▁In ▁British ▁service , ▁the ▁sub mar ines ▁were ▁equ ipped ▁with ▁ 1 4 ▁T iger fish ▁M k ▁ 2 4 ▁Mod ▁ 2 ▁tor ped o es ▁and ▁four ▁U GM - 8 4 ▁Sub - Har po on ▁miss iles . ▁They ▁could ▁also ▁be ▁adapted ▁for ▁use ▁as ▁a ▁min el ayer . ▁The ▁sub mar ines ▁have ▁Type ▁ 1 0 0 7 ▁rad ar ▁and ▁Type ▁ 2 0 4 0 , ▁Type ▁ 2 0 1 9 , ▁Type ▁ 2 0 0 7 ▁and ▁Type ▁ 2 0 4 6 ▁son ar ▁installed . ▁The ▁h ull ▁is ▁fitted ▁with ▁el ast omer ic ▁ac oust ic ▁t iles ▁to ▁reduce ▁ac oust ic ▁signature . ▁In ▁British ▁service ▁the ▁vessels ▁had ▁a ▁complement ▁of ▁seven ▁officers ▁and ▁ 4 0 ▁ratings . ▁ ▁Ref its ▁and ▁Canadian ▁alter ations ▁During ▁the ▁ref it ▁for ▁Canadian ▁service , ▁the ▁Sub - Har po on ▁and ▁mine ▁capabilities ▁were ▁removed ▁and ▁the ▁sub mar ines ▁were ▁equ ipped ▁with ▁the ▁Lock he ed ▁Martin ▁Lib ras cope ▁Sub marine ▁fire - control ▁system ▁( S FC S ) ▁to ▁meet ▁the ▁oper ational ▁requirements ▁of ▁the ▁Canadian ▁Navy . ▁Com ponents ▁from ▁the ▁fire ▁control ▁system ▁of ▁the ▁Ober on - class ▁sub mar ines ▁were ▁installed . ▁This ▁gave ▁the ▁sub mar ines ▁the ▁ability ▁to ▁fire ▁the ▁G ould ▁M k ▁ 4 8 ▁Mod ▁ 4 ▁tor ped o . ▁In ▁