An oil tanker , also known as a petroleum tanker , is a ship designed for the bulk transport of oil or its products. There are two basic types of oil tankers: crude tankers and product tankers . Crude tankers move large quantities of unrefined crude oil from its point of extraction to refineries . Product tankers, generally much smaller, are designed to move refined products from refineries to points near consuming markets.
118-661: The River Cleddau ( Welsh : Afon Cleddau ) consists of the Eastern and Western Cleddau rivers in Pembrokeshire , west Wales . They unite to form the Daugleddau estuary and the important harbour of Milford Haven ( Milford Haven Waterway ). The name of the combined estuary – the Daugleddau – means “the two Cleddaus”. The name Cleddau, whilst seeming to be a plural ('-au' generally denotes plurality in Welsh ) comes from
236-570: A 40,000 DWT tanker, $ 60.7 million for a 80,000–95,000 DWT , $ 73 million for a 130,000–150,000 DWT , and $ 116 million for 250,000–280,000 DWT tanker. For a concrete example, in 2006, Bonheur subsidiary First Olsen paid $ 76.5 million for Knock Sheen , a 159,899 DWT tanker. The cost of operating the largest tankers, the Very Large Crude Carriers, is currently between $ 10,000 and $ 12,000 per day. Oil tankers generally have from 8 to 12 tanks. Each tank
354-441: A Welsh Language Scheme, which indicates its commitment to the equality of treatment principle. This is sent out in draft form for public consultation for a three-month period, whereupon comments on it may be incorporated into a final version. It requires the final approval of the now defunct Welsh Language Board ( Bwrdd yr Iaith Gymraeg ). Thereafter, the public body is charged with implementing and fulfilling its obligations under
472-594: A Welsh-language edge inscription was used on pound coins dated 1985, 1990 and 1995, which circulated in all parts of the UK prior to their 2017 withdrawal. The wording is Pleidiol wyf i'm gwlad (Welsh for 'True am I to my country'), and derives from the national anthem of Wales, " Hen Wlad Fy Nhadau ". UK banknotes are in English only. Some shops employ bilingual signage. Welsh sometimes appears on product packaging or instructions. The UK government has ratified
590-663: A census glossary of terms to support the release of results from the census, including their definition of "main language" as referring to "first or preferred language" (though that wording was not in the census questionnaire itself). The wards in England with the most people giving Welsh as their main language were the Liverpool wards of Central and Greenbank ; and Oswestry South in Shropshire . The wards of Oswestry South (1.15%), Oswestry East (0.86%) and St Oswald (0.71%) had
708-518: A center of innovation after Edwin Drake had struck oil near Titusville, Pennsylvania . Break-bulk boats and barges were originally used to transport Pennsylvania oil in 40-US-gallon (150 L) wooden barrels. But transport by barrel had several problems. The first problem was weight: they weighed 29 kilograms (64 lb), representing 20% of the total weight of a full barrel. Other problems with barrels were their expense, their tendency to leak, and
826-503: A country, called its flag state . 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 2007, the United States Central Intelligence Agency statistics count 4,295 oil tankers of 1,000 long tons deadweight (DWT) or greater worldwide. Panama
944-470: A few thousand metric tons of deadweight (DWT) to ultra-large crude carriers (ULCCs) of 550,000 DWT . Tankers move approximately 2.0 billion metric tons (2.2 billion short tons ) of oil every year. Second only to pipelines in terms of efficiency, the average cost of transport of crude oil by tanker amounts to only US$ 5 to $ 8 per cubic metre ($ 0.02 to $ 0.03 per US gallon). Some specialized types of oil tankers have evolved. One of these
1062-636: A set of 21 vertical watertight compartments for extra buoyancy . The ship had a length overall of 56 metres (184 ft), a beam of 8.2 metres (27 ft), and a draft of 2.7 metres (9 ft). Unlike later Nobel tankers, the Zoroaster design was built small enough to sail from Sweden to the Caspian by way of the Baltic Sea , Lake Ladoga , Lake Onega , the Rybinsk and Mariinsk Canals and
1180-479: A single discourse (known in linguistics as code-switching ). Welsh speakers are largely concentrated in the north and west of Wales, principally Gwynedd , Conwy County Borough , Denbighshire , Anglesey , Carmarthenshire , north Pembrokeshire , Ceredigion , parts of Glamorgan , and north-west and extreme south-west Powys . However, first-language and other fluent speakers can be found throughout Wales. Welsh-speaking communities persisted well into
1298-990: Is a Celtic language of the Brittonic subgroup that is native to the Welsh people . Welsh is spoken natively in Wales , by some in England , and in Y Wladfa (the Welsh colony in Chubut Province , Argentina ). It is spoken by smaller numbers of people in Canada and the United States descended from Welsh immigrants, within their households (especially in Nova Scotia ). Historically, it has also been known in English as "British", "Cambrian", "Cambric" and "Cymric". The Welsh Language (Wales) Measure 2011 gave
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#17327727970381416-674: Is available throughout Europe on satellite and online throughout the UK. Since the digital switchover was completed in South Wales on 31 March 2010, S4C Digidol became the main broadcasting channel and fully in Welsh. The main evening television news provided by the BBC in Welsh is available for download. There is also a Welsh-language radio station, BBC Radio Cymru , which was launched in 1977. Supertanker Oil tankers are often classified by their size as well as their occupation. The size classes range from inland or coastal tankers of
1534-688: Is considered to have lasted from then until the 14th century, when the Modern Welsh period began, which in turn is divided into Early and Late Modern Welsh. The word Welsh is a descendant, via Old English wealh, wielisc , of the Proto-Germanic word * Walhaz , which was derived from the name of the Celtic people known to the Romans as Volcae and which came to refer to speakers of Celtic languages, and then indiscriminately to
1652-413: Is more efficient, and better protection in low-impact collisions and grounding. The same report lists the following as some drawbacks to the double-hull design, including higher build costs, greater operating expenses (e.g. higher canal and port tariffs), difficulties in ballast tank ventilation, the fact that ballast tanks need continuous monitoring and maintenance, increased transverse free surface,
