The CC-class submarine was the first class of submarines used by the Royal Canadian Navy. Designed as diesel-electric submarines for use as coastal defence, they were originally purchased by the province of British Columbia from a shipbuilder in Seattle, Washington, which had built the submarines for the Chilean Navy. Acquired by Canada they saw no battle while in service during the First World War and were paid off in 1920. They were the first Canadian warships to pass through the Panama Canal. Both ships were discarded in 1925.

The Seattle Construction and Drydock Company was a shipbuilding company based in Seattle, Washington. Between 1911 and 1918, it produced a substantial number of ships for both commercial and military uses. In the beginning of the 20th century, until its significance was diluted by the emergence of a number of shipyards during the World War I shipbuilding boom, it was the largest of its kind in Seattle and one of the few significant ship yards along the West Coast of the United States, second only to the Union Iron Works in San Francisco.