115 ft) | 300,660 DWT | 151,596 GT | 2015– | In service | Stellar Banner sank in 2020.[21] | [22][23] |
Container ships[edit]
Name | Length overall | DWT | Gross tonnage | In service | Status | Image | Ref |
---|---|---|---|---|---|---|---|
399.9 m (1,312 ft) | 235,579 DWT | 235,579 GT | 2021– | In service | [25] | ||
BarzanAl MuraykhAl NefudAl ZubaraAl DahnaTihama | 400 m (1,312 ft) | 199,744 DWT | 195,636 GT | 2015– | In service | [27][28][29][30][31][32] | |
MOL TriumphMOL TrustMOL TributeMOL Tradition | 400 m (1,312 ft) | 192,672 DWT | 199,000 GT | 2017– | In service | [33][34][35] | |
MSC DianaMSC IngyMSC EloaneMSC MirjamMSC RifayaMSC Leanne | 400 m (1,312 ft) | 202,036 DWT | 193,489 GT | 2016– | In service | [37][38][39][40][41][42] | |
MSC AnnaMSC Viviana | 399.98 m (1,312 ft) | 185,503 DWT | 187,587 GT | 2016– | In service | [43][44] | |
Ever GoldenEver GeniusEver GiftedEver GloryEver GlobeEver GoodsEver GivenEver GradeEver GentleEver GovernEver GreetMOL Treasure MOL Truth | 399.96 m (1,312 ft) | 199,692 DWT | 219,775 GT | 2017– | In service | [45][46][47][48][49][50][51][52][53][54][55][56] |
Passenger ships[edit]
Name | Length overall | Gross tonnage | In service | Status | Image | Ref |
---|---|---|---|---|---|---|
Oasis class (5 ships) | 360–362 m (1,181–1,188 ft) | 225,282–226,963 GT | 2009– | In service | [58][59][60][61] | |
Quantum class (5 ships) | 347.06–348 m (1,139–1,142 ft) | 168,666 GT | 2014– | In service | [62][63][64][65] | |
Queen Mary 2 | 345.03 m (1,132.0 ft) | 148,527 GT | 2003– | In service | [66][67] | |
Iona | 344.5 m (1,130.2 ft) | 184,089 GT | 2020– | In service | [68] | |
Mardi Gras | 344.4 m (1,130 ft) | 181,808 GT | 2020– | In service | [69] |
Other[edit]
Other longest ships of their type.
Name | Type | Length overall | DWT | GT/GRT | In service | Status | Notes | Image | Ref |
---|---|---|---|---|---|---|---|---|---|
Pioneering Spirit | Crane vessel | 382 m (1,253 ft) | 499,125 DWT | 403,342 GT | 2015– | In service | Pioneering Spirit is the largest twin-hulled vessel ever built as well as, at 124 metres (407 ft), the widest ship in the world. Photo is prior to renaming of vessel. | [70][71] | |
Q-Max (14 ships) | LNG carrier | 345 m (1,132 ft) | 128,900 DWT | 163,922 GT | 2008– | In service | [72] | ||
USS Enterprise | Aircraft carrier | 342 m (1,122 ft) | 1961–2013 | Retired | USS Enterprise, the longest aircraft carrier ever built, was inactivated in December 2012. | [73][74] | |||
Paul R. Tregurtha | Lake freighter | 309 m (1,014 ft) | 1981– | In service | The current Queen of the Lakes (the longest ship operating on the Great Lakes), and last of the '1000-footers' launched there. | [75] |
See also[edit]
References[edit]
- ^'Prelude FLNG - An Australian Gas Project'(PDF). Shell. Retrieved 8 November 2020.
The Prelude FLNG facility has thrusters to ensure it remains steady during production and offloading, but it is a fixed facility, with no means of propulsion.
- ^Auke Visser. 'Jahre Viking'. International Super Tankers. Retrieved 24 August 2011.
- ^Auke Visser. 'Batillus'. International Super Tankers. Retrieved 24 August 2011.
- ^Auke Visser. 'Pierre Guillaumat'. International Super Tankers. Retrieved 24 August 2011.
- ^Auke Visser. 'Bellamya'. International Super Tankers. Retrieved 24 August 2011.
- ^Auke Visser. 'Prairial'. International Super Tankers. Retrieved 24 August 2011.
