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CCGS ''John G. Diefenbaker'' is the name for a Canadian Coast Guard icebreaker that is expected to join the fleet in 2021-2022. She was initially expected to be in service by 2017.〔(Arctic icebreaker delayed as Tories prioritize supply ships ). CBC News, 11 October 2013. 〕 Her namesake, John G. Diefenbaker, was Canada's 13th prime minister. It was Diefenbaker's government that founded the Canadian Coast Guard in 1962. The ship is to be constructed by Seaspan Marine Corporation as part of the National Shipbuilding Procurement Strategy. ==Project history== Officially known as the Polar Class Icebreaker Project, the vessel's commissioned name was announced by Prime Minister Stephen Harper during a visit to Inuvik, Northwest Territories on 28 August 2008. In early February 2011, STX Canada Marine was awarded the contract to design the new icebreaker for the Canadian Coast Guard. Although the majority of the design work will take place in the Vancouver offices of STX Canada, the design team will also include the Finnish engineering company Aker Arctic.〔(Aker Arctic helps design new Canadian icebreaker ). Good News Finland, 29 February 2012. 〕 The work should be complete by the end of 2013, after which the design will be provided to Seaspan/Vancouver Shipyards which will build the ship in Vancouver and deliver her to the Canadian Coast Guard in 2017. The ship will have a crew of approximately 100. She is estimated to be capable of carrying fuel and supplies to be self-sufficient for 270 days and be able of making constant progress through of ice.〔David Pugliese, Polar Icebreaker Design Launched With Awarding of Contract to STX Canada, Ottawa Citizen, 8 February 2012.〕 The C$720 million project was announced in the 27 February 2008 federal budget as a replacement for the nation's largest icebreaker and the flagship of the coast guard, the CCGS ''Louis S. St-Laurent''.〔 (mirror ) 〕〔 〕〔 〕〔 (mirror ) 〕 The term "Polar Class" by the government and media is somewhat confusing as according to the International Association of Classification Societies, all vessels operating in sea ice must be assigned a Polar Class, with PC 1 being capable of "Year-round operation in all Polar waters"〔 (mirror ) 〕 In addition, the United States Coast Guard refers to its large icebreakers as s. Minister of Defence Peter MacKay has stated that the icebreaker will be built in Canada.〔 〕 As of the award of the NSPS contracts, ''John G. Diefenbaker'' will be built by Seaspan in British Columbia. Former Minister of Fisheries and Oceans Loyola Hearn announced the icebreaker will be homeported in his riding of St. John's, Newfoundland and Labrador. He also stated that the vessel will be larger than ''Louis S. St-Laurent'' which she will be replacing.〔 (mirror ) 〕 On Friday, May 30, 2008, Chuck Strahl the Minister of Indian Affairs and Northern Development wrote about the proposed icebreaker in a letter to the editor of the ''Windsor Star''. Strahl wrote that the icebreaker would help protect the Arctic environment, and Canadian sovereignty. In addition he wrote that the Canadian Rangers would be expanded, and that a new Arctic research centre would be built in Resolute Bay. Michael Byers, the Canada Research chair in global politics and international law at UBC, stated that "this icebreaker and new money for mapping is something that Arctic experts like myself have been calling for, for some years now. I hope it's real. I hope it's not just an election promise.〔 We need it and we need it right now. But I'm still somewhat skeptical. This has been done before for cynical electoral politics."〔 〕 The Canadian Coast Guard announced on 28 April 2010 that it is "currently in at the preliminary stages of conceptual design for the polar icebreaker. A “Request for Proposals” to undertake detailed design work will likely be ready mid-2011. Vessel construction is presently scheduled to begin in 2013 with completion of trials and final acceptance anticipated for late 2017." 〔Fisheries and Oceans Canada web site, http://www.ccg-gcc.gc.ca/e0010762〕 In October 2012, a 1:25 scale model of ''John G. Diefenbaker'' was being evaluated in at the National Research Council's Institute for Ocean Technology in St. John's.〔(New polar vessel breaks the ice, on a small scale ). CBC News, 24 October 2012. 〕 Additional testing was carried out at Aker Arctic's ice tank in Finland.〔 In May 2013 the ''Vancouver Sun'' reported that the Harper government acknowledged that both ''John G. Diefenbaker'' and the Royal Canadian Navy's new Joint Support Ships faced a scheduling conflict.〔 〕 According to the ''Vancouver Sun'', because both vessel were scheduled to be built in the same facility, the Harper government would have to choose which project had priority, and went first. The Canadian American Strategic Review argued that ''John G. Diefenbaker'' better served protecting Canadian sovereignty than the Joint Support Ships, and should therefore get built first.〔 〕 However, on 11 October 2013 the National Shipbuilding Procurement Strategy (NSPS) Secretariat announced that the Joint Support Ships would be built first, followed by ''John G. Diefenbaker''. This means that the new polar icebreaker is delayed and the Canadian Coast Guard will have to start necessary measures to keep ''Louis S. St-Laurent'' in service until 2021–2022.〔〔(National Shipbuilding Procurement Strategy Secretariat announces Vancouver Shipyards to build the Joint Support Ships in 2016 ). Canada News Centre, 11 october 2013. 〕 In November 2013, it was reported that the budget for ''John G. Diefenbaker'' was revised up to 1.3 billion Canadian dollars, almost twice the initial estimate.〔(Coast guard’s new icebreaker to cost twice as much as originally estimated ). Calgary Herald, 13 November 2013. 〕 Melanie Carkner of the Canadian Coast Guard has said that part of the price increase was to cover future requirements for the ship. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「CCGS John G. Diefenbaker」の詳細全文を読む スポンサード リンク
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