1770-454: Is split into two or three independent compartments by fore-and-aft bulkheads. The tanks are numbered with tank one being the forwardmost. Individual compartments are referred to by the tank number and the athwartships position, such as "one port", "three starboard", or "six center". A cofferdam is a small space left open between two bulkheads, to give protection from heat, fire, or collision. Tankers generally have cofferdams forward and aft of
1888-511: Is the label attached to the Welsh of the 12th to 14th centuries, of which much more remains than for any earlier period. This is the language of nearly all surviving early manuscripts of the Mabinogion , although the tales themselves are certainly much older. It is also the language of the existing Welsh law manuscripts. Middle Welsh is reasonably intelligible to a modern-day Welsh speaker. The Bible translations into Welsh helped maintain
2006-436: Is the naval replenishment oiler , a tanker which can fuel a moving vessel . Combination ore-bulk-oil carriers and permanently moored floating storage units are two other variations on the standard oil tanker design. Oil tankers have been involved in a number of damaging and high-profile oil spills . The technology of oil transportation has evolved alongside the oil industry. Although human use of oil reaches to prehistory,
2124-649: Is tidal. The Western Cleddau (Welsh: Cleddau Wen meaning 'white') has two branches: the eastern branch rises at Llygad Cleddau 51°58′31″N 4°56′36″W / 51.9752°N 4.9434°W / 51.9752; -4.9434 in the parish of Llanfair Nant y Gôf, 4 km south-east of Fishguard . It flows southwest past Scleddau, and meets the western branch at Priskilly 51°56′13″N 5°01′33″W / 51.9370°N 5.0257°W / 51.9370; -5.0257 . The western branch rises at Penysgwarne 51°55′53″N 5°08′14″W / 51.9315°N 5.1373°W / 51.9315; -5.1373 in
2242-732: The Cynfeirdd or "Early Poets" – is generally considered to date to the Primitive Welsh period. However, much of this poetry was supposedly composed in the Hen Ogledd , raising further questions about the dating of the material and language in which it was originally composed. This discretion stems from the fact that Cumbric was widely believed to have been the language used in Hen Ogledd. An 8th-century inscription in Tywyn shows
2360-500: The 2016 Australian census , 1,688 people noted that they spoke Welsh. In the 2011 Canadian census , 3,885 people reported Welsh as their first language . According to the 2021 Canadian census , 1,130 people noted that Welsh was their mother tongue. The 2018 New Zealand census noted that 1,083 people in New Zealand spoke Welsh. The American Community Survey 2009–2013 noted that 2,235 people aged five years and over in
2478-466: The 2021 census , 7,349 people in England recorded Welsh to be their "main language". In the 2011 census, 1,189 people aged three and over in Scotland noted that Welsh was a language (other than English) that they used at home. It is believed that there are as many as 5,000 speakers of Patagonian Welsh . In response to the question 'Does the person speak a language other than English at home?' in
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#17327727970382596-505: The Blockhouses guarding the harbour entrance, is a massive ria which is deep and wide, but sufficiently serpentine to be sheltered from high winds and rough seas, and is thus an excellent natural harbour. Because it can easily accommodate supertankers of 300,000 tonnes and more, it became from 1957 an important centre of the oil industry , with Esso , BP , Texaco , Gulf Oil and Amoco operating terminals and oil refineries . In
2714-538: The European Charter for Regional or Minority Languages in respect of Welsh. The language has greatly increased its prominence since the creation of the television channel S4C in November 1982, which until digital switchover in 2010 broadcast 70 per cent of Channel 4's programming along with a majority of Welsh language shows during peak viewing hours. The all-Welsh-language digital station S4C Digidol
2832-473: The London Tanker Brokers' Panel (LTBP) . At first, they divided the groups as General Purpose for tankers under 25,000 tons deadweight (DWT); Medium Range for ships between 25,000 and 45,000 DWT and Long Range for the then-enormous ships that were larger than 45,000 DWT. The ships became larger during the 1970s, which prompted rescaling. The system was developed for tax reasons as
2950-522: The Oppama shipyard by Sumitomo Heavy Industries, Ltd. , named Seawise Giant . This ship was built with a capacity of 564,763 DWT , a length overall of 458.45 metres (1,504.1 ft) and a draft of 24.611 metres (80.74 ft). She had 46 tanks, 31,541 square metres (339,500 sq ft) of deck, and at her full load draft, could not navigate the English Channel . Seawise Giant
3068-756: The Polish name for Italians) have a similar etymology. The Welsh term for the language, Cymraeg , descends from the Brythonic word combrogi , meaning 'compatriots' or 'fellow countrymen'. Welsh evolved from Common Brittonic , the Celtic language spoken by the ancient Celtic Britons . Classified as Insular Celtic , the British language probably arrived in Britain during the Bronze Age or Iron Age and
3186-602: The Ranunculion fluitantis and Callitricho-Batrachion vegetation); active raised bogs ; and Alder woodlands on floodplains ( Alluvial forests with Alnus glutinosa and Fraxinus excelsior (Alno-Padion, Alnion incanae, Salicion albae)). Additionally, land around a north-eastern tributary of the Eastern Cleddau, Gweunydd Blaencleddau , is designated as a Special Area of Conservation for habitats including: calcium -rich springwater-fed fens - Alkaline fens;
3304-671: The Standard Oil Company along with several of her sister ships . After Glückauf was lost in 1893 after being grounded in fog, Standard Oil purchased the sister ships. The 1880s also saw the beginnings of the Asian oil trade. The idea that led to moving Russian oil to the Far East via the Suez Canal was the brainchild of two men: importer Marcus Samuel and shipowner/broker Fred Lane. Prior bids to move oil through
3422-640: The United States spoke Welsh at home. The highest number of those (255) lived in Florida . Sources: Calls for the Welsh language to be granted official status grew with the establishment of the nationalist political party Plaid Cymru in 1925, the establishment of the Welsh Language Society in 1962 and the rise of Welsh nationalism in the later 20th century. Of the six living Celtic languages (including two revived), Welsh has