- ^The Tanker Register 1978 ISSN 0305-179X
- ^Auke Visser. 'Kapetan Giannes'. International Super Tankers. Retrieved 24 August 2011.
- ^'Nai Superba'. www.aukevisser.nl. Retrieved 28 January 2018.
- ^'Nai Genova'. www.aukevisser.nl. Retrieved 28 January 2018.
- ^'Berge Emperor'. www.aukevisser.nl. Retrieved 28 January 2018.
- ^'Berge Empress'. www.aukevisser.nl. Retrieved 28 January 2018.
- ^Auke Visser. 'TI Africa'. International Super Tankers. Retrieved 24 August 2011.
- ^'Vale Brasil (30616)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 19 May 2013.
- ^'Berge Stahl (14702)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 4 February 2018.
- ^'Tubarao Maru (084055)'. Register of ships. Nippon Kaiji Kyokai. Retrieved 4 February 2018.
- ^'Brasil Maru (075233)'. Register of ships. Nippon Kaiji Kyokai. Retrieved 4 February 2018.
- ^'Global Harmony (094238)'. Register of ships. Nippon Kaiji Kyokai. Retrieved 4 February 2018.
- ^'Alster N (8418162)'. Sea-web. Retrieved 4 February 2018.
- ^'Ruhr N (8410108)'. Sea-web. Retrieved 4 February 2018.
- ^'VÍDEO: Navio Stellar Banner é afundado após 3 meses encalhado na costa do Maranhão'. G1 (in Portuguese). Retrieved 14 June 2020.
- ^'Stellar Ace (9726798)'. Sea-web. Retrieved 4 February 2018.
- ^'Stellar Banner (9726803)'. Sea-web. Retrieved 4 February 2018.
- ^'Stellar Crown (9735775)'. Sea-web. Retrieved 4 February 2018.
- ^https://classdirect.lr.org/assets/LRV43905
- ^says, Brunello (19 May 2021). 'Evergreen takes the biggest boxship mantle away from HMM by just 28 teu'. Splash247. Retrieved 30 July 2021.
- ^'Barzan (33829)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 27 June 2015.
- ^'Al Muraykh (33830)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 27 January 2018.
- ^'Al Nefud (33789)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 27 January 2018.
- ^'Al Zubara (33831)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 27 January 2018.
- ^'Al Dahna (33790)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 27 January 2018.
- ^'Tihama (34453)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 27 January 2018.
- ^'MOL Triumph (9769271)'. Sea-web. Retrieved 4 February 2018.
- ^'MOL Trust (9769283)'. Sea-web. Retrieved 4 February 2018.
- ^'MOL Tribute (9769295)'. Sea-web. Retrieved 4 February 2018.
- ^'MOL Tradition (9769300)'. Sea-web. Retrieved 4 February 2018.
- ^'MSC Diana (34660)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 27 January 2018.
- ^'MSC Ingy (34661)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 27 January 2018.
- ^'MSC Eloane (34662)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 27 January 2018.
- ^'MSC Mirjam (34779)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 27 January 2018.
- ^'MSC Rifaya (34780)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 27 January 2018.
- ^'MSC Leanne (34781)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 27 January 2018.
- ^'MSC Anna (35091)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 27 January 2018.
- ^'MSC Viviana (35092)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 27 January 2018.
- ^'Ever Golden (18265349)'. ABS Record. American Bureau of Shipping. Retrieved 4 August 2020.
- ^'Ever Genius (9786815)'. LR Class Direct. Lloyd's Register. Retrieved 4 August 2020.
- ^'Ever Gifted (189095)'. Register of ships. Nippon Kaiji Kyokai. Retrieved 4 August 2020.
- ^'Ever Glory (9786839)'. LR Class Direct. Lloyd's Register. Retrieved 4 August 2020.
- ^'Ever Globe (199126)'. Register of ships. Nippon Kaiji Kyokai. Retrieved 4 August 2020.
- ^'Ever Goods (18265350)'. ABS Record. American Bureau of Shipping. Retrieved 4 August 2020.
- ^'Ever Given (18265351)'. ABS Record. American Bureau of Shipping. Retrieved 4 August 2020.
- ^'Ever Grade (199001)'. Register of ships. Nippon Kaiji Kyokai. Retrieved 4 August 2020.
