Canadian Navy Submarine Docked Extra Year After Leak Found in Main Ballast Tank

A Sea King helicopter flies over HMCS Corner Brook, the third of four Victoria-class submarines leased from Britain, as it arrives in Halifax on March 10, 2003. The Canadian Press/Andrew Vaughan

OTTAWA—One of the Royal Canadian Navy’s beleaguered submarines is remaining in dock an extra year due to a leak in its main ballast tank, which is used to control whether it goes up or down in the water.

The Department of National Defence says the leak was found in March after the companies working on HMCS Corner Brook didn’t follow the proper procedures for draining the tank during regular maintenance.