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Glasgow Prestwick Airport

Glasgow Prestwick Airport, commonly referred to as Prestwick Airport, is an international airport serving the west of Scotland, situated 1 nmi northeast of the town of Prestwick Scotland, and 32 mi southwest of Glasgow, Scotland. It is the less busy of the two airports serving the western part of Scotland's Central Belt, after Glasgow Airport in Renfrewshire, within the Greater Glasgow conurbation. The airport serves the urban cluster surrounding Ayr, including Kilmarnock, Irvine, Ardrossan, Troon, Saltcoats, Stevenston, Kilwinning, and Prestwick itself.

Glasgow Prestwick is Scotland's fifth-busiest airport in terms of passenger traffic, although it is the largest in terms of land area. Passenger traffic peaked at 2.4 million in 2007 following a decade of rapid growth, driven in part by the boom in low-cost carriers, particularly Ryanair, which uses the airport as an operating base. In recent years, passenger traffic has declined; around 670,000passengers passed through the airport in 2016.

There has been much public debate and speculation over the association of the airport with Glasgow due to the fact Prestwick and Glasgow are considerably far apart. Calls have been made for the airport to be renamed Robert Burns International Airport, however, this was ruled out by the Scottish Government in 2014.

Prestwick has also had a long historical connection with transatlantic flight, being part of the Atlantic Bridge route between Europe and North America, and remains an important airport for both the United States Air Force and Royal Canadian Air Force, who use it as a refuelling stop. The operations centre of Shanwick Oceanic Control is located close to the airport, which controls all air traffic on the north eastern quadrant of the North Atlantic Ocean, including Scottish airspace (Scottish Area Control Centre), as well as the airspace over much of the north of England, the Midlands and north Wales (Manchester Area Control Centre).

Origins and passenger facilities
Passenger facilities were added in 1938. These were used until further investment made Prestwick compatible with jet transportation. The October 1946 USAAF diagram shows a 6600 ft runway 14/32, with a 4500 ft runway 8/26 crossing just west of its midpoint. In 1958, runway 13/31 was 7000 ft long; in May 1960, the runway's extension to 9800 ft opened.

A parallel taxiway, link road and an all-new terminal building were opened by the Queen Mother in 1964. The extension of runway 13/31 caused considerable disruption to road users, for the main road from Monkton into Prestwick now crossed the tarmac of the runway. This was controlled by a "level crossing" system until a new perimeter road was completed.

Commercial use
Until 1990, the British government required all transatlantic flights to and from Scotland to use Prestwick.

In 1945, American Overseas Airlines began regular transatlantic commercial flights began between Prestwick and New York. AOA was later acquired by Pan Am, which used Prestwick as a stop between Europe and North America into the 1970s. BOAC also used Prestwick as a stop between London and New York in the late 1940s and 1950s.

In the 1980s, Prestwick continued to see scheduled transatlantic flights by Air Canada and Northwest Airlines. These carriers both moved their operations to Glasgow Airport after government restrictions were lifted in 1990.

Military use

In the Second World War the RAF controlled trans-Atlantic flights from Prestwick.

Until February 2016, part of the Prestwick site was occupied by the Royal Navy Fleet Air Arm with RNAS Prestwick, officially known by the Royal Navy as HMS Gannet, where a detachment of three Sea Kings provided a search and rescue role, covering one of the largest SAR areas of the UK including Ben Nevis, the Lakes, Northern Ireland and 200 nmi past the Irish coast. Additionally, Gannet SAR provided a medical evacuation service to the Scottish island communities. Personnel at the base numbered 15 officers, 11 ratings, 28 civil servants and 50 civilian staff. The crews regularly featured as part of the popular Channel 5 documentary series Highland Emergency. In 2009, the unit broke a new record as they were tasked to 447 call-outs, 20% of the UK's total military SAR call outs for 2009 and making them, for the second year in succession, the busiest search and rescue base in the UK.