- ^'Ever Gentle (19265353)'. ABS Record. American Bureau of Shipping. Retrieved 4 August 2020.
- ^'Ever Govern (19265354)'. ABS Record. American Bureau of Shipping. Retrieved 4 August 2020.
- ^'Ever Greet (199135)'. Register of ships. Nippon Kaiji Kyokai. Retrieved 4 August 2020.
- ^'MOL Treasure (9773222)'. Sea-web. Retrieved 25 March 2021.
- ^'MOL Truth (9773210)'. Sea-web. Retrieved 25 March 2021.
- ^'Oasis of the Seas (27091)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 15 November 2012.
- ^'Allure of the Seas (28329)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 27 January 2018.
- ^'Harmony of the Seas (33249)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 27 January 2018.
- ^'Symphony of the Seas (34719)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 18 February 2021.
- ^'Quantum of the Seas (32027)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 27 January 2018.
- ^'Anthem of the Seas (32028)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 27 January 2018.
- ^'Ovation of the Seas (34050)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 27 January 2018.
- ^'Spectrum of the Seas (36874)'. DNV GL Vessel Register. Det Norske Veritas. Retrieved 18 February 2021.
- ^World Shipping Register. 'SHIPS INDEX - Q'. Retrieved 24 August 2011.
- ^'Queen Mary 2 (9241061)'. LR Class Direct. Lloyd's Register. Retrieved 19 July 2012.
- ^Meyer Werft. 'IONA'. Retrieved 18 February 2021.
- ^GOCCL Navigator. 'Mardi Gras (MD) Fact Sheet'. Retrieved 18 February 2021.
- ^'Pieter Schelte (9593505)'. Equasis. French Ministry for Transport. Retrieved 14 October 2014.
- ^Vessel dimensions and capability rangeArchived 21 September 2014 at the Wayback Machine. Allseas. Retrieved 2014-10-14./
- ^'LNG carrier 'Mozah' delivered to Qatargas and Nakilat' (Press release). Qatargas. 29 September 2008. Archived from the original on 13 July 2015. Retrieved 28 November 2008.
- ^USS Enterprise Nuclear-powered aircraft carrierArchived 23 July 2011 at the Wayback Machine. military-today.com
- ^'Obit for a Carrier'. Time. 7 January 2013. Retrieved 13 September 2013.
- ^George Wharton. 'Great Lakes Fleet Page Vessel Feature -- Paul R. Tregurtha'. Boatnerd. Archived from the original on 1 August 2010. Retrieved 8 August 2010.
If you have given Selenium interviews, you must have faced the question which signifies the title of this post. Being a Selenium enthusiast, you must know the logic behind writing WebDriver driver = new ChromeDriver() or new FirefoxDriver() or new IEDriver(), etc. If it's an authentic question then it will be asked everywhere, even in normal conversation among new Selenium enthusiasts and you should be capable enough to answer this.
One thing you should keep in mind that if I am writing WebDriver driver = new ChromeDriver() as the title of this post, then it doesn't mean that this post is only applicable to ChromeDriver, instead, it is applicable to other driver classes as well, like FirefoxDriver(), SafariDriver(), IEDriver(), etc.
We will decode this code today. 😀
Recommended Readings:Must read changes in Selenium 4 Alpha Release
Interview Questions Related to WebDriver and ChromeDriver or FirefoxDriver initializations
Let's discuss some of the interview questions generally asked by interviewer related to the above context.
Webdrive Enterprise 2018 Build 18 0 600 Ft House
1. Can we use WebDriver driver = new WebDriver()?
2. Can we use ChromeDriver driver = new ChromeDriver()?
3. Why do we only use WebDriver driver = new ChromeDriver()?
4. What are the significances of RemoteWebDriver in Selenium?
For more Selenium interview questions click on below link:
These are the general questions asked by people. Once you finish reading this article, you will get the answer to all the questions listed above so I would ask you to pay attention here and read this article thoroughly.
I will start with basic related java topics here so that a novice reader will not get confused. So let's start with the interface and I assume you are well aware of the class in java.
What is an interface in Java?
Webdrive Enterprise 2018 Build 18 0 600 Ft 1/2
An interface in java is the blueprint of the class. It is used to achieve 100% abstraction as well as a way to multiple inheritances in java. The interface has static constants and default, static and private methods. It doesn't hold the method body, thus, the methods are implemented in a different class.
