The Louis S. St. Laurent' and the 'John G. Diefenbaker' are specifically what kind of ships?
CCGS John G. Diefenbaker Polar Class Ships" are also referred to as Polar Classes. Adding to the confusion, the United States Coast Guard refers to its large icebreakers as s. Minister of Defence Peter MacKay 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.
CCGS John G. Diefenbaker 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 NSPS Secretariat announced that the Joint Support Ships would be built first, followed by "John G. Diefenbaker". This means that the new polar icebreaker was delayed and the Canadian Coast Guard will have to start necessary measures to keep "Louis S. St-Laurent" in service until 2021–2022. In November 2013, it was reported that the budget for "John G. Diefenbaker" was revised up to 1.3 billion Canadian dollars, almost twice