There was controversy over the airport's use in the CIA's extraordinary rendition flights, as aircraft had used the airport as a stop-over point. Since November 2013, when the Scottish government took control of the facility, service contracts have been established with the USAF, USN, USMC, Defense Logistics Agency and National Guard.

Elvis Presley stopover

Glasgow Prestwick Airport is the only place in the United Kingdom where Elvis Presley (who had distant Scottish ancestry) was known to have set foot, when the United States Air Force transport plane carrying him home to the United States stopped to refuel in 1960, en route from West Germany.

However, on 21 April 2008, during a BBC Radio 2 interview with Ken Bruce, theatre impresario and chairman of Everton FC, Bill Kenwright, said that Elvis actually spent a day in the UK being shown around London by Tommy Steele in 1958.

1990s
1992 marked the beginning of a renaissance for the struggling airport when purchased by "Canadian entrepreneur" Matthew Hudson in a "dramatic rescue". Hudson initiated the construction of the airport's railway station on the existing Ayrshire Coast Line (Glasgow–Ayr), which runs past the airfield, making it the first Scottish airport with its own railway station. In her book about Prestwick Airport, South Ayrshire councillor Ann Galbraith writes about this tough time in the airport's history, saying that "if it hadn't been for Matthew Hudson the airport wouldn't be here today".

In 1994, Irish budget airline Ryanair opened a route to the airport from Dublin, followed by a second route in 1995 to London Stansted. In 1998, a third route to Paris-Beauvais was introduced and the airport was sold by Hudson to the Scottish transport company Stagecoach Group.

2000s

In 2001, the airport was purchased by Infratil, a New Zealand company and majority owner of Wellington International Airport. Infratil also owned Manston Airport until November 2013. Manston was sold to a shell company owned by Ann Gloag, a co-founder of Stagecoach, Prestwick's previous owner. In April 2005, Infratil completed a major refurbishment of the terminal building, and rebranded the airport using the phrase "pure dead brilliant", taken straight from the Glasgow patter. Some of the rebranding has been controversial, in particular the redecoration of the airport bar. The bar was rebranded in February 2006 with a logo depicting a man in a kilt, unconscious with an empty bottle of whisky.

Despite objections that it promoted the wrong image of Scotland to foreign visitors and embarrassed local travellers, the airport management insisted the logo was "fun and visually stimulating". However, it was removed a matter of weeks after installation, after the South Ayrshire Licensing Board said the logo trivialised excessive drinking. The "pure dead brilliant" branding was removed from the main terminal building in January 2014.

Since 2007, the airport has occasionally been used by the BBC TV programme Top Gear as the location for various stunts and experiments. The best-known stunt was a scene similar to one featured in the film Casino Royale and featured both a Ford Mondeo and a Citroën 2CV parked behind the engines of a Virgin Atlantic Boeing 747-400, in an experiment to investigate whether the thrust from the aircraft's four jet engines really could lift a car off the ground.

The car park and A79 outside the terminal building have been reconstructed to comply with governmental movement and access restrictions mandated in the aftermath of the Glasgow International Airport terrorist attack. According to a 2008 Master Plan, the departure lounge is at capacity and congested during peak operations. The plan proposes "a central pier that provides adequate circulation and waiting space prior to boarding the aircraft" to cope with a continuing increase in passenger departures.

2010s

In 2010, NATS, the organisation responsible for en-route air traffic control services to flights within the UK flight information regions, consolidated its air traffic control operations from four facilities to two. The 86,000 square feet (8,000 square metre) operations room at Prestwick is solely responsible for all aircraft flying over Scottish aerospace (Scottish Area Control Centre), which includes all aircraft over Scotland, Northern Ireland, the North of England as well as over the North Sea from 2,500 feet up to 66,000 feet. In addition to being responsible for aircraft over Scottish aerospace as defined by the Scottish Area Control Centre, Prestwick is also responsible for the aerospace over much of the north of England, the Midlands and north Wales from 2,500 feet up to 28,500 feet (Manchester Area Control Centre). Its Oceanic Area Control Centre controls the aerospace over the eastern half of the North Atlantic to a designated boundary in place with Iceland. With a responsibility of aerospace covering 2.84 e6km2, the operations centre at Prestwick has the largest area of aerospace responsibility in Europe, handing 42% of the total aircraft movement across the United Kingdom.

