▁the ▁Royal ▁Navy ▁on ▁ 8 ▁May ▁ 1 9 9 2 . ▁Urs ula ▁was ▁de comm ission ed ▁on ▁ 1 6 ▁October ▁ 1 9 9 4 . ▁ ▁Looking ▁to ▁dis continue ▁the ▁operation ▁of ▁dies el - elect ric ▁boats , ▁the ▁British ▁government ▁offered ▁to ▁sell ▁Urs ula ▁and ▁her ▁sister ▁sub mar ines ▁to ▁Canada ▁in ▁ 1 9 9 3 . ▁The ▁offer ▁was ▁accepted ▁in ▁ 1 9 9 8 . ▁The ▁four ▁boats ▁were ▁le ased ▁to ▁the ▁Canad ians ▁for ▁US $ 4 2 7 ▁million ▁( plus ▁US $ 9 8 ▁million ▁for ▁up gr ades ▁and ▁alter ation ▁to ▁Canadian ▁standards ), ▁with ▁the ▁le ase ▁to ▁run ▁for ▁eight ▁years ; ▁the ▁sub mar ines ▁would ▁then ▁be ▁sold ▁for ▁£ 1 . ▁ ▁Problem s ▁were ▁discovered ▁with ▁the ▁pip ing ▁w eld s ▁on ▁all ▁four ▁sub mar ines , ▁which ▁delayed ▁the ▁react iv ation ▁of ▁ex - U rs ula ▁and ▁her ▁three ▁sister s . ▁The ▁former ▁Urs ula ▁was ▁handed ▁over ▁to ▁the ▁Canadian ▁Forces ▁on ▁ 2 1 ▁February ▁ 2 0 0 3 , ▁and ▁commission ed ▁as ▁H M CS ▁Cor ner ▁Brook ▁on ▁ 2 6 ▁June ▁ 2 0 0 3 . ▁ ▁Royal ▁Canadian ▁Navy ▁After ▁commission ing , ▁Cor ner ▁Brook ▁was ▁deployed ▁on ▁the ▁east ▁coast ▁of ▁Canada , ▁based ▁out ▁of ▁Hal if ax , ▁Nova ▁Scot ia . ▁During ▁a ▁ref it ▁in