3540-537: The V-Plus size designation. With the exception of the pipeline, the tanker is the most cost-effective way to move oil today. Worldwide, tankers carry some 2 billion barrels (3.2 × 10 L) annually, and the cost of transportation by tanker amounts to only US$ 0.02 per gallon at the pump. In 1954, Shell Oil developed the "average freight rate assessment" (AFRA) system which classifies tankers of different sizes. To make it an independent instrument, Shell consulted
3658-585: The Volga River . The aft and the stern was put together and then dismantled to make room for the mid-section as the Caspian Sea was reached. In 1883, oil tanker design took a large step forward. Working for the Nobel company, British engineer Colonel Henry F. Swan designed a set of three Nobel tankers. Instead of one or two large holds, Swan's design used several holds which spanned the width, or beam, of
River Cleddau - Misplaced Pages Continue
3776-608: The southern damselfly ( Coenagrion mercuriale ), marsh fritillary butterfly Euphydryas (Eurodryas, Hypodryas) aurinia ; purple moor-grass meadows - molinia meadows on calcareous, peaty or clayey-silt-laden soils ( Molinion caeruleae ); wet heathland with cross-leaved heath Rhostiroedd gwlyb – Northern Atlantic wet heaths with Erica tetralix ; very wet mires often identified by an unstable 'quaking' surface – transition mires and quaking bogs; and blanket bogs. Welsh language Welsh ( Cymraeg [kəmˈraːiɡ] or y Gymraeg [ə ɡəmˈraːiɡ] )
3894-594: The "hugely important role", adding, "I look forward to working with the Welsh Government and organisations in Wales in developing the new system of standards. I will look to build on the good work that has been done by the Welsh Language Board and others to strengthen the Welsh language and ensure that it continues to thrive." First Minister Carwyn Jones said that Huws would act as a champion for
4012-596: The 1880s identified a small part of Shropshire as still then speaking Welsh, with the "Celtic Border" passing from Llanymynech through Oswestry to Chirk . The number of Welsh-speaking people in the rest of Britain has not yet been counted for statistical purposes. In 1993, the Welsh-language television channel S4C published the results of a survey into the numbers of people who spoke or understood Welsh, which estimated that there were around 133,000 Welsh-speaking people living in England, about 50,000 of them in
4130-536: The 1993 Act nor secondary legislation made under it covers the private sector, although some organisations, notably banks and some railway companies, provide some of their information in Welsh. On 7 December 2010, the Welsh Assembly unanimously approved a set of measures to develop the use of the Welsh language within Wales. On 9 February 2011 this measure, the Welsh Language (Wales) Measure 2011 ,
4248-486: The Assembly which confirms the official status of the Welsh language; which creates a strong advocate for Welsh speakers and will improve the quality and quantity of services available through the medium of Welsh. I believe that everyone who wants to access services in the Welsh language should be able to do so, and that is what this government has worked towards. This legislation is an important and historic step forward for
4366-460: The Daugleddau estuary. Length (Penysgwarne to Picton Point) about 40 km, of which about 9 km is tidal. The Western Cleddau is an example of a misfit stream : the valley is deep, often spectacularly so, although the stream that flows in it is small. The valley was formed at the end of the last Ice Age, when the River Teifi , swollen with melt waters, was prevented from flowing into
4484-550: The Greater London area. The Welsh Language Board , on the basis of an analysis of the Office for National Statistics Longitudinal Study, estimated there were 110,000 Welsh-speaking people in England, and another thousand in Scotland and Northern Ireland. In the 2011 census , 8,248 people in England gave Welsh in answer to the question "What is your main language?" The Office for National Statistics subsequently published
4602-530: The Greek Hellespont Steamship Corporation. Hellespont sold these ships to Overseas Shipholding Group and Euronav in 2004. Each of the sister ships has a capacity of over 441,500 DWT , a length overall of 380.0 metres (1,246.7 ft) and a cargo capacity of 3,166,353 barrels (503,409,900 L). They were the first ULCCs to be double-hulled. To differentiate them from smaller ULCCs, these ships are sometimes given
4720-581: The Irish Sea by an ice dam, and flowed instead westward through the valleys of the Nyfer and Gwaun , then south along the course of the Western Cleddau. Historically, the tidal estuary enabled sea traffic to reach Haverfordwest. It was important also for the export of anthracite, which was mined on its west bank and shipped from Hook. The combined estuary – the Daugleddau - from Picton Point to
4838-576: The Marine Board of the National Academy of Sciences conducted a survey of industry experts regarding the pros and cons of double-hull design. Some of the advantages of the double-hull design that were mentioned include ease of ballasting in emergency situations, reduced practice of saltwater ballasting in cargo tanks decreases corrosion, increased environmental protection, cargo discharge is quicker, more complete and easier, tank washing
River Cleddau - Misplaced Pages Continue
4956-701: The Suez Canal contributed, as did nationalization of Middle East oil refineries . Fierce competition among shipowners also played a part. But apart from these considerations is a simple economic advantage: the larger an oil tanker is, the more cheaply it can move crude oil, and the better it can help meet growing demands for oil. In 1955 the world's largest supertanker was 30,708 GRT and 47,500 LT DWT : SS Spyros Niarchos launched that year by Vickers Armstrongs Shipbuilders Ltd in England for Greek shipping magnate Stavros Niarchos . In 1958 United States shipping magnate Daniel K. Ludwig broke
5074-487: The UK's seventh largest fishing port, operating several hundred fishing trawlers , but with exhaustion of inshore fishing grounds, the docks were too small for large ocean-going trawlers, and fishing is now virtually totally non-existent. Milford was originally built for a naval dockyard, but this project was transferred in 1814 to Pembroke Dock on the opposite side of the estuary, where it operated until closure in 1926. The town of Neyland , originally known as New Milford,
5192-512: The United Kingdom consumed about 1.6 million barrels (250,000 m ) of oil per day in 2009. ULCCs commissioned in the 1970s were the largest vessels ever built, but have all now been scrapped. A few newer ULCCs remain in service, none of which are more than 400 meters long. Because of their size, supertankers often cannot enter port fully loaded. These ships can take on their cargo at offshore platforms and single-point moorings . On
