2 0 1 4 , ▁the ▁Government ▁of ▁Canada ▁purchased ▁ 1 2 ▁upgrade ▁k its ▁that ▁will ▁allow ▁the ▁sub mar ines ▁to ▁fire ▁the ▁M k ▁ 4 8 ▁Mod ▁ 7 AT ▁tor ped o es . ▁ ▁These ▁rad ar ▁and ▁son ar ▁systems ▁were ▁later ▁upgrad ed ▁with ▁the ▁installation ▁of ▁the ▁B AE ▁Type ▁ 2 0 0 7 ▁array ▁and ▁the ▁Type ▁ 2 0 4 6 ▁to wed ▁array . ▁The ▁Canadian ▁T owed ▁Array ▁Son ar ▁( C AN TA SS ) ▁has ▁been ▁integrated ▁into ▁the ▁to wed ▁son ar ▁suite . ▁The ▁U ph older - class ▁sub mar ines ▁were ▁equ ipped ▁with ▁the ▁C K 0 3 5 ▁electro - opt ical ▁search ▁per is cope ▁and ▁the ▁CH 0 8 5 ▁opt ron ic ▁attack ▁per is cope , ▁originally ▁supplied ▁by ▁Pil k ington ▁Opt ron ics . ▁After ▁the ▁Canadian ▁ref it , ▁the ▁sub mar ines ▁were ▁equ ipped ▁with ▁Canadian ▁communication ▁equipment ▁and ▁electronic ▁support ▁measures ▁( ES M ). ▁This ▁included ▁two ▁S SE ▁de co y ▁launch ers ▁and ▁the ▁AR ▁ 9 0 0 ▁E SM . ▁ ▁Const ruction ▁and ▁career ▁The ▁sub marine ▁was ▁laid ▁down ▁as ▁HMS ▁Urs ula ▁at ▁C amm ell ▁La ird ' s ▁Bir ken head ▁yard ▁on ▁ 1 0 ▁January ▁ 1 9 8 9 . ▁She ▁was ▁launched ▁on ▁ 2 8 ▁February ▁ 1 9 9 1 ▁and ▁commission ed ▁into