es ▁were ▁equ ipped ▁with ▁two ▁tw in ▁mount s ▁of ▁V ick ers ▁/ 7 0 ▁cal ib re ▁M k ▁ 6 ▁dual - pur pose ▁guns ▁forward ▁and ▁maintained ▁a ▁single ▁tw in ▁mount ▁of ▁ 3 - inch / 5 0 ▁cal ib re ▁M k ▁ 2 2 ▁guns ▁a ft ▁used ▁in ▁the ▁preceding ▁class . ▁A ▁M k ▁ 6 9 ▁fire ▁control ▁director ▁was ▁added ▁to ▁control ▁the ▁new ▁guns . ▁They ▁were ▁also ▁armed ▁with ▁two ▁Lim bo ▁M k ▁ 1 0 ▁mort ars ▁and ▁two ▁single ▁B of ors ▁ 4 0 ▁mm ▁guns . ▁However ▁the ▁ 4 0 ▁mm ▁guns ▁were ▁dropped ▁in ▁the ▁final ▁design . ▁ ▁The ▁destroy ers ▁were ▁also ▁equ ipped ▁beginning ▁in ▁ 1 9 5 8 ▁with ▁M k ▁ 4 3 ▁hom ing ▁tor ped o es ▁in ▁an ▁effort ▁to ▁increase ▁the ▁distance ▁between ▁the ▁ships ▁and ▁their ▁targets . ▁The ▁M k ▁ 4 3 ▁tor ped o ▁had ▁a ▁range ▁of ▁ ▁at ▁. ▁They ▁were ▁pitch ed ▁over ▁the ▁side ▁by ▁a ▁modified ▁depth ▁charge ▁thro wer . ▁ ▁Service ▁history ▁St . ▁Cro ix , ▁named ▁for ▁a ▁river ▁in ▁New ▁Brun sw ick , ▁was ▁laid ▁down ▁on ▁ 1 5 ▁October ▁ 1 9 5 4 ▁by ▁Marine ▁Indust ries ▁at ▁Sor el , ▁Quebec . ▁The ▁ship ▁was ▁launched ▁on ▁ 1 7 ▁November ▁ 1 9 5 6 ▁and ▁commission ed ▁into ▁the ▁Royal