On 8 March 2012, the airport owner Infratil announced that it planned to sell the airfield. The airport remained unsold until October 2013 when the Scottish Government announced it was in negotiations to take the airport back into public ownership. Subsequently, the Scottish Government bought the airport on 22 November 2013 for GB£1 2013, Infratil having incurred annual losses of £2,000,000. No job losses were anticipated after the government takeover. Then-Deputy First Minister Nicola Sturgeon told BBC Scotland that work would then begin on "turning Prestwick around and making it a viable enterprise".

On 1 April 2014, the public petition committee at Holyrood heard that The Robert Burns World Federation wished to rename the airport to Robert Burns International Airport. In June 2014, Ryanair announced the relocation of some routes from Prestwick to Glasgow International Airport by October 2014; included among them were flights to Warsaw and Dublin.

In November 2014 Donald Trump signed a partnership agreement with Prestwick making it the Scottish base for all Trump Aviation Operations, in order to service his Trump Turnberry golf resort 20 mi away.

As part of the privatisation of the UK's search and rescue service, Bristow Helicopters based two Sikorsky S-92 helicopters in a new hangar at HMS Gannet. The handover took place in January 2016. In March 2016, the airport revealed new branding and a new look to the inside and outside of the airport building.

In 2015, Glasgow Prestwick Airport was shortlisted as a potential UK Spaceport, as part of the British commercial spaceport competition.

In June 2019, the Scottish government announced that it was putting the airport up for sale. Bidders would be expected to commit to maintaining and developing aviation operations and employment.

2020s
In February 2021, the Scottish government announced that a preferred bidder had been selected to buy the airport. The unnamed bidder was believed to be a European transport infrastructure investor.

However, the Scottish government announced in December 2021 that the bid had been rejected, and that the sale would not proceed. The airport would consequently remain in public ownership, but the government stated it was committed to "returning it to the private sector at the appropriate time and opportunity." , no private investor has been found yet but there was ongoing debate if the airport is financially viable or will require further loans from the government.

Passenger
The following airlines operate regular scheduled passenger and cargo services to and from Glasgow–Prestwick:

Railway station

Prior to the opening of Inverness Airport railway station in 2023, Prestwick airport was the only airport in Scotland with its own railway station, Prestwick International Airport railway station, built by the airport in 1994. The station is connected to the terminal by an enclosed walkway over the A79 road, and platforms are accessed by stairs, escalators and lifts. The station building continues to be owned and operated by the airport, and not by Network Rail or ScotRail. The track through the station itself remains the responsibility of Network Rail.

Airshow
Prestwick Airport used to host a bi-annual airshow, the first of which was held on 30 September 1967. While very small in scale compared to such shows as RAF Fairford or Farnborough, the Scottish air show attracted up to 100,000 spectators to Prestwick in its heyday in the 1980s.

The revived Scottish International Airshow was first held on 6 and 7 September 2014; an air display was held at the Low green at Ayr Seafront and a static display on 7 September at the airport. The event included appearances by the Battle of Britain Memorial Flight, including the only two flying Avro Lancaster bombers, and the last airworthy Avro Vulcan bomber, famous for being part of the UK's Nuclear "V Force" bomber fleet. The second Scottish Airshow was held on 5 and 6 September 2015.

It was announced that the airshow would return for 2023, rebranded as The International Ayrshow - Festival Of Flight beginning on the weekend of 8 September 2023.

