With as their tender, the two boats were based at Esquimalt, British Columbia. They were called "No.1" and "No.2" until October 1914 when they officially received their new names "CC-1" and "CC-2" respectively. Their refit in September and October 1914 was primarily focused on three problems. The first problem was the instability while diving. The boats, especially "CC-2", developed uncontrollable negative buoyancy when the ballast tanks were vented. If the tanks were left partially full, the boats would take dangerous nose or tail dives. This required a reduction in weight which led to the removal of all unnecessary stores, fuel and spare parts. This eventually limited the patrol range of the class to only a few days at a time.