On March 20th, 2018. See this statement in context.
March 20th, 2018 / 9:05 a.m.
Commissioner of the Canadian Coast Guard, Department of Fisheries and Oceans
With respect to the OOSV and the John G. Diefenbaker, neither one of those ships is subject to a construction contract at this point, so I can't give you a in-service date for either one of them.
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