Incidents and accidents

 * On 28 August 1944, a United States Army Air Forces Douglas C54A Skymaster flying from Boston via Keflavik crashed into houses on the south side of the airport while attempting to land. All 20 crew and passengers as well as five people on the ground were killed.
 * On 20 October 1948, a Lockheed L-049 Constellation of KLM crashed on approach to Prestwick; all 40 aboard died.
 * Early on 25 December 1954, at 03:30, the 1954 Prestwick air disaster involved a British Overseas Airways Corporation Boeing 377 Stratocruiser which crashed on landing at Prestwick, killing 28 of the 36 passengers and crew on board. The aircraft had been en route from London to New York City, when, on approach to Prestwick, it entered a steep descent before levelling out too late and too severely, hitting the ground short of the runway. The crash has been attributed to a number of factors, including pilot fatigue (the captain was well over his duty limit due to the aircraft being delayed); the landing lights at Prestwick being out of action due to repair; and the first officer either not hearing a command from the captain for landing lights (which might have helped judge the low cloud base) or mistakenly hitting the flaps, causing the aircraft to stall.
 * On 3 November 1973, Pan Am 160 crashed at Logan International Airport following a loss of control due to smoke. the aircraft was meant to stop over at prestwick.
 * On 17 March 1977, a British Airtours Boeing 707 crashed during a pilot training flight and caught fire. All four crew on board survived.
 * On 6 October 1992, a BAe Jetstream 31 operated by British Aerospace on a training flight to East Midlands Airport crashed shortly after takeoff at Prestwick after simulating an engine failure. Both occupants were killed.
 * On 15 June 2013, an EgyptAir flight from Cairo bound for New York JFK Airport was diverted to Prestwick Airport under RAF escort due to a note found on board threatening to 'set the plane on fire'. Roads surrounding the airport were closed as police dealt with the incident.
 * On 5 September 2015, during the Scottish International Airshow, Avro Vulcan bomber XH558 suffered an issue with its nosewheel. The nosewheel failed to extend properly and lock into place. Once the crew were made aware, a displaying Spitfire was called upon to confirm whether the nosewheel was down and locked, to which they confirmed it wasn't extended properly. The crew finally were able to secure the nosewheel in a fully down position and made a successful landing on runway 30 with an extended flare. There were no injuries and the aircraft and crew made a safe return journey to their home base with the gear extended.
 * On 23 April 2024 a Piper PA-28-181 with two occupants crashed near the airport.

title: Glasgow Prestwick Airport


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Talk:Oil field

What about a little bit of history??. I.e. the world discoverer of the petroleum in Pensilvania (Titus)
 * Well, you might want to be more specific about world discoverer. The Egyptians were using oils from sand pits several thousand years ago.  I also know of animals who discovered oil at La Brea millions of years ago... --Csnewton 13:36, 26 May 2005 (UTC)

"World discoverer of petroleum" is a very megalomanic description of the discovery of oil. Many other countries were using oil before this discovery. Refer to Wiki page on "oil wells".

"The earliest known oil wells were drilled in China in 347 CE. They had depths of up to about 800 feet (240 m) and were drilled using bits attached to bamboo poles.[1] The oil was burned to evaporate brine and produce salt. By the 10th century, extensive bamboo pipelines connected oil wells with salt springs. The ancient records of China and Japan are said to contain many allusions to the use of natural gas for lighting and heating. Petroleum was known as burning water in Japan in the 7th century.[2]

The Middle East's petroleum industry was established by the 8th century, when the streets of the newly constructed Baghdad were paved with tar, derived from petroleum that became accessible from natural fields in the region. Petroleum was distilled by the Persian alchemist Muhammad ibn Zakarīya Rāzi (Rhazes) in the 9th century, producing chemicals such as kerosene in the alembic (al-ambiq),[3] and which was mainly used for kerosene lamps.[4] Arab and Persian chemists also distilled crude oil in order to produce flammable products for military purposes. Through Islamic Spain, distillation became available in Western Europe by the 12th century.[2]" —Preceding unsigned comment added by 66.9.85.4 (talk) 09:35, 5 March 2009 (UTC)

license: Creative Commons - Attribution Share-Alike - https://creativecommons.org/licenses/by-sa/4.0/

title: Talk:Oil field


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HMS Splendid (S106)

HMS Splendid was a Royal Navy nuclear-powered fleet submarine of the Swiftsure-class submarine. From commissioning in 1979 to her decommission in 2004 she took part in many operations involving British forces around the globe.

