▁Canadian ▁Navy ▁on ▁ 4 ▁October ▁ 1 9 5 8 ▁with ▁the ▁classification ▁D DE ▁ 2 5 6 . ▁ ▁Following ▁her ▁commission ing , ▁the ▁ship ▁was ▁assigned ▁to ▁the ▁Third ▁Canadian ▁Esc ort ▁Squadron . ▁In ▁ 1 9 5 9 ▁as ▁a ▁member ▁of ▁the ▁Fif th ▁Canadian ▁Esc ort ▁Squadron , ▁St . ▁Cro ix ▁esc orted ▁the ▁royal ▁y acht ▁ ▁with ▁Queen ▁Elizabeth ▁II ▁ab o ard ▁during ▁her ▁visit ▁to ▁Canada . ▁The ▁following ▁year , ▁with ▁sister ▁ships ▁, ▁ ▁and ▁, ▁she ▁took ▁part ▁in ▁the ▁ 5 0 0 th ▁anni versary ▁of ▁Prince ▁Henry ▁the ▁N avigator ' s ▁death ▁off ▁Lis bon . ▁ ▁In ▁August ▁ 1 9 6 4 , ▁St . ▁Cro ix ▁was ▁transferred ▁to ▁the ▁west ▁coast . ▁St . ▁Cro ix , ▁along ▁with ▁ ▁and ▁, ▁was ▁one ▁of ▁three ▁R estig ou che - class ▁vessels ▁not ▁selected ▁for ▁modern ization ▁in ▁the ▁Im pro ved ▁R estig ou che ▁( I RE ) ▁project ▁of ▁the ▁late ▁ 1 9 6 0 s . ▁In ▁ 1 9 6 6 ▁St . ▁Cro ix ▁under w ent ▁shock ▁testing ▁off ▁San ▁Francisco . ▁ ▁In ▁ 1 9 6 8 , ▁she ▁was ▁part ▁of ▁the ▁Second ▁Canadian ▁Esc ort ▁Squadron ▁following ▁the ▁un ification ▁of ▁the ▁Canadian ▁Ar med ▁Forces ▁and ▁creation ▁of ▁Mar itime ▁Command ▁in ▁ 1 9 6 7 . ▁In ▁ 1 9 6 7