No one would argue the Canadian Navy has had an easy time of it with its four Upholder-class diesel-electric submarines. Each one has been plagued with problems since they were acquired from the British Royal Navy a decade ago.
Here’s a nice video of one of them, HMCS CORNER BROOK (ex-HMS URSULA) underway in early June 2011. One of three submarines based on the west coast at Esquimalt, British Columbia, the CORNER BROOK had just transferred from the east coast when this video was shot.
Sadly, the cheerfulness shown in the video didn’t last long. The submarine struck bottom while operating submerged near Vancouver Island in Nootka Sound on June 4, 2011. Despite injuries to two sailors and damage to the submarine, CORNER BROOK was able to return to Esquimalt under her own power. There she remains, awaiting full repairs that are not expected to be completed until at least . . . 2016.
Of the four Upholder-class submarines, only one, HMCS VICTORIA, is operational, although she has yet to be elevated to the fully operational status.
Source – Defence News