5310-456: The United States and the United Kingdom only had 59 and 27 registered oil tankers, respectively. In 2005, the average age of oil tankers worldwide was 10 years. Of these, 31.6% were under 4 years old and 14.3% were over 20 years old. In 2005, 475 new oil tankers were built, accounting for 30.7 million DWT . The average size for these new tankers was 64,632 DWT . Nineteen of these were VLCC size, 19 were Suezmax, 51 were Aframax, and
5428-496: The Welsh Language (Wales) Measure 2011, all new signs have Welsh displayed first. There have been incidents of one of the languages being vandalised, which may be considered a hate crime . Since 2000, the teaching of Welsh has been compulsory in all schools in Wales up to age 16; this has had an effect in stabilising and reversing the decline in the language. Text on UK coins tends to be in English and Latin. However,
5546-704: The Welsh Language Scheme. The list of other public bodies which have to prepare Schemes could be added to by initially the Secretary of State for Wales, from 1993 to 1997, by way of statutory instrument . Subsequent to the forming of the National Assembly for Wales in 1997, the Government Minister responsible for the Welsh language can and has passed statutory instruments naming public bodies who have to prepare Schemes. Neither
5664-603: The Welsh language official status in Wales. Welsh and English are de jure official languages of the Welsh Parliament, the Senedd , with Welsh being the only de jure official language in any part of the United Kingdom, with English being merely de facto official. According to the 2021 census , the Welsh-speaking population of Wales aged three or older was 538,300 (17.8%) and nearly three quarters of
5782-526: The Welsh language, though some had concerns over her appointment: Plaid Cymru spokeswoman Bethan Jenkins said, "I have concerns about the transition from Meri Huws's role from the Welsh Language Board to the language commissioner, and I will be asking the Welsh government how this will be successfully managed. We must be sure that there is no conflict of interest, and that the Welsh Language Commissioner can demonstrate how she will offer
5900-487: The Welsh of the 16th century, but they are similar enough for a fluent Welsh speaker to have little trouble understanding it. During the Modern Welsh period, there has been a decline in the popularity of the Welsh language: the number of Welsh speakers declined to the point at which there was concern that the language would become extinct. During industrialisation in the late 19th century, immigrants from England led to
6018-585: The Welsh word cleddyf meaning 'sword' and refers perhaps to the manner in which both rivers are incised into the landscape of Pembrokeshire. A number of former Anglican parishes in the area have been combined to form the modern Church in Wales parish of Daugleddau in the Diocese of St Davids . The Eastern Cleddau (Welsh: Cleddau Ddu meaning 'black') rises in the foothills of Mynydd Preseli at Blaencleddau 51°57′50″N 4°40′17″W / 51.9638°N 4.6713°W / 51.9638; -4.6713 in
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#17327727970386136-630: The Welsh-speaking heartlands, with the number dropping to under 50 per cent in Ceredigion and Carmarthenshire for the first time. However, according to the Welsh Language Use Survey in 2019–20, 22 per cent of people aged three and over were able to speak Welsh. The Annual Population Survey (APS) by the Office for National Statistics (ONS) estimated that as of March 2024, approximately 862,700, or 28.0 per cent of
6254-534: The canal had been rejected by the Suez Canal Company as being too risky. Samuel approached the problem a different way: asking the company for the specifications of a tanker it would allow through the canal. Armed with the canal company's specifications, Samuel ordered three tankers from William Gray & Company in northern England. Named Murex , Conch and Clam , each had a capacity of 5,010 long tons of deadweight. These three ships were
6372-487: The cargo tanks, and sometimes between individual tanks. A pumproom houses all the pumps connected to a tanker's cargo lines. Some larger tankers have two pumprooms. A pumproom generally spans the total breadth of the ship. A major component of tanker architecture is the design of the hull or outer structure. A tanker with a single outer shell between the product and the ocean is said to be "single-hulled". Most newer tankers are " double hulled ", with an extra space between
6490-482: The cargo to expand and contract due to temperature changes, and providing a method to ventilate the tanks. The first successful oil tanker was Zoroaster , built by Sven Alexander Almqvist in Motala Verkstad , which carried its 246 metric tons (242 long tons ) of kerosene cargo in two iron tanks joined by pipes. One tank was forward of the midships engine room and the other was aft. The ship also featured
6608-460: The census. In terms of usage, ONS also reported that 14.4 per cent (443,800) of people aged three or older in Wales reported that they spoke Welsh daily in March 2024, with 5.4 per cent (165,500) speaking it weekly and 6.5 per cent (201,200) less often. Approximately 1.7 per cent (51,700) reported that they never spoke Welsh despite being able to speak the language, with the remaining 72.0 per cent of
6726-489: The charterer. Time charter arrangements specify a daily rate, and port costs and voyage expenses are also generally paid by the charterer. The Worldwide Tanker Normal Freight Scale, often referred to as Worldscale, is established and governed jointly by the Worldscale Associations of London and New York. Worldscale establishes a baseline price for carrying a metric ton of product between any two ports in
6844-519: The company had 34 steam-driven oil tankers, compared to Standard Oil's four case-oil steamers and 16 sailing tankers. Until 1956, tankers were designed to be able to navigate the Suez Canal. This size restriction became much less of a priority after the closing of the canal during the Suez Crisis of 1956. Forced to move oil around the Cape of Good Hope , shipowners realized that bigger tankers were
6962-414: The course of the 20th century this monolingual population all but disappeared, but a small percentage remained at the time of the 1981 census. Most Welsh-speaking people in Wales also speak English. However, many Welsh-speaking people are more comfortable expressing themselves in Welsh than in English. A speaker's choice of language can vary according to the subject domain and the social context, even within