The interface in java declared with a keyword called interface. There can be a nested interface as well. If any class wants to use the methods of the interface then that class have to implement the interface, whereas, one interface can easily extends another interface, hence, interface develops IS-A relationship.
What is Polymorphism in Java?
Polymorphism in Java means a single method will be used in different ways. Polymorphism can be achieved either at compile time or at runtime through method overloading and method overriding.
These two concepts are important if you want to understand why do we use WebDriver driver = new ChromeDriver().
Structure of WebDriver driver = new ChromeDriver()
Look at the above image. We see that Selenium starts fetching WebElements from SearchContext interface. This interface has findElement(s) abstract methods, which are further defined in RemoteWebDriver class. So WebDriver interface at first extends SearchContext interface, just to identify the WebElements to perform operations. Further, WebDriver has methods like get(URL), getCurrentUrl(), getTitle(), etc, which is mainly used at the top level of the automation project. Next, there is a class called RemoteWebDriver which has methods and definition to manage sessions, URL, Capabilities, and expansion of the abstracts methods of the WebDriver interface. So basically RemoteWebDriver has the implementation of all the abstract methods of the SearchContext interface and WebDriver interface.
Finally, RemoteWebDriver is extended by the classes of the native browser like ChromeDriver(), FirefoxDriver(), SafariDriver(), etc.
Let's discuss the major differences between RemoteWebDriver and WebDriver.
Differences between RemoteWebDriver and WebDriver
WebDriver is an interface and as per the concept of the interface, we can't keep the body of the methods written inside it. Hence, we use RemoteWebDriver class to implement all the methods written inside WebDriver interface, like findElement(), switchTo(), get(), findElements(), etc.
Every browser has the separate definition to perform testing in their browser, which basically brings the concept to have separate bindings and classes for each browser like ChromeDriver(), FIrefoxDriver(), etc. These native browser's class extends RemoteWebDriver. We can easily run tests in our local machine by creating the instance of these classes. But, when we want to run our tests remotely then we can't use these native browser's class. In such a case, we have to configure and parameterize the RemoteWebDriver constructor.
We require a Selenium standalone server to perform our tests on the remote server. Let's take Grid as of now, so we should have URL of the grid passed in the RemoteWebDriver constructor and capabilities will define the browsers at the grid.
If we code against the WebDriver interface then it will be helpful to separately allocate the session ids in case of parallel execution of the tests. In a nutshell, we can say that the RemoteWebDriver is the concrete implementation of the WebDriver interface and all the URLs will be routed via RemoteWebDriver only.
Why can't we use WebDriver driver = new WebDriver()?
If we go back to the first class of Java then it reminds us that we create the object of the classes. Objects are similar to real-time objects, hence, the above definition is not possible as WebDriver is not a class, rather, it's an interface. Therefore, we can't create an object of the WebDriver.
Definition of ChromeDriver driver = new ChromeDriver()
This definition is logically correct, but technically not advisable for test automation project. We already knew that ChromeDriver or any other native browser's driver class extends RemoteWebDriver, hence, implements all the methods of the WebDriver. So the test will run successfully on the Chrome browser. But, when we want to perform cross-browser testing then in that it will require object instantiation of a different browser. Thus, session handling will be difficult and cross-browser testing won't be applicable in that case. Overall, testing will be inefficient.
Advisable- WebDriver driver = new ChromeDriver()
This is the advisable way and it resolves all the problems of session handling and cross-browser testing. Here we are creating an object of the ChromeDriver() by taking reference to the WebDriver interface.
We are just assigning one session per WebDriver reference, so, here reference of WebDriver is casting different browser's class like ChromeDriver, FirefoxDriver, IEDriver, SafariDriver, etc. This technique makes browser switching easier because we are sharing the same reference of the WebDriver with different browsers and here benefit is that all the browsers are extending RemoteWebDriver.
Third party browsers and APIs basically implements methods written inside WebDriver, hence, it is the whim of the browser's developers how they are declaring those methods. We can conclude that we are performing runtime polymorphism here with methods written inside WebDriver interface.
See image below which lists all the methods written inside ChromeDriver and WebDriver separately.
This was all about the most discussed topic. Leave your doubts in the comment section below and do not forget to join our Facebook group for quick updates.