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.
On March 20th, 2018. See this statement in context.
On March 20th, 2018. See this statement in context.
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.
See context to find out what was said next.