7080-489: The creation of Old Welsh, Davies suggests it may be more appropriate to refer to this derivative language as Lingua Britannica rather than characterising it as a new language altogether. The argued dates for the period of "Primitive Welsh" are widely debated, with some historians' suggestions differing by hundreds of years. The next main period is Old Welsh ( Hen Gymraeg , 9th to 11th centuries); poetry from both Wales and Scotland has been preserved in this form of
7198-416: The crew and maintaining the vessel. Finally, in a contract of affreightment or COA, the charterer specifies a total volume of cargo to be carried in a specific time period and in specific sizes, for example a COA could be specified as 1 million barrels (160,000 m ) of JP-5 in a year's time in 25,000-barrel (4,000 m ) shipments. One of the key aspects of any charter party is the freight rate , or
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#17327727970387316-408: The decline in Welsh speakers particularly in the South Wales Valleys. Welsh government processes and legislation have worked to increase the proliferation of the Welsh language, for example through education. Welsh has been spoken continuously in Wales throughout history; however, by 1911, it had become a minority language, spoken by 43.5 per cent of the population. While this decline continued over
7434-499: The demand for new ships started to grow, resulting in 2007 in a record breaking order backlog for shipyards, exceeding their capacity with rising newbuilding prices as a result. This resulted in a glut of ships when demand dropped due to a weakened global economy and dramatically reduced demand in the United States. The charter rate for very large crude carriers, which carry two million barrels of oil, had peaked at $ 309,601 per day in 2007 but had dropped to $ 7,085 per day by 2012, far below
7552-458: The fact that they were generally used only once. The expense was significant: for example, in the early years of the Russian oil industry, barrels accounted for half the cost of petroleum production. In 1863, two sail-driven tankers were built on England's River Tyne . These were followed in 1873 by the first oil-tank steamer, Vaderland (Fatherland), which was built by Palmers Shipbuilding and Iron Company for Belgian owners. The vessel's use
7670-400: The first modern commercial exploitation dates back to James Young 's manufacture of paraffin in 1850. In the early 1850s, oil began to be exported from Upper Burma, then a British colony. The oil was moved in earthenware vessels to the river bank where it was then poured into boat holds for transportation to Britain. In the 1860s, Pennsylvania oil fields became a major supplier of oil, and
7788-454: The first tankers of the Tank Syndicate, forerunner of today's Royal Dutch Shell company. With facilities prepared in Jakarta , Singapore , Bangkok , Saigon , Hong Kong , Shanghai , and Kobe , the fledgling Shell company was ready to become Standard Oil's first challenger in the Asian market. On August 24, 1892, Murex became the first tanker to pass through the Suez Canal . By the time Shell merged with Royal Dutch Petroleum in 1907,
7906-431: The following decades, the language did not die out. The smallest number of speakers was recorded in 1981 with 503,000 although the lowest percentage was recorded in the most recent census in 2021 at 17.8 per cent. By the start of the 21st century, numbers began to increase once more, at least partly as a result of the increase in Welsh-medium education . The 2004 Welsh Language Use Survey showed that 21.7 per cent of
8024-411: The highest number of native speakers who use the language on a daily basis, and it is the Celtic language which is considered the least endangered by UNESCO . The Welsh Language Act 1993 and the Government of Wales Act 1998 provide that the Welsh and English languages be treated equally in the public sector, as far as is reasonable and practicable. Each public body is required to prepare for approval
8142-413: The highest percentage of residents giving Welsh as their main language. The census also revealed that 3,528 wards in England, or 46% of the total number, contained at least one resident whose main language is Welsh. In terms of the regions of England , North West England (1,945), London (1,310) and the West Midlands (1,265) had the highest number of people noting Welsh as their main language. According to
8260-400: The history of Welsh, with rather indistinct boundaries: Primitive Welsh, Old Welsh, Middle Welsh, and Modern Welsh. The period immediately following the language's emergence is sometimes referred to as Primitive Welsh, followed by the Old Welsh period – which is generally considered to stretch from the beginning of the 9th century to sometime during the 12th century. The Middle Welsh period
8378-412: The hull and the storage tanks. Hybrid designs such as "double-bottom" and "double-sided" combine aspects of single and double-hull designs. All single-hulled tankers around the world will be phased out by 2026, in accordance with the International Convention for the Prevention of Pollution from Ships, 1973 (MARPOL). The United Nations has decided to phase out single hull oil tankers by 2010. In 1998,
8496-534: The key to more efficient transport. While a typical T2 tanker of the World War II era was 162 metres (532 ft) long and had a capacity of 16,500 DWT , the ultra-large crude carriers (ULCC) built in the 1970s were over 400 metres (1,300 ft) long and had a capacity of 500,000 DWT . Several factors encouraged this growth. Hostilities in the Middle East which interrupted traffic through
8614-595: The language already dropping inflections in the declension of nouns. Janet Davies proposed that the origins of the Welsh language were much less definite; in The Welsh Language: A History , she proposes that Welsh may have been around even earlier than 600 AD. This is evidenced by the dropping of final syllables from Brittonic: * bardos 'poet' became bardd , and * abona 'river' became afon . Though both Davies and Jackson cite minor changes in syllable structure and sounds as evidence for
8732-506: The language, its speakers and for the nation." The measure was not welcomed warmly by all supporters: Bethan Williams, chairman of the Welsh Language Society, gave a mixed response to the move, saying, "Through this measure we have won official status for the language and that has been warmly welcomed. But there was a core principle missing in the law passed by the Assembly before Christmas. It doesn't give language rights to
8850-555: The language. As Germanic and Gaelic colonisation of Britain proceeded, the Brittonic speakers in Wales were split off from those in northern England, speaking Cumbric, and those in the southwest, speaking what would become Cornish , so the languages diverged. Both the works of Aneirin ( Canu Aneirin , c. 600 ) and the Book of Taliesin ( Canu Taliesin ) were written during this era. Middle Welsh ( Cymraeg Canol )