Construction
HMS Splendid was ordered on 26 May 1976 as the sixth and last submarine of the Swiftsure class. The submarine was laid down at Vickers Shipbuilding Groups Barrow-in-Furness shipyard on 23 November 1977 and was launched on 5 October 1979 by Lady Eberle, wife of Admiral Sir James Eberle, then Commander-in-Chief Fleet. Splendid commissioned on 21 March 1981 under the command of Commander R. C. Lane-Nott.

Operational history
Her first major conflict came in 1982 during the Falklands War when Argentinian forces invaded the British Falkland Islands. Splendid was one of the first submarines to reach the islands, arriving mid-April, after sailing from Faslane. Unlike HMS Conqueror (S48), Splendid did not directly engage Argentinian forces, however she shadowed the Argentine aircraft carrier 25 de Mayo, with Splendid running within a mile outside of the Argentinian territorial line, 12 mi off its Atlantic coast. The captain of Splendid claimed, that running on the edge of the exclusion zone around the Falklands, declared by the UK government, he had the right in international law and approval from the British PM, to fire at 25 de Mayo, a couple of miles away within Argentine waters, and would have fired MK 8 torpedoes at 25 de Mayo, if he had confirmed his precise position. But just at the moment, he lost sight through the periscope of the carrier and was not immediately able to regain contact. The Naval Commander of the task force, Admiral Sandy Woodward, does not appear to be entirely clear, that Splendid had the right to fire, but says he established, against his prior view, that Splendid had orders to engage and approval of the PM. Splendid did however provide valuable reconnaissance to the British Task Force on Argentine aircraft movements. Splendid's presence along with Conqueror effectively restricted the freedom of action of the Argentine Navy, which spent most of the war confined to port.

In November 1998, the Royal Navy attained initial operational capability for the American-built Tomahawk cruise missile with the missile's deployment aboard Splendid. In March 1999, Splendid fired Tomahawks in battle against Serbian targets when NATO forces intervened in the Kosovo War, becoming the first British submarine in the conflict to do so; she would fire 20 Tomahawks throughout the war. She again fired these weapons against Iraqi targets in the 2003 invasion of Iraq.

In July 2003 Splendid returned to her home at Faslane Naval Base on the River Clyde in Scotland. The youngest of the Swiftsure vessels, she was decommissioned in HMNB Devonport, Plymouth in 2004. Commander Burke was later awarded the OBE for his leadership of HMS Splendid in the Gulf.

Alleged involvement in the loss of Kursk
HMS Splendid was alleged by Russian officials to have been present, along with the US Navy submarines USS Memphis (SSN-691) and USS Toledo (SSN-769) at the Russian war games during which the Russian submarine Kursk exploded and sank, resulting in the loss of that submarine and all 118 sailors and officers on board. Despite the conclusions of independent forensic inquiries and the eventual corroborating admission by the Russian Navy that the explosion was triggered by a faulty torpedo on board the Kursk, various conspiracy theories posit that Kursk was actually sunk by one of the US or British submarines. This may partly stem from the Russian Navy's initial attempts to shunt away criticism of its failed efforts to rescue the surviving crew members from the ocean floor and of the generally poor condition of its own equipment, which was eventually found to be the cause of both the sinking and the failure of the Russian rescue attempts. In the days immediately after the explosion, Russia suggested that the cause of the disaster was a collision with one of the US or British submarines present. Though the accusation proved to be unfounded, conspiracy theorists have picked up on and elaborated it in various directions over time.

title: HMS Splendid (S106)


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Talk:Ishihara test

Extra info - discrimination in Japan
This test, aside from its scientific value, has long been applied to institute kinds of social discriminations in Japan, and probably in other countries as well, throughout the 20th century. Particularly before 1950s, those who failed to pass this tests were excluded from engineering schools, military services, and other professions considered needing the ability to differentiate colors. It was a celebrated story that one of the kins of the fiancee of the late Emperor was found to be colorblind, as the test was first applied to the students of the royal school. In spite of the rampant objections within the royal household raised against the marriage, since the colorblindness became known to be hereditary, the Emperor persisted to fulfill the engagement. He was long praised for the decision, and the episode contributed greatly to remove the baseless discrimination caused by the wrong way of application of the test.

