British Upholder Boats in Canadian Service
Canada's Victoria class began as British Upholder-class submarines before transfer and refit.
The Victoria-class submarines were originally built in the United Kingdom as the Upholder class, then acquired by Canada to preserve a conventional submarine capability. Their Canadian service required refit, integration of Canadian combat systems, and a long process of restoring operational availability. The class gave the Royal Canadian Navy a quiet diesel-electric platform for surveillance, training, and maritime deterrence.