8968-432: The late 19th century, one of the largest oil companies in the world. Ludvig was a pioneer in the development of early oil tankers. He first experimented with carrying oil in bulk on single-hulled barges. Turning his attention to self-propelled tankships, he faced a number of challenges. A primary concern was to keep the cargo and fumes well away from the engine room to avoid fires. Other challenges included allowing for
9086-527: The mid-1970s, it became briefly the UK's second biggest port in terms of tonnage. The Daugleddau and its several tributary tidal reaches are known collectively as Milford Haven . Length (from Picton Point to the Blockhouses) about 27 km. Historically, the estuary gave seaborne access to castles such as Pembroke and Carew , allowing these to be used as depots in the Norman invasion of Ireland . It
9204-622: The modern period across the border in England. Archenfield was still Welsh enough in the time of Elizabeth I for the Bishop of Hereford to be made responsible, together with the four Welsh bishops, for the translation of the Bible and the Book of Common Prayer into Welsh. Welsh was still commonly spoken there in the first half of the 19th century, and churchwardens' notices were put up in both Welsh and English until about 1860. Alexander John Ellis in
9322-448: The number of Welsh-language speakers to one million by 2050. Since 1980, the number of children attending Welsh-medium schools has increased, while the number going to Welsh bilingual and dual-medium schools has decreased. Welsh is considered the least endangered Celtic language by UNESCO . The language of the Welsh developed from the language of Britons . The emergence of Welsh was not instantaneous and clearly identifiable. Instead,
9440-438: The operating costs of these ships. As a result, several tanker operators laid up their ships. Prices rose significantly in 2015 and early 2016, but delivery of new tankers was projected to keep prices in check. Owners of large oil tanker fleets include Teekay Corporation , A P Moller Maersk , DS Torm , Frontline , MOL Tankship Management , Overseas Shipholding Group , and Euronav . In 2005, oil tankers made up 36.9% of
9558-430: The other end of the journey, they often pump their cargo off to smaller tankers at designated lightering points off-coast. Supertanker routes are typically long, requiring them to stay at sea for extended periods, often around seventy days at a time. The act of hiring a ship to carry cargo is called chartering. (The contract itself is known as a charter party . ) Tankers are hired by four types of charter agreements:
9676-538: The parish of Mynachlog-ddu . It flows southwest through a broad moorland valley to Gelli Hill, where the River Syfynwy joins it. It then flows south through a deep valley past Llawhaden and becomes tidal at Canaston Bridge , the lowest crossing point. The estuary joins that of the Western Cleddau at Picton Point 51°46′05″N 4°53′46″W / 51.768°N 4.896°W / 51.768; -4.896 . Length about 34 km of which about 7 km
9794-447: The parish of Llanreithan and flows east to Priskilly. The combined stream flows through Wolf's Castle, where it enters the spectacular 90 m deep Treffgarne gorge, cutting through the hard volcanic rocks of Treffgarne Mountain. It then flows south to Haverfordwest , where it becomes tidal, this being the lowest bridge crossing. The tidal estuary expands into a deep ria , and unites with the Eastern Cleddau estuary at Picton Point, to form
9912-425: The past, ships of the smaller Aframax and Suezmax classes are no longer regarded as supertankers. "Supertankers" are the largest oil tankers, and the largest mobile man-made structures. They include very large and ultra-large crude carriers (VLCCs and ULCCs – see above) with capacities over 250,000 DWT. These ships can transport 2,000,000 barrels (320,000 m ) of oil/318,000 metric tons. By way of comparison,
10030-473: The people of Wales in every aspect of their lives. Despite that, an amendment to that effect was supported by 18 Assembly Members from three different parties, and that was a significant step forward." On 5 October 2011, Meri Huws , Chair of the Welsh Language Board , was appointed the new Welsh Language Commissioner. She released a statement that she was "delighted" to have been appointed to
10148-551: The people of the Western Roman Empire . In Old English the term went through semantic narrowing , coming to refer to either Britons in particular or, in some contexts, slaves. The plural form Wēalas evolved into the name for their territory, Wales. The modern names for various Romance-speaking people in Continental Europe (e.g. Walloons , Valaisans , Vlachs / Wallachians , and Włosi ,
10266-436: The population in Wales said they had no Welsh language skills. Other estimates suggest that 862,700 people (28.0%) aged three or older in Wales could speak Welsh in March 2024. Almost half of all Welsh speakers consider themselves fluent, while 20 per cent are able to speak a fair amount. 56 per cent of Welsh speakers speak the language daily, and 19 per cent speak the language weekly. The Welsh Government plans to increase
10384-471: The population not being able to speak it. The National Survey for Wales, conducted by Welsh Government, has also tended to report a higher percentage of Welsh speakers than the census, with the most recent results for 2022–2023 suggesting that 18 per cent of the population aged 3 and over were able to speak Welsh, with an additional 16 per cent noting that they had some Welsh-speaking ability. Historically, large numbers of Welsh people spoke only Welsh. Over
10502-502: The population of Wales aged 3 and over, were able to speak the language. Children and young people aged three to 15 years old were more likely to report that they could speak Welsh than any other age group (48.4 per cent, 241,300). Around 1,001,500 people, or 32.5 per cent, reported that they could understand spoken Welsh. 24.7 per cent (759,200) could read and 22.2 per cent (684,500) could write in Welsh. The APS estimates of Welsh language ability are historically higher than those produced by
10620-407: The population of Wales spoke Welsh, compared with 20.8 per cent in the 2001 census , and 18.5 per cent in the 1991 census . Since 2001, however, the number of Welsh speakers has declined in both the 2011 and 2021 censuses to about 538,300 or 17.8 per cent in 2021, lower than 1991, although it is still higher in absolute terms. The 2011 census also showed a "big drop" in the number of speakers in