Constructing the designs
How are the "patterns and colours of dots" selected so that they present the various different numerical/non-patterns? (For these or "any other similar designs.") Jackiespeel (talk) 21:33, 20 April 2008 (UTC)

"Ishihara Plate No. 19 (2)"
The Ishihara Plate No. 19 in the gallery doesn't show a 2. It shows nothing. People with red green color blindness can trace a line (and don't see a 2 or any other number). --StYxXx (talk) 08:05, 29 July 2013 (UTC)

 * I can see a "2" in plate 19 quite clearly. I appear to have mild Deuteranopia according to the tests.129.78.233.212 (talk) 08:51, 10 September 2013 (UTC)

Exact! The Plate No. 19 presented here does not correspond to standard Ishihara Test. In this image, a person with normal vision can see clearly "2", and a person with color blind to red/green may not see anything. The Ishihara Plate is not the same: http://www.dfisica.ubi.pt/~hgil/p.v.2/Ishihara/Ishihara.24.Plate.TEST.Book.pdf Andreluis7mmv (talk) 14:22, 27 January 2015 (UTC)

 * Huh what do you mean exactly? The plate No. 19 featured in this article clearly doesn't show anything for people with normal color vision. It will show "2" for people with color deficiency. The one in your pdf file is a tracing plate, and people with normal color vision also can't see anything there, but color blind people will see a line and can trace it.--  Krystaleen  14:58, 28 January 2015 (UTC)
 * I've got a feeling that this image is wrong, or the colour hues don't work so well on monitors. It's not part of the standard test and the thumbmail clearly shows a 2 even to a person with normal vision. It's harder to see on a full size image but still present. This is the standard plate 19. http://www.colour-blindness.com/CBTests/ishihara/Plate19.gif and a normal colour vision person does not see anything in it.  — Preceding unsigned comment added by 109.81.208.231 (talk) 18:29, 7 March 2015 (UTC)

 * Looking at the edit history on Commons (https://commons.wikimedia.org/wiki/File:Ishihara_19.PNG), this image has been swapped between two similar patterns, one which has a blue "2" broken by lines, and one which only has lines. I assume some versions of the test have a numbered plate as plate #19, and others have a numberless "tracing plate".
 * This article could use more detail about the tracing plates (which were only mentioned obliquely before today), and whether they were always a part of the Ishihara test, or added later. I assume they exist so that the test can be used on subjects who don't recognise Arabic numberals? --Lord Belbury (talk) 10:35, 17 June 2020 (UTC)
 * The test would be useless for anybody that doesn't recognise arabic numerals. -Roxy the elfin dog . wooF 11:39, 17 June 2020 (UTC)
 * I mean the numberless tracing plates (pictured in the article as plate #19), where the subject is asked to trace an unbroken line rather than read a number. --Lord Belbury (talk) 12:13, 17 June 2020 (UTC)

 * It's also only plate 19 in the reduced 24 plate version. In the full 38 plate test it is found as plate 29, often rotated 180 degrees from what is shown. Gsuberland (talk) 13:06, 29 June 2021 (UTC)
 * This appears to be the only plate referred to by this article that uses the 24 plate numbering, so I've changed it to say 29 and added a note about numbering discrepancies. Gsuberland (talk) 13:42, 29 June 2021 (UTC)

Scientific Write Up?
Has anyone come across an academically written write up of the experimental process Ishihara went through to create these plates. I'd be very interested to read such, and I think this page would benefit from a link to such.Da5nsy (talk) 14:36, 6 May 2014 (UTC)

21? seriously?
I'm 99% sure this is 74 x.x ; modify hue & saturation, and it looks obvious.

Divinity76 (talk) 10:32, 4 November 2014 (UTC)
 * "Example of an Ishihara color test plate. The number "74" should be clearly visible to viewers with normal color vision. Viewers with dichromat or anomalous trichromat may read it as "21", and viewers with achromat may see nothing." Protonk (talk) 14:47, 4 November 2014 (UTC)

We have to be a little careful here as the Ishihara images have been changed and replaced over the years and the "obvious" point above might be talking about a different version (in 2014 the image looked like this), but given the current version on the image on the right, is it correct to say that some viewers will see either 71 or 21?

I can half see that the brown circles to the right of the base of the 7 could possibly "fade in" to certain viewers, with there being some similarly slightly-off brown circles higher up between the two numbers, but are we sure that's a deliberate part of the design rather than an artefact of its creation? It looks like a very minor change in pigment to me. Are you correcting the caption to 21 from personal experience of how it looks to you, User:JsfasdF252? --Lord Belbury (talk) 22:14, 24 November 2020 (UTC)

there is definitely a 2, it is not an artifact, the discoloured redder circles are very intentional (and intentionally subtle); they might not be intended to be obvious to all colour-blind people, but people who cannot perceive the 4 around the 1 at all won't see the 7 at all either, and the darker parts of the 7 will stand out, to be completed by the redder circles into a 2 A Wingless Monkey (talk) 15:43, 17 December 2020 (UTC)

Looking for sources, I've found a few textbooks that talk about 74/21 as a pairing of legible numbers in the test, and this one shows an image which is fairly similar, and just as surprising to me that it forms 21 rather than 71. I'll update the article accordingly, using that source. --Lord Belbury (talk) 16:12, 17 December 2020 (UTC)

Ishihara test external links

 * copied from User talk:Glrx/Archive 10
 * RE: my revert that restored an external link to an Ishihara-like test website

I removed the link you reverted back, as it is obviously self-promotion, you can see it was added in this edit, you can see in the user's talk page and contributions page to check, Jjean3~enwiki — Preceding unsigned comment added by 200.127.180.78 (talk) 18:59, 31 December 2016 (UTC)

 * I do not see this link as obvious self-promotion. I see a reasonable optician providing an interesting application that helps explain Ishihara-like tests. The optician is not selling the application but rather making us aware of it on a relevant page.
 * The link you show was reverted by Ronz. The link was discussed at Talk:Color blindness/Archive 2 with mixed results. The link was reinserted by an IP in this edit in 2008. The link has been around for 8 years. There was no discussion on the Ishihara test talk page.
 * Even if we concede the two editors who added the link are the author, that is not necessarily bad. Yes, there is a WP:COI. Yes, it has a copyright notice that identifies the author, but the question is whether the work is reasonable to include. The offered test is much more extensive than the Toledo-bend website test, and the test evaluation attempts to distinguish the -anopia and -anomaly types of colorblindness. After taking the test, there is a discussion of how different symptoms interpret the images. Consequently, it discusses in more detail how results from Ishihara-like tests are interpreted. That is not addressed in the article.
 * Yes, the link uses advertisements to support the website, but the focus is on colorblindness. The primary goal of the website is to provide information. The website is based on sources because it apparently references two tests (Wickline?).
 * I see WP:ELYES #3: site has apparently accurate information.
 * I see WP:ELMAYBE #4: not an RS but still has knowledgeable information.
 * WP:ELNO #11 arises because it may be a personal website, but the author claims to be an optician, and the site covers several topics appropriate for opticians.
 * It is a tool that runs through some Ishihara-like images, collects answers, and then provides some interpretation of those answers. It is reasonable to include in the Ishihara article.
 * Not an issue, but the link is also present on fr.WP: Daltonisme.
 * Glrx (talk) 21:36, 31 December 2016 (UTC)

title: Talk:Ishihara test