10738-581: The price specified for carriage of cargo. The freight rate of a tanker charter party is specified in one of four ways: by a lump sum rate, by rate per ton, by a time charter equivalent rate, or by Worldscale rate. In a lump sum rate arrangement, a fixed price is negotiated for the delivery of a specified cargo, and the ship's owner/operator is responsible to pay for all port costs and other voyage expenses. Rate per ton arrangements are used mostly in chemical tanker chartering, and differ from lump sum rates in that port costs and voyage expenses are generally paid by
10856-620: The range of river habitats including beds of submerged aquatic plants often dominated by water-crowfoot Ranunculus spp., as well as a variety of associated riverside habitats. The Cleddau rivers are also a Special Area of Conservation designated for the European bullhead ( Cottus gobio ), European river lamprey ( Lampetra fluviatilis ), Brook lamprey ( Lampetra planeri ), Otter ( Lutra lutra ), Sea lamprey ( Petromyzon marinus ); rivers with floating vegetation often dominated by water-crowfoot (watercourses of plain to montane levels with
10974-528: The record of 100,000 long tons of heavy displacement. His Universe Apollo displaced 104,500 long tons, a 23% increase from the previous record-holder, Universe Leader which also belonged to Ludwig. The first tanker over 100,000 dwt built in Europe was the British Admiral . The ship was launched at Barrow-in-Furness in 1965 by Elizabeth II . The world's largest supertanker was built in 1979 at
11092-409: The required fresh approach to this new role." Huws started her role as the Welsh Language Commissioner on 1 April 2012. Local councils and the Senedd use Welsh, issuing Welsh versions of their literature, to varying degrees. Road signs in Wales are in Welsh and English. Prior to 2016, the choice of which language to display first was the responsibility of the local council. Since then, as part of
11210-788: The rest consisted of refined petroleum products. This amounted to 34.1% of all seaborne trade for the year. Combining the amount carried with the distance it was carried, oil tankers moved 11,705 billion metric-ton-miles of oil in 2005. By comparison, in 1970 1.44 billion metric tons of oil were shipped by tanker. This amounted to 34.1% of all seaborne trade for that year. In terms of amount carried and distance carried, oil tankers moved 6,487 billion metric-ton-miles of oil in 1970. The United Nations also keeps statistics about oil tanker productivity, stated in terms of metric tons carried per metric ton of deadweight as well as metric-ton-miles of carriage per metric ton of deadweight. In 2005, for each 1 DWT of oil tankers, 6.7 metric tons of cargo
11328-434: The rest were smaller designs. By comparison, 8.0 million DWT , 8.7 million DWT , and 20.8 million DWT worth of oil tanker capacity was built in 1980, 1990, and 2000 respectively. Ships are generally removed from the fleet through a process known as scrapping . Ship-owners and buyers negotiate scrap prices based on factors such as the ship's empty weight (called light ton displacement or LDT) and prices in
11446-488: The scrap metal market. In 1998, almost 700 ships went through the scrapping process at shipbreakers in places such as Gadani , Alang and Chittagong . In 2004 and 2005, 7.8 million DWT and 5.7 million DWT respectively of oil tankers were scrapped. Between 2000 and 2005, the capacity of oil tankers scrapped each year has ranged between 5.6 million DWT and 18.4 million DWT . In this same timeframe, tankers have accounted for between 56.5% and 90.5% of
11564-651: The shift occurred over a long period, with some historians claiming that it had happened by as late as the 9th century , with a watershed moment being that proposed by linguist Kenneth H. Jackson , the Battle of Dyrham , a military battle between the West Saxons and the Britons in 577 AD, which split the South Western British from direct overland contact with the Welsh. Four periods are identified in
11682-421: The ship. These holds were further subdivided into port and starboard sections by a longitudinal bulkhead. Earlier designs suffered from stability problems caused by the free surface effect , where oil sloshing from side to side could cause a ship to capsize. But this approach of dividing the ship's storage space into smaller tanks virtually eliminated free-surface problems. This approach, almost universal today,
11800-572: The supply and demand of oil as well as the supply and demand of oil tankers. Some particular variables include winter temperatures, excess tanker tonnage, supply fluctuations in the Persian Gulf , and interruptions in refinery services. In 2006, time-charters tended towards long term. Of the time charters executed in that year, 58% were for a period of 24 or more months, 14% were for periods of 12 to 24 months, 4% were from 6 to 12 months, and 24% were for periods of less than 6 months. From 2003,
11918-713: The system is still used today. Besides that, there is the flexible market scale, which takes typical routes and lots of 500,000 barrels (79,000 m ). Merchant oil tankers carry a wide range of hydrocarbon liquids ranging from crude oil to refined petroleum products. Crude carriers are among the largest, ranging from 55,000 DWT Panamax -sized vessels to ultra-large crude carriers (ULCCs) of over 440,000 DWT. Smaller tankers, ranging from well under 10,000 DWT to 80,000 DWT Panamax vessels, generally carry refined petroleum products, and are known as product tankers. The smallest tankers, with capacities under 10,000 DWT generally work near-coastal and inland waterways. Although they were in
12036-584: The tax authorities wanted evidence that the internal billing records were correct. Before the New York Mercantile Exchange started trading crude oil futures in 1983, it was difficult to determine the exact price of oil, which could change with every contract. Shell and BP , the first companies to use the system, abandoned the AFRA system in 1983, later followed by the US oil companies. However,
12154-526: The use of Welsh in daily life, and standardised spelling. The New Testament was translated by William Salesbury in 1567, and the complete Bible by William Morgan in 1588. Modern Welsh is subdivided into Early Modern Welsh and Late Modern Welsh. Early Modern Welsh ran from the 15th century through to the end of the 16th century, and the Late Modern Welsh period roughly dates from the 16th century onwards. Contemporary Welsh differs greatly from
12272-466: The vessel hull instead of being loaded in barrels or drums. It was also the first tanker with a horizontal bulkhead; its features included cargo valves operable from the deck, cargo main piping, a vapor line, cofferdams for added safety, and the ability to fill a ballast tank with seawater when empty of cargo. The ship was built in Britain, and was purchased by Wilhelm Anton Riedemann, an agent for
12390-424: The voyage charter, the time charter, the bareboat charter , and contract of affreightment . In a voyage charter the charterer rents the vessel from the loading port to the discharge port. In a time charter the vessel is hired for a set period of time, to perform voyages as the charterer directs. In a bareboat charter the charterer acts as the ship's operator and manager, taking on responsibilities such as providing
12508-401: The world's fleet in terms of deadweight tonnage. The world's total oil tankers deadweight tonnage has increased from 326.1 million DWT in 1970 to 960.0 million DWT in 2005. The combined deadweight tonnage of oil tankers and bulk carriers, represents 72.9% of the world's fleet. In 2005, 2.42 billion metric tons of oil were shipped by tanker. 76.7% of this was crude oil, and
12626-610: The world's total scrapped ship tonnage. In this period the average age of scrapped oil tankers has ranged from 26.9 to 31.5 years. In 2005, the price for new oil tankers in the 32,000–45,000 DWT , 80,000–105,000 DWT , and 250,000–280,000 DWT ranges were $ 43 million, $ 58 million, and $ 120 million respectively. In 1985 these vessels would have cost $ 18 million, $ 22 million, and $ 47 million respectively. Oil tankers are often sold second hand. In 2005, 27.3 million DWT worth of oil tankers were sold used. Some representative prices for that year include $ 42.5 million for
12744-490: The world. In Worldscale negotiations, operators and charterers will determine a price based on a percentage of the Worldscale rate. The baseline rate is expressed as WS 100. If a given charter party settled on 85% of the Worldscale rate, it would be expressed as WS 85. Similarly, a charter party set at 125% of the Worldscale rate would be expressed as WS 125. The market is affected by a wide variety of variables such as
12862-870: Was also purpose-built, this time by the Great Western Railway as a transatlantic shipping terminal. Its functions were largely transferred to Fishguard in the early 20th century. Both branches of the Cleddau are noteworthy for their diverse aquatic ecology that has been largely untouched by man's activities. The rivers support otter populations and a wide variety of fish species including Lampreys . Stretches of both rivers have been designated as SSSIs because they are of special interest primarily for important populations of otter Lutra lutra , bullhead Cottus gobio , river lamprey Lampetra fluviatilis and brook lamprey Lampetra planeri . They are also of special interest for sea lamprey Petromyzon marinus; for
12980-731: Was carried. Similarly, each 1 DWT of oil tankers was responsible for 32,400 metric-ton miles of carriage. The main loading ports in 2005 were located in Western Asia, Western Africa, North Africa, and the Caribbean, with 196.3, 196.3, 130.2 and 246.6 million metric tons of cargo loaded in these regions. The main discharge ports were located in North America, Europe, and Japan with 537.7, 438.4, and 215.0 million metric tons of cargo discharged in these regions. International law requires that every merchant ship be registered in
13098-622: Was complete by around AD 550, and labelled the period between then and about AD 800 "Primitive Welsh". This Primitive Welsh may have been spoken in both Wales and the Hen Ogledd ('Old North') – the Brittonic-speaking areas of what are now northern England and southern Scotland – and therefore may have been the ancestor of Cumbric as well as Welsh. Jackson, however, believed that the two varieties were already distinct by that time. The earliest Welsh poetry – that attributed to
13216-550: Was curtailed by US and Belgian authorities citing safety concerns. By 1871, the Pennsylvania oil fields were making limited use of oil tank barges and cylindrical railroad tank-cars similar to those in use today. The modern oil tanker was developed in the period from 1877 to 1885. In 1876, Ludvig and Robert Nobel , brothers of Alfred Nobel , founded Branobel (short for Brothers Nobel) in Baku , Azerbaijan . It was, during
13334-441: Was first used by Swan in the Nobel tankers Blesk , Lumen , and Lux . Others point to Glückauf , another design of Colonel Swan, as being the first modern oil tanker. It adopted the best practices from previous oil tanker designs to create the prototype for all subsequent vessels of the type. It was the first dedicated steam-driven ocean-going tanker in the world and was the first ship in which oil could be pumped directly into
13452-399: Was important in the early Industrial Revolution , shipping anthracite from Llangwm , Landshipping and Crescelly, and limestone from Lawrenny and West Williamston . A small fishing industry operated from harbours such as Pill, Angle and Dale, but in 1790 the building of the new town of Milford commenced, and a large herring fishery grew up based on its docks. In its heyday, it became
13570-518: Was passed and received Royal Assent, thus making the Welsh language an officially recognised language within Wales. The measure: The measure required public bodies and some private companies to provide services in Welsh. The Welsh government's Minister for Heritage at the time, Alun Ffred Jones , said, "The Welsh language is a source of great pride for the people of Wales, whether they speak it or not, and I am delighted that this measure has now become law. I am very proud to have steered legislation through
13688-517: Was probably spoken throughout the island south of the Firth of Forth . During the Early Middle Ages the British language began to fragment due to increased dialect differentiation, thus evolving into Welsh and the other Brittonic languages. It is not clear when Welsh became distinct. Linguist Kenneth H. Jackson has suggested that the evolution in syllabic structure and sound pattern
13806-496: Was renamed Happy Giant in 1989, Jahre Viking in 1991, and Knock Nevis in 2004 (when she was converted into a permanently moored storage tanker). In 2009 she was sold for the last time, renamed Mont , and scrapped . As of 2011, the world's two largest working supertankers are the TI-class supertankers TI Europe and TI Oceania . These ships were built in 2002 and 2003 as Hellespont Alhambra and Hellespont Tara for
13924-674: Was the world's largest flag state for oil tankers, with 528 of the vessels in its registry. Six other flag states had more than 200 registered oil tankers: Liberia (464), Singapore (355), China (252), Russia (250), the Marshall Islands (234) and the Bahamas (209). The Panamanian, Liberian, Marshallese and Bahamian flags are open registries and considered by the International Transport Workers' Federation to be flags of convenience